- 2024-10-07
-
发表了主题帖:
【Follow me第二季第2期】智能家庭空气质量监测仪
本帖最后由 shazhongjin 于 2024-11-1 17:56 编辑
**首先感谢 DigiKey得捷 | 电子工程世界EEWorld 举办的Follow me活动,与得捷电子一起解锁开发板的超能力!**
## 前言
大家好,我是沙忠金,一名电子小白。
本期的主板Arduino UNO R4 WiFi,前期几期一直在使用MicroPython 以及 CircuitPython,对于Arduino一直只是门外汉。一直停留在听说过从来未使用过。一直感觉Arduino会很难有抵触情绪在里面。也是借着这次任务学习一下Arduino。
本次任务还有一个很吸引的点就是,可以学习一下开发板如何与HomeAssistant连接以及传输数据。毕竟有再多再好的板子没使用场景、没有想法也是沦为吃灰的玩具。恰好新房子刚刚装修,也是在考虑智能家居的实际应用场景,新房最担心的就是空气质量、甲醛等问题了。那么本次主题为“【Follow me第二季第2期】智能家庭空气质量监测仪”
## 项目介绍
本项目包含以下内容:
入门任务(必做):搭建环境并开启第一步Blink / 串口打印Hello EEWorld!
搭配器件: [Arduino UNO R4 WiFi](https://www.digikey.cn/zh/products/detail/arduino/ABX00087/20371539)
基础任务(必做):驱动12x8点阵LED;用DAC生成正弦波;用OPAMP放大DAC信号;用ADC采集并且打印数据到串口等其他接口可上传到上位机显示曲线
搭配器件: [Arduino UNO R4 WiFi](https://www.digikey.cn/zh/products/detail/arduino/ABX00087/20371539)
进阶任务(必做):通过Wi-Fi,利用MQTT协议接入到开源的智能家居平台HA(HomeAssistant)
搭配器件: [Arduino UNO R4 WiFi](https://www.digikey.cn/zh/products/detail/arduino/ABX00087/20371539)
扩展任务(必做,二选一,或根据自己的兴趣,自定义类似难度或更高难度的任务并完成)
■ **扩展任务一:通过外部LTR-329 环境光传感器,上传光照度到HA,通过HA面板显示数据**
搭配器件: [Arduino UNO R4 WiFi](https://www.digikey.cn/zh/products/detail/arduino/ABX00087/20371539)、[5591](https://www.digikey.cn/zh/products/detail/adafruit-industries-llc/5591/16733167)(LTR-329光传感器扩展板)、[PRT-14426](https://www.digikey.cn/zh/products/detail/sparkfun-electronics/PRT-14426/7652739)(Qwiic缆线-50mm)
■ **扩展任务二:通过外部SHT40温湿度传感器,上传温湿度到HA,通过HA面板显示数据**
搭配器件: [Arduino UNO R4 WiFi](https://www.digikey.cn/zh/products/detail/arduino/ABX00087/20371539)、[4885](https://www.digikey.cn/zh/products/detail/adafruit-industries-llc/4885/13694670)(SHT40温湿度传感器扩展板)、[PRT-14426](https://www.digikey.cn/zh/products/detail/sparkfun-electronics/PRT-14426/7652739)(Qwiic缆线-50mm)
本项目视频及源码:
- 视频 [【Follow me第二季第2期】智能家庭空气质量监测仪视频展示](https://training.eeworld.com.cn/video/41250)
- 源码 [【Follow me第二季第2期】智能家庭空气质量监测仪代码展示](https://download.eeworld.com.cn/detail/shazhongjin/634545)
## 开箱及展示
购买的配件有:
[Arduino UNO R4 WiFi](https://www.digikey.cn/zh/products/detail/arduino/ABX00087/20371539)
[4885](https://www.digikey.cn/zh/products/detail/adafruit-industries-llc/4885/13694670)(SHT40温湿度传感器扩展板)
开箱全家福:
## 任务成果展示及说明
### 一、入门任务
搭建环境并开启第一步Blink / 串口打印Hello EEWorld!
#### 1. 硬件介绍
本期使用主板是:[Arduino UNO R4 WiFi](https://www.digikey.cn/zh/products/detail/arduino/ABX00087/20371539) 是一款基于32位Arm® Cortex®-M4 Renesas RA4M1微控制器,具有用于 Wi-Fi® 和蓝牙连接的ESP32模块,具备强大的计算能力和多种连接功能。该板SRAM 32kB,闪存256kB,时钟频率为48MHz,USB端口升级为USB-C,并且最大电源供应电压增加到24V。该板提供了一个CAN总线,允许用户通过连接多个扩展板来最小化布线并执行不同的任务。板载的Qwiic 连接器可以方便地创建即插即用风格的项目。
![](https://content.arduino.cc/assets/Newsletter%20Formats%20-2.gif)
![](https://www.eeworld.com.cn/huodong/digikey_follow_me_2024_02/image/Arduino_UNO_R4_WiFi_pinout.png)
#### 2. 搭建开发环境
1. 访问arduino官网 [https://www.arduino.cc/](https://www.arduino.cc/) ,在官网中点击SOFTWARE进入IDE下载界面。
2. 在Downloads下根据您的操作系统选择适合的安装程序,这里我们选择第一项Windows Win 10 and newer,64bits
3. 找到下载的安装程序“arduino-ide_2.3.2_Windows_64bit”安装后,运行IDE。
4. 点击在左侧开发板管理,也可以通过菜单“工具——开发板——开发板管理”。安装Arduino UNO R4 Boards,
5. 将开发板连接电脑,点击菜单“工具——端口”选择开发板板的端口。可以在连接前后对比多出来的端口就是开发板端口。
6. 点击菜单“工具——开发板”选择Arduino UNO R4 Boards——Arduino UNO R4 WiFi。
7. 随后我们就可以在主界面上来切换不同端口的开发板设备了。
#### 3. Blink / 串口打印Hello EEWorld!
1. 我们同时间隔1s控制板载LED灯开与关,以及向串口输出“Hello EEWorld!”。点击上传等待代码编译及上传后。
2. 点击IDE右上角的“串口监视器”就可以看到开发板向电脑串口输出的消息了。这里还需要注意,开启串口的波特率要与串口监视器的波特率一致才能接收到消息。
#### 4. 软件流程图
#### 5. 代码展示
Follow_me2_task1.ino
``` c++
void setup() {
Serial.begin(9600);
while (!Serial)
delay(10);
}
void loop() {
digitalWrite(LED_BUILTIN, HIGH);
delay(1000);
digitalWrite(LED_BUILTIN, LOW);
delay(1000);
Serial.println("Hello EEWorld!");
}
```
运行展示
[localvideo]9e5a6e8bb2eb97005b46f5355cf24585[/localvideo]
### 二、基础任务
驱动12x8点阵LED;用DAC生成正弦波;用OPAMP放大DAC信号;用ADC采集并且打印数据到串口等其他接口可上传到上位机显示曲线。
这个任务中有多个任务,我们逐一击破。
#### 1. 驱动12x8点阵LED;
**Arduino UNO R4 WiFi** 带有一个内置的 12x8 LED 矩阵,可用于编程以显示图形、动画、充当界面,甚至玩游戏。
![](https://docs.arduino.cc/static/4e8781177f9c3fe0b5a60c9b7dbf1199/4ef49/matrix-closeup.png)
IDE中为我们提供了丰富的示例项目,帮助我们更快的了解每种功能的使用方法。
我们也可以通过官方提供的 LED 矩阵工具[Led Matrix Editor (arduino.cc)](https://ledmatrix-editor.arduino.cc/)来自定义自己的动画。然后点击右上角代码图标,生成下载“animation.h”。
##### 1. 软件流程图
##### 2. 代码展示
Follow_me2_task2_1.ino
``` c++
#include "Arduino_LED_Matrix.h"
#include
ArduinoLEDMatrix matrix;
const uint32_t animation[][4] = {
{
0xfff801bd,
0xd8018018,
0x31801fff,
66
},
{
0xfff801bd,
0xd8018018,
0x71801fff,
66
},
{
0xfff801bd,
0xd8018818,
0x71801fff,
66
}
};
void setup() {
Serial.begin(115200);
// you can also load frames at runtime, without stopping the refresh
matrix.loadSequence(animation);
matrix.begin();
// turn on autoscroll to avoid calling next() to show the next frame; the parameter is in milliseconds
// matrix.autoscroll(300);
matrix.play(true);
pinMode(LED_BUILTIN, OUTPUT);
}
void loop() {
digitalWrite(LED_BUILTIN, HIGH);
delay(1000);
digitalWrite(LED_BUILTIN, LOW);
delay(1000);
}
```
##### 3. 视频展示
[localvideo]f91a2ee6b0d3fe0e316b75dbc3ba1742[/localvideo]
---
更多详细用法参考官方文档:[使用 Arduino UNO R4 WiFi LED 矩阵 |Arduino 文档](https://docs.arduino.cc/tutorials/uno-r4-wifi/led-matrix/)
#### 2. 用DAC生成正弦波;
**DAC** —— Analog to Digital Converter 用于将数字信号转换为模拟信号。
由于没有示波器,这里使用开发板的DA0接口来采集正弦波。连接示意如下:
##### 1. 软件流程图
##### 2. 代码展示
Follow_me2_task2_2.ino
``` c++
#include "analogWave.h" // Include the library for analog waveform generation
analogWave wave(DAC); // Create an instance of the analogWave class, using the DAC pin
int freq = 100; // in hertz, change accordingly
void setup() {
Serial.begin(115200); // Initialize serial communication at a baud rate of 115200
wave.sine(freq); // Generate a sine wave with the initial frequency
wave.amplitude(0.5); //幅值倍数
}
void loop() {
Serial.print(analogRead(A5));
delayMicroseconds(100);
}
```
读取的波形展示
##### 3. 视频展示
[localvideo]5853938174ca279838fb5265ae035094[/localvideo]
---
更多详细用法参考官方文档:[Arduino UNO R4 WiFi Digital-to-Analog Converter (DAC) | Arduino Documentation](https://docs.arduino.cc/tutorials/uno-r4-wifi/dac/)
#### 3. 用OPAMP放大DAC信号;
OPAMP —— Operational Amplifier 运算放大器,是一种用途广泛且应用广泛的电子元件,属于模拟集成电路类。它的主要功能是放大电压信号,但它们的用途非常广泛,可用于:
- 将输入电压镜像到其输出,
- 放大一个小的模拟电压到其输出引脚,UNO R4 的输出电压范围为 0 至 ~4.7 V,
- 比较两个输入电压并给出二进制“更高”或“更低”输出,
- 集成和区分信号。
连接示意如下:
#### 4. 用ADC采集并且打印数据到串口等其他接口可上传到上位机显示曲线。
##### 1. 软件流程图
##### 2. 代码展示
Follow_me2_task2_4.ino
``` c++
#include "analogWave.h" // Include the library for analog waveform generation
#include
analogWave wave(DAC); // Create an instance of the analogWave class, using the DAC pin
int freq = 200; // in hertz, change accordingly
void setup() {
Serial.begin(2000000); // Initialize serial communication at a baud rate of 115200
analogReadResolution(14);
wave.sine(freq); // Generate a sine wave with the initial frequency
wave.amplitude(0.5);//幅值倍数
OPAMP.begin(OPAMP_SPEED_HIGHSPEED);
}
void loop() {
Serial.print(analogRead(A4));
Serial.print(",");
Serial.println(analogRead(A5));
delayMicroseconds(100);
}
```
编译上传代码,在IDE点击“串口绘图仪”查看
##### 3. 视频展示
[localvideo]23c5d804b62cadfe75a6d1042ffcb81e[/localvideo]
### 三、进阶任务
通过Wi-Fi,利用MQTT协议接入到开源的智能家居平台HA(HomeAssistant)
#### 1. 硬件介绍
| 硬件 | 链接、资料 | 图片 |
| -------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ |
| Arduino UNO R4 WiFi | [Getting Started with UNO R4 WiFi Arduino Documentation](https://docs.arduino.cc/tutorials/uno-r4-wifi/r4-wifi-getting-started/) | |
| Adafruit Sensirion SHT40 Tempera | [Adafruit Sensirion SHT40, SHT41 & SHT45 Temperature & Humidity Sensors Adafruit Learning System](https://learn.adafruit.com/adafruit-sht40-temperature-humidity-sensor) | |
#### 2. 环境配置
##### 1. HomeAssistant搭建
首先我们先搭建homeassistant环境,这里我使用unraid系统。相较于windows或者是linux上使用命令行会容易许多。
直接在工作台首页中点击“应用”,在应用页面下搜索“homeassistant”。unraid会列出忧患homeassistant的应用。第一个为直接docker拉取镜像的core版的ha,第二个为通过docker安装的虚拟机版的ha也就是os版ha。各个版本差异如下:
这里我就直接安装docker版ha,安装时需要配置下webui的端口号8123默认即可。点击应用后就会自动拉取镜像并且运行。
在浏览器中输入\[IP]\:\[PORT\] 我这里是http://192.168.2.200:8123/,进入homeassistant的webui界面。
##### 2. MQTT服务器搭建
在工作台首页中点击“应用”,在应用页面下搜索“emqx”。只有一个搜索结果,我们直接安装就好了。
安装后容器自动运行。
在浏览器中输入\[IP]\:\[PORT\] 我这里是http://192.168.2.200:18083/,进入emqx的webui界面。
##### 3. 配置MQTT
进入homeassistant的webui界面,点击左侧设置标签,在页面中点击设备与服务。
在右下角点击添加集成,在弹出的选择品牌或集成对话框中输入“mqtt”。
然后选择第一个MQTT。
输入MQTT服务器的地址、端口、用户名及密码,这里我的homeassistant与emqx在同一网段内,这里我直接填写内网的IP地址,端口为默认的1883。
连接成功后会提示“成功”,并设置区域。这里直接点击完成即可。
配置完成后,MQTT设备以及实体情况。
#### 3. 软件流程图
1. 初始化:
- 设置Wi-Fi和MQTT参数。
- 初始化串口通信。
- 初始化SHT4x传感器。
2. Wi-Fi连接:
- 尝试连接到指定的Wi-Fi网络,最多重试5次。
- 连接成功后,输出连接成功的消息。
3. 传感器初始化:
- 初始化SHT4x传感器,设置精度和加热器配置。
- 输出传感器初始化完成的消息。
4. MQTT连接:
- 连接到MQTT服务器。
- 设置设备名称、软件版本和传感器图标等。
5. 主循环:
- 每隔5秒读取温湿度传感器数据。
- 将读取到的数据通过MQTT发送到Home Assistant。
- 处理按钮命令,控制板载LED的开关状态。
#### 4. 代码展示
Follow_me2_task3.ino
``` c++
#include "WiFiS3.h"
#include "SPI.h"
#include "Adafruit_SHT4x.h"
#include "ArduinoHA.h"
#include "arduino_secrets.h"
#include "arduino_mqtt.h"
char sta_ssid[] = SECRET_STA_SSID; // your network SSID (name)
char sta_pass[] = SECRET_STA_PASS; // your network password (use for WPA, or use as key for WEP)
char addr[] = MQTT_BROKER_ADDR;
int port = MQTT_BROKER_PORT;
char username[] = MQTT_BROKER_USERNAME;
char password[] = MQTT_BROKER_PASSWORD;
int status = WL_IDLE_STATUS;
// Sensor read intervals (in milliseconds)
const unsigned long sensorCInterval = 5000; // other Sensor read intervals 5s
const unsigned long reconnectInterval = 600000;
// Last time the sensors were read
unsigned long previousMillisC = 0;
unsigned long previousMillisReconnect = 0;
WiFiClient client;
// Arduino Home Assistant integration
HADevice device("arduino"); //HADevice device(mac, sizeof(mac));
HAMqtt mqtt(client, device);
Adafruit_SHT4x sht4 = Adafruit_SHT4x();
HASensor sht4_temperature_sensor("sht4_temperature_sensor");
HASensor sht4_relative_humidity_sensor("sht4_relative_humidity_sensor");
HAButton board_led("board_led");
void setup() {
Serial.begin(9600);
while (!Serial)
delay(10);
Adafruit_SHT4x_Init();
reconnect();
device.setName("arduino uno r4 wifi");
device.setSoftwareVersion("1.0.0");
sht4_temperature_sensor.setIcon("mdi:home");
sht4_temperature_sensor.setName("Temperature");
sht4_temperature_sensor.setUnitOfMeasurement("°C");
sht4_relative_humidity_sensor.setIcon("mdi:home");
sht4_relative_humidity_sensor.setName("Humidity");
sht4_relative_humidity_sensor.setUnitOfMeasurement("%");
board_led.setIcon("mdi:fire");
board_led.setName("Click me A");
board_led.onCommand(onButtonCommand);
mqtt.setKeepAlive(60);
mqtt.begin(addr,port,username,password);
}
void loop() {
unsigned long currentMillis = millis();
mqtt.loop();
char tempbuffer[10];
char humibuffer[10];
// 非阻塞读取sht40传感器数据 5s
if (currentMillis - previousMillisC >= sensorCInterval) {
previousMillisC = currentMillis;
// 获取温湿度传感器sht40数据
sensors_event_t humi, temp;
sht4.getEvent(&humi, &temp);
Serial.print("Temperature: "); Serial.print(temp.temperature); Serial.println("℃");
Serial.print("Humidity: "); Serial.print(humi.relative_humidity); Serial.println("% rH");
dtostrf(temp.temperature, 6, 2, tempbuffer);
dtostrf(humi.relative_humidity, 6, 2, humibuffer);
sht4_temperature_sensor.setValue(tempbuffer);
sht4_relative_humidity_sensor.setValue(humibuffer);
}
}
void onButtonCommand(HAButton* sender)
{
if (sender == &board_led) {
if (digitalRead(LED_BUILTIN) == HIGH){
digitalWrite(LED_BUILTIN, LOW);
Serial.println("LED light off");
}
else{
digitalWrite(LED_BUILTIN, HIGH);
Serial.println("LED light on");
}
}
}
void reconnect() {
Serial.print("Attempting to connect to SSID: ");
Serial.print(sta_ssid);
int i = 0;
while (status != WL_CONNECTED) {
Serial.print(".");
status = WiFi.begin(sta_ssid, sta_pass);
i++;
if (status == WL_CONNECTED){
Serial.println("Connected to WiFi successfully");
//Serial.println(WiFi.localIP());
break;
}
if(i == 5)
break;
delay(5000);
}
}
void Adafruit_SHT4x_Init() {
Serial.println("Adafruit SHT4x Initializing...");
if (!sht4.begin(&Wire1)) {
Serial.println("Couldn't find SHT4x");
while (1) delay(1);
}
Serial.println("Found SHT4x sensor");
Serial.print("Serial number 0x");
Serial.println(sht4.readSerial(), HEX);
// You can have 3 different precisions, higher precision takes longer
sht4.setPrecision(SHT4X_HIGH_PRECISION);
switch (sht4.getPrecision()) {
case SHT4X_HIGH_PRECISION:
Serial.println("High precision");
break;
case SHT4X_MED_PRECISION:
Serial.println("Med precision");
break;
case SHT4X_LOW_PRECISION:
Serial.println("Low precision");
break;
}
// You can have 6 different heater settings
// higher heat and longer times uses more power
// and reads will take longer too!
sht4.setHeater(SHT4X_NO_HEATER);
switch (sht4.getHeater()) {
case SHT4X_NO_HEATER:
Serial.println("No heater");
break;
case SHT4X_HIGH_HEATER_1S:
Serial.println("High heat for 1 second");
break;
case SHT4X_HIGH_HEATER_100MS:
Serial.println("High heat for 0.1 second");
break;
case SHT4X_MED_HEATER_1S:
Serial.println("Medium heat for 1 second");
break;
case SHT4X_MED_HEATER_100MS:
Serial.println("Medium heat for 0.1 second");
break;
case SHT4X_LOW_HEATER_1S:
Serial.println("Low heat for 1 second");
break;
case SHT4X_LOW_HEATER_100MS:
Serial.println("Low heat for 0.1 second");
break;
}
Serial.println("Adafruit SHT4x Initialization Completed");
}
```
arduino_mqtt.h
``` c++
// MQTT服务链接
#define MQTT_BROKER_ADDR "emqx.inversedesign.net" // 这里输入你的mqtt服务器地址
#define MQTT_BROKER_PORT 1883
#define MQTT_BROKER_USERNAME "arduino uno r4 wifi"
#define MQTT_BROKER_PASSWORD "arduino uno r4 wifi"
```
arduino_secrets.h
``` c++
// 双引号中输入你的 WIFI 账号密码
#define SECRET_STA_SSID ""
#define SECRET_STA_PASS ""
```
#### 5. 视频演示
[localvideo]378f3ed02ebee24b3df64150ff8b19e3[/localvideo]
### 四、扩展任务
#### 1. 硬件介绍
| 硬件 | 链接、资料 | 图片 |
| -------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------ |
| Arduino UNO R4 WiFi | [Getting Started with UNO R4 WiFi Arduino Documentation](https://docs.arduino.cc/tutorials/uno-r4-wifi/r4-wifi-getting-started/) | |
| Adafruit Sensirion SHT40 Tempera | [Overview Adafruit Sensirion SHT40, SHT41 & SHT45 Temperature & Humidity Sensors Adafruit Learning System](https://learn.adafruit.com/adafruit-sht40-temperature-humidity-sensor) | |
| 攀藤PMS7003——颗粒物传感器 | [PMS7003---激光颗粒物传感器-南昌攀藤科技有限公司 (plantower.com)](https://www.plantower.com/products_16/8.html) | |
| 盛思锐SCD41——co2传感器 | [SCD41-突破CO₂ 传感器尺寸壁垒 (sensirion.com)](https://sensirion.com/cn/products/product-catalog/SCD41) | |
| DART WZ-H3-NK——HCHO传感器 | [WZ-H3-N型长寿命抗干扰甲醛检测模组-智能传感器模组-深圳市普晟传感技术有限公司-普晟传感-甲醛传感器-一氧化碳传感器-氢气传感器-普晟传感-氢气传感器-氨气传感器-硫化氢传感器-气体传感器-传感器公司 (szprosense.com)](https://www.szprosense.com/?list_28/79.html) | |
| ENS160 | [ENS16x Digital Metal-Oxide Multi-Gas Sensor Family - ScioSense](https://www.sciosense.com/ens16x-digital-metal-oxide-multi-gas-sensor-family/) | |
#### 2. 硬件连接
Adafruit Sht40 通过Qwiic线缆连接到Qwiic I2C插槽,SCD41 与 ENS160 与板载I2C引脚连接。查看Arduino UNO R4 WiFi开发板的原理图I2C的引脚没有没有连接上拉电阻,SCL与SDA分别与3.3v连接一个10kΩ的电阻。ENS160我购买的是已经焊接好的模块,需要一个3.3v和一个1.8v的供电,3.3v供电开发板上直接就可以获得但是1.8v没有直接来源,需要从5v或3.3v降到1.8v才行。经过查询资料以及淘宝,最终选择了AMS1117-1.8。
WZ-H3-NK的TX、RX与A2、A3连接使用软串口SoftwareSerial读取数据,PMS7003与A0、A1硬件串口连接。连接原型如下
元器件与开发板连接关系以及示例程序调试已经逐一调通,下面我们来为这些元器件设计个PCB。这是我第一次绘制PCB,在立创开源平台上找一些开源项目再配合搭配的元器件的基本电路,终于设计出自己的第一个PCB。在漫长的打样等待中。
经过了前几期的活动的不断学习尝试,焊接技术也有了十足的进步。焊接排针、排母这些连接器不需要事先找找感觉了。贴片元器件也是在几次尝试后成功的焊接上,并测试没有短路断路。
合体后的样子
#### 3. 必要环境搭建
mqtt服务器、homeassistant系统可参考、沿用进阶任务的环境。
#### 4. 软件流程图
1. 初始化:
- 设置Wi-Fi和MQTT Broker的参数。
- 初始化各个传感器对象。
- 设置传感器读取间隔时间。
- 连接到MQTT Broker并设置回调函数。
2. 主循环:
- 每10分钟检查网络连接状态,如果未连接则尝试重连。
- 每30秒检查是否需要开启PM传感器,如果需要则开启并读取数据,然后关闭。
- 每30秒检查是否需要读取HCHO传感器数据,如果需要则读取。
- 每5秒检查是否需要读取其他传感器(温湿度、VOC、二氧化碳)数据,如果需要则读取并发送数据。
3. 数据处理:
- 将传感器数据转换为字符串格式。
- 通过MQTT将数据发送到Home Assistant。
#### 5. 代码展示
本项目中使用到的库
| 库名 | 用途 | 项目地址 |
| -------------------------- | --------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Adafruit SHT4x Library | SHT4X 数字湿度 + 温度传感器的库。 | [adafruit/Adafruit_SHT4X: Arduino driver for Adafruit SHT4X temperature / humidity breakout (github.com)](https://github.com/adafruit/Adafruit_SHT4x) |
| WZ Library | 面向`达特WZ-S`、`普晟WZ-H3`、`炜盛ZE08-CH2O`系列甲醛传感器的Arduino开发库 | https://github.com/leonlucc/WZ |
| PMS Library | 用于 Plantower PMS 传感器的 Arduino 库。 支持 PMS x003 传感器(1003、3003、5003、6003、7003)。 | [fu-hsi/PMS: Arduino library for Plantower PMS x003 family sensors. (github.com)](https://github.com/fu-hsi/pms) |
| Sensirion I2C SCD4x | 这是使用 I2C 接口的 Arduino 的 Sensirion SCD4x 库。 | [Sensirion/arduino-i2c-scd4x: Arduino library for Sensirion SCD4x sensors (github.com)](https://github.com/Sensirion/arduino-i2c-scd4x) |
| ENS160 - Adafruit Fork | 用于ENS160气体传感器的库。 | [adafruit/ENS160_driver: Driver for the ScioSense ENS160 digital gas sensor (github.com)](https://github.com/adafruit/ENS160_driver) |
| home-assistant-integration | ArduinoHA 允许使用 MQTT 将基于 Arduino/ESP 的设备与 Home Assistant 集成。 | [dawidchyrzynski/arduino-home-assistant: ArduinoHA 允许使用 MQTT 将基于 Arduino/ESP 的设备与 Home Assistant 集成。 (github.com)](https://github.com/dawidchyrzynski/arduino-home-assistant) |
Follow_me2_expand_task.ino
``` c++
#include "WiFiS3.h"
#include "SPI.h"
#include "Adafruit_SHT4x.h"
#include "WZ.h"
#include "SoftwareSerial.h"
#include "ScioSense_ENS160.h"
#include "PMS.h"
#include "SensirionI2CScd4x.h"
#include "ArduinoHA.h"
#include "arduino_secrets.h"
#include "arduino_mqtt.h"
char sta_ssid[] = SECRET_STA_SSID; // your network SSID (name)
char sta_pass[] = SECRET_STA_PASS; // your network password (use for WPA, or use as key for WEP)
char addr[] = MQTT_BROKER_ADDR;
int port = MQTT_BROKER_PORT;
char username[] = MQTT_BROKER_USERNAME;
char password[] = MQTT_BROKER_PASSWORD;
int status = WL_IDLE_STATUS;
const byte PIN_RX = 3;
const byte PIN_TX = 2;
// Sensor read intervals (in milliseconds)
const unsigned long sensorAStartInterval = 30000; // pm Sensor read intervals 60s
const unsigned long sensorAReadDuration = 60000; // pm Sensor read intervals 60s
const unsigned long sensorBInterval = 30000; // hcho Sensor read intervals 60s
const unsigned long sensorCInterval = 5000; // other Sensor read intervals 5s
const unsigned long reconnectInterval = 600000;
// Last time the sensors were read
unsigned long previousMillisA = 0;
unsigned long previousMillisB = 0;
unsigned long previousMillisC = 0;
unsigned long previousMillisReconnect = 0;
bool sensorActive = false;
WiFiClient client;
// Arduino Home Assistant integration
HADevice device("aiaq"); //HADevice device(mac, sizeof(mac));
HAMqtt mqtt(client, device);
Adafruit_SHT4x sht4 = Adafruit_SHT4x();
SensirionI2CScd4x scd4x;
ScioSense_ENS160 ens160(ENS160_I2CADDR_0);
SoftwareSerial WzSoftSerial(PIN_RX, PIN_TX);
WZ wz(WzSoftSerial);
WZ::DATA hcho_data;
PMS pms(Serial1);
PMS::DATA data;
HASensor sht4_temperature_sensor("sht4_temperature_sensor");
HASensor sht4_relative_humidity_sensor("sht4_relative_humidity_sensor");
HASensor pms7003_pm1_sensor("pms7003_pm1_sensor");
HASensor pms7003_pm2_5_sensor("pms7003_pm2_5_sensor");
HASensor pms7003_pm10_sensor("pms7003_pm10_sensor");
HASensor wz_h3_hcho_ppd_sensor("wz_h3_hcho_ppd_sensor");
HASensor wz_h3_hcho_ugm3_sensor("wz_h3_hcho_ugm3_sensor");
HASensor scd4_co2_sensor("co2");
HASensor ens160_aqi_sensor("aqi");
HASensor ens160_tvoc_sensor("tvoc");
HASensor ens160_eco2_sensor("eco2");
void setup() {
Serial.begin(9600);
while (!Serial)
delay(10);
Adafruit_SHT4x_Init();
WZ_Init();
ENS160_Init();
PMS_Init();
SCD41_Init();
reconnect();
device.setName("aiaq");
device.setSoftwareVersion("1.0.0");
sht4_temperature_sensor.setIcon("mdi:home");
sht4_temperature_sensor.setName("Temperature");
sht4_temperature_sensor.setUnitOfMeasurement("°C");
sht4_relative_humidity_sensor.setIcon("mdi:home");
sht4_relative_humidity_sensor.setName("Humidity");
sht4_relative_humidity_sensor.setUnitOfMeasurement("%");
pms7003_pm1_sensor.setIcon("mdi:home");
pms7003_pm1_sensor.setName("PM1");
pms7003_pm1_sensor.setUnitOfMeasurement("ug/m3");
pms7003_pm2_5_sensor.setIcon("mdi:home");
pms7003_pm2_5_sensor.setName("PM2.5");
pms7003_pm2_5_sensor.setUnitOfMeasurement("ug/m3");
pms7003_pm10_sensor.setIcon("mdi:home");
pms7003_pm10_sensor.setName("PM10");
pms7003_pm10_sensor.setUnitOfMeasurement("ug/m3");
wz_h3_hcho_ppd_sensor.setIcon("mdi:home");
wz_h3_hcho_ppd_sensor.setName("hcho");
wz_h3_hcho_ppd_sensor.setUnitOfMeasurement("ppd");
wz_h3_hcho_ugm3_sensor.setIcon("mdi:home");
wz_h3_hcho_ugm3_sensor.setName("hcho");
wz_h3_hcho_ugm3_sensor.setUnitOfMeasurement("ugm3");
scd4_co2_sensor.setIcon("mdi:home");
scd4_co2_sensor.setName("Co2");
scd4_co2_sensor.setUnitOfMeasurement("ppm");
ens160_aqi_sensor.setIcon("mdi:home");
ens160_aqi_sensor.setName("AQI");
ens160_aqi_sensor.setUnitOfMeasurement("");
ens160_eco2_sensor.setIcon("mdi:home");
ens160_eco2_sensor.setName("eCo2");
ens160_eco2_sensor.setUnitOfMeasurement("ppm");
ens160_tvoc_sensor.setIcon("mdi:home");
ens160_tvoc_sensor.setName("TVOC");
ens160_tvoc_sensor.setUnitOfMeasurement("ppb");
mqtt.onMessage(onMqttMessage);
mqtt.onConnected(onMqttConnected);
mqtt.onDisconnected(onMqttDisconnected);
mqtt.onStateChanged(onMqttStateChanged);
mqtt.setKeepAlive(60);
mqtt.begin(addr,port,username,password);
}
void loop() {
unsigned long currentMillis = millis();
mqtt.loop();
char pm1buffer[10];
char pm25buffer[10];
char pm10buffer[10];
char ppdbuffer[10];
char ugm3buffer[10];
char tempbuffer[10];
char humibuffer[10];
char aqibuffer[10];
char tvocbuffer[10];
char eco2buffer[10];
char co2buffer[10];
// 非阻塞检查网络连接并重连 10min
if (currentMillis - previousMillisReconnect >= reconnectInterval) {
previousMillisReconnect = currentMillis;
if (!client.connected()){
reconnect();
}
}
// 非阻塞开启PM传感器 30s
if (!sensorActive && currentMillis - previousMillisA >= sensorAStartInterval) {
previousMillisA = currentMillis;
pms.wakeUp();
sensorActive = true;
}
// 非阻塞读取PM传感器数据 60s 并关闭
if (sensorActive && currentMillis - previousMillisA >= sensorAReadDuration) {
pms.requestRead();
if (pms.readUntil(data)) {
digitalWrite(LED_BUILTIN, HIGH);
Serial.print("PM 1.0 (ug/m3): "); Serial.println(data.PM_AE_UG_1_0);
Serial.print("PM 2.5 (ug/m3): "); Serial.println(data.PM_AE_UG_2_5);
Serial.print("PM 10.0 (ug/m3): "); Serial.println(data.PM_AE_UG_10_0);
dtostrf(data.PM_AE_UG_1_0, 6, 2, pm1buffer);
dtostrf(data.PM_AE_UG_2_5,6,2,pm25buffer);
dtostrf(data.PM_AE_UG_10_0, 6, 2, pm10buffer);
pms7003_pm1_sensor.setValue(pm1buffer);
pms7003_pm2_5_sensor.setValue(pm25buffer);
pms7003_pm10_sensor.setValue(pm10buffer);
}
else{
Serial.println("PM Sensor No data.");
}
pms.sleep();
digitalWrite(LED_BUILTIN, LOW);
sensorActive = false;
}
// 非阻塞读取HCHO传感器数据 30s
if (currentMillis - previousMillisB >= sensorBInterval) {
previousMillisB = currentMillis;
digitalWrite(LED_BUILTIN, HIGH);
// 获取甲醛传感器WZ-H3-NK数据
wz.requestRead();
if (wz.readUntil(hcho_data)) {
Serial.print("HCHO (ppd): ");
Serial.println(hcho_data.HCHO_PPB);
Serial.print("HCHO (ug/m3): ");
Serial.println(hcho_data.HCHO_UGM3);
dtostrf(hcho_data.HCHO_PPB, 6, 2, ppdbuffer);
dtostrf(hcho_data.HCHO_UGM3, 6, 2, ugm3buffer);
wz_h3_hcho_ppd_sensor.setValue(ppdbuffer);
wz_h3_hcho_ugm3_sensor.setValue(ugm3buffer);
}
digitalWrite(LED_BUILTIN, LOW);
}
// 非阻塞读取其他传感器数据 5s
if (currentMillis - previousMillisC >= sensorCInterval) {
previousMillisC = currentMillis;
digitalWrite(LED_BUILTIN, HIGH);
// 获取温湿度传感器sht40数据
sensors_event_t humi, temp;
sht4.getEvent(&humi, &temp);
Serial.print("Temperature: "); Serial.print(temp.temperature); Serial.println("℃");
Serial.print("Humidity: "); Serial.print(humi.relative_humidity); Serial.println("% rH");
dtostrf(temp.temperature, 6, 2, tempbuffer);
dtostrf(humi.relative_humidity, 6, 2, humibuffer);
sht4_temperature_sensor.setValue(tempbuffer);
sht4_relative_humidity_sensor.setValue(humibuffer);
// 获取VOC传感器
if (ens160.available()) {
ens160.measure(true);
ens160.measureRaw(true);
Serial.print("AQI: "); Serial.println(ens160.getAQI());
Serial.print("TVOC: "); Serial.print(ens160.getTVOC()); Serial.println("ppb");
Serial.print("eCO2: "); Serial.print(ens160.geteCO2()); Serial.println("ppm");
dtostrf(ens160.getAQI(), 6, 2, aqibuffer);
dtostrf(ens160.getTVOC(), 6, 2, tvocbuffer);
dtostrf(ens160.geteCO2(), 6, 2, eco2buffer);
ens160_aqi_sensor.setValue(aqibuffer);
ens160_tvoc_sensor.setValue(tvocbuffer);
ens160_eco2_sensor.setValue(eco2buffer);
}
// 获取二氧化碳传感器
uint16_t error;
char errorMessage[256];
// Read Measurement
uint16_t co2 = 0;
float temperature = 0.0f;
float humidity = 0.0f;
bool isDataReady = false;
error = scd4x.getDataReadyFlag(isDataReady);
if (error) {
Serial.print("Error trying to execute getDataReadyFlag(): ");
errorToString(error, errorMessage, 256);
Serial.println(errorMessage);
return;
}
if (!isDataReady) {
return;
}
error = scd4x.readMeasurement(co2, temperature, humidity);
if (error) {
Serial.print("Error trying to execute readMeasurement(): ");
errorToString(error, errorMessage, 256);
Serial.println(errorMessage);
} else if (co2 == 0) {
Serial.println("Invalid sample detected, skipping.");
} else {
Serial.print("Co2:"); Serial.println(co2);
dtostrf(co2, 6, 2, co2buffer);
scd4_co2_sensor.setValue(co2buffer);
digitalWrite(LED_BUILTIN, LOW);
}
}
}
void reconnect() {
Serial.print("Attempting to connect to SSID: ");
Serial.print(sta_ssid);
int i = 0;
while (status != WL_CONNECTED) {
Serial.print(".");
status = WiFi.begin(sta_ssid, sta_pass);
i++;
if (status == WL_CONNECTED){
Serial.println("Connected to WiFi successfully");
//Serial.println(WiFi.localIP());
break;
}
if(i == 5)
break;
delay(5000);
}
}
void onMqttMessage(const char* topic, const uint8_t* payload, uint16_t length) {
// This callback is called when message from MQTT broker is received.
// Please note that you should always verify if the message's topic is the one you expect.
// For example: if (memcmp(topic, "myCustomTopic") == 0) { ... }
Serial.print("New message on topic: ");
Serial.println(topic);
Serial.print("Data: ");
Serial.println((const char*)payload);
}
void onMqttConnected() {
Serial.println("Connected to the broker!");
}
void onMqttDisconnected() {
Serial.println("Disconnected from the broker!");
}
void onMqttStateChanged(HAMqtt::ConnectionState state) {
Serial.print("MQTT state changed to: ");
Serial.println(static_cast(state));
}
void Adafruit_SHT4x_Init() {
Serial.println("Adafruit SHT4x Initializing...");
if (!sht4.begin(&Wire1)) {
Serial.println("Couldn't find SHT4x");
while (1) delay(1);
}
Serial.println("Found SHT4x sensor");
Serial.print("Serial number 0x");
Serial.println(sht4.readSerial(), HEX);
// You can have 3 different precisions, higher precision takes longer
sht4.setPrecision(SHT4X_HIGH_PRECISION);
switch (sht4.getPrecision()) {
case SHT4X_HIGH_PRECISION:
Serial.println("High precision");
break;
case SHT4X_MED_PRECISION:
Serial.println("Med precision");
break;
case SHT4X_LOW_PRECISION:
Serial.println("Low precision");
break;
}
// You can have 6 different heater settings
// higher heat and longer times uses more power
// and reads will take longer too!
sht4.setHeater(SHT4X_NO_HEATER);
switch (sht4.getHeater()) {
case SHT4X_NO_HEATER:
Serial.println("No heater");
break;
case SHT4X_HIGH_HEATER_1S:
Serial.println("High heat for 1 second");
break;
case SHT4X_HIGH_HEATER_100MS:
Serial.println("High heat for 0.1 second");
break;
case SHT4X_MED_HEATER_1S:
Serial.println("Medium heat for 1 second");
break;
case SHT4X_MED_HEATER_100MS:
Serial.println("Medium heat for 0.1 second");
break;
case SHT4X_LOW_HEATER_1S:
Serial.println("Low heat for 1 second");
break;
case SHT4X_LOW_HEATER_100MS:
Serial.println("Low heat for 0.1 second");
break;
}
Serial.println("Adafruit SHT4x Initialization Completed");
}
void WZ_Init() {
Serial.println("WZ Initializing...");
WzSoftSerial.begin(9600);
wz.passiveMode();
Serial.println("WZ Initialization Completed");
}
void ENS160_Init() {
Serial.println("ENS160 Initializing...");
ens160.begin();
Serial.println(ens160.available() ? "done." : "failed!");
if (ens160.available()) {
// Print ENS160 versions
Serial.print("\tRev: ");
Serial.print(ens160.getMajorRev());
Serial.print(".");
Serial.print(ens160.getMinorRev());
Serial.print(".");
Serial.println(ens160.getBuild());
Serial.print("\tStandard mode ");
Serial.println(ens160.setMode(ENS160_OPMODE_STD) ? "done." : "failed!");
}
Serial.println("ENS160 Initialization Completed");
}
void PMS_Init() {
Serial.println("PMS7003 Initializing...");
Serial1.begin(9600);
pms.passiveMode();
Serial.println("PMS7003 Initialization Completed");
}
void SCD41_Init() {
Serial.println("SCD41 Initializing...");
uint16_t error;
char errorMessage[256];
scd4x.begin(Wire);
// stop potentially previously started measurement
error = scd4x.stopPeriodicMeasurement();
if (error) {
Serial.print("Error trying to execute stopPeriodicMeasurement(): ");
errorToString(error, errorMessage, 256);
Serial.println(errorMessage);
}
uint16_t serial0;
uint16_t serial1;
uint16_t serial2;
error = scd4x.getSerialNumber(serial0, serial1, serial2);
if (error) {
Serial.print("Error trying to execute getSerialNumber(): ");
errorToString(error, errorMessage, 256);
Serial.println(errorMessage);
} else {
printSerialNumber(serial0, serial1, serial2);
}
// Start Measurement
error = scd4x.startPeriodicMeasurement();
if (error) {
Serial.print("Error trying to execute startPeriodicMeasurement(): ");
errorToString(error, errorMessage, 256);
Serial.println(errorMessage);
}
Serial.println("SCD41 Initialization Completed");
}
void printUint16Hex(uint16_t value) {
Serial.print(value < 4096 ? "0" : "");
Serial.print(value < 256 ? "0" : "");
Serial.print(value < 16 ? "0" : "");
Serial.print(value, HEX);
}
void printSerialNumber(uint16_t serial0, uint16_t serial1, uint16_t serial2) {
Serial.print("Serial: 0x");
printUint16Hex(serial0);
printUint16Hex(serial1);
printUint16Hex(serial2);
Serial.println();
}
```
arduino_mqtt.h
``` c++
// MQTT服务链接
#define MQTT_BROKER_ADDR "emqx.inversedesign.net" // 这里输入你的mqtt服务器地址
#define MQTT_BROKER_PORT 1883
#define MQTT_BROKER_USERNAME "aiaq"
#define MQTT_BROKER_PASSWORD "aiaq"
```
arduino_secrets.h
``` c++
// 双引号中输入你的 WIFI 账号密码
#define SECRET_STA_SSID ""
#define SECRET_STA_PASS ""
```
#### 6. 视频演示
[localvideo]ecd254ffff57c0fc6221bfab607a4ced[/localvideo]
## 总结
通过本次活动,尝试了自己绘制PCB板、打样、焊接。对贴片元件焊接也初步上手。虽然过程还是很艰难。焊废了几块板子,之前竟敢挑战焊接0201的电阻。也是险些看瞎了眼儿了。通过本次活动对Arduino开发板以及Arduino IDE有了基本了解,后续在学习开发板有了更多的选择。希望能多多参与学习活动,也再次希望Follow me活动越办越好。
-
上传了资料:
【Follow me第二季第2期】智能家庭空气质量监测仪
-
加入了学习《Follow me 第二季第2期任务提交》,观看 【得捷电子Follow me】提交视频
-
加入了学习《【Follow me第二季第2期】Arduino UNO R4 WiF》,观看 【Follow me第二季第2期】Arduino UNO R4 WiF
-
加入了学习《FollowMe 第二季:2 - Arduino UNO R4 Wi-Fi 及任务讲解》,观看 Arduino UNO R4 Wi-Fi 及任务讲解
- 2024-09-21
-
加入了学习《直播回放: FollowMe 3 与得捷一起解锁开发板的超能力》,观看 FollowMe 3 与得捷一起解锁开发板的超能力
-
加入了学习《FollowMe 第二季: 1 Adafruit Circuit Playground Express及任务讲解》,观看 Adafruit Circuit Playground Express 及任务讲解
- 2024-02-18
-
回复了主题帖:
【得捷电子Follow me第4期】成果展示汇总帖
Jacktang 发表于 2024-2-18 07:33
用杜邦线来连接DS3231和屏幕也是一样的正常显示,,,
嗯 我索性就全部用杜邦线连接了 ,当时咋没想到DS3231可以跟屏幕插在一块
- 2024-02-17
-
发表了主题帖:
【得捷电子Follow me第4期】成果展示汇总帖
**首先感谢 DigiKey得捷 | 电子工程世界EEWorld 举办的Follow me活动,与得捷电子一起解锁开发板的超能力!**
# 前言
**龙年新春到,福气满天飘。愿所有看到此贴的人事业如龙腾飞跃,财源似龙脉绵长。家庭和睦如龙凤呈祥,身体健康赛龙马精神。祝你在新的一年里,龙运亨通,万事如意!**:Onion-54: :Onion-54: :Onion-54:
# 项目介绍
本项目包含以下内容:
入门任务:开发环境搭建,BLINK,驱动液晶显示器进行显示(没有则串口HelloWorld)
搭配器件: [W5500-EVB-Pico](https://www.digikey.cn/zh/products/detail/wiznet/W5500-EVB-PICO/16515824)、 [Adafruit Sharp Memory Display Breakout](https://www.digikey.cn/zh/products/detail/adafruit-industries-llc/3502/7386264)
基础任务一:完成主控板W5500初始化(静态IP配置),并能使用局域网电脑ping通,同时W5500可以ping通互联网站点;通过抓包软件(Wireshark、Sniffer等)抓取本地PC的ping报文,展示并分析。
搭配器件: [W5500-EVB-Pico](https://www.digikey.cn/zh/products/detail/wiznet/W5500-EVB-PICO/16515824)、 [Adafruit Sharp Memory Display Breakout](https://www.digikey.cn/zh/products/detail/adafruit-industries-llc/3502/7386264)
基础任务二:主控板建立TCPIP或UDP服务器,局域网PC使用TCPIP或UDP客户端进行连接并发送数据,主控板接收到数据后,送液晶屏显示(没有则通过串口打印显示);通过抓包软件抓取交互报文,展示并分析。(TCP和UDP二选一,或者全都操作)
搭配器件: [W5500-EVB-Pico](https://www.digikey.cn/zh/products/detail/wiznet/W5500-EVB-PICO/16515824)、 [Adafruit Sharp Memory Display Breakout](https://www.digikey.cn/zh/products/detail/adafruit-industries-llc/3502/7386264)
进阶任务:从NTP服务器(注意数据交互格式的解析)同步时间,获取时间送显示屏(串口)显示。
搭配器件: [W5500-EVB-Pico](https://www.digikey.cn/zh/products/detail/wiznet/W5500-EVB-PICO/16515824)、 [Adafruit Sharp Memory Display Breakout](https://www.digikey.cn/zh/products/detail/adafruit-industries-llc/3502/7386264)
终极任务(二选一)
■ **终极任务一:**访问 [https://www.digikey.cn/zh/resources/api-solutions](https://www.digikey.cn/zh/resources/api-solutions),以了解得捷(DigiKey)数字化解决方案及其API操作,设计一款DigiKey电子元器件价格及库存监视器,能实时同步并显示指定,电子元器件的价格、库存等信息。
■ **终极任务二:**使用外部存储器,组建简易FTP文件服务器,并能正常上传下载文件。
搭配器件: [W5500-EVB-Pico](https://www.digikey.cn/zh/products/detail/wiznet/W5500-EVB-PICO/16515824)、 [Adafruit Sharp Memory Display Breakout](https://www.digikey.cn/zh/products/detail/adafruit-industries-llc/3502/7386264)
本项目视频及源码:
- 视频 [【得捷Follow me第4期】+ 任务成果视频展示](https://training.eeworld.com.cn/video/39268)
- 源码 [【得捷Follow me第4期】+ 任务成果代码展示](https://download.eeworld.com.cn/detail/shazhongjin/631134)
# 开箱展示
购买的配件有:
[W5500-EVB-Pico](https://www.digikey.cn/zh/products/detail/wiznet/W5500-EVB-PICO/16515824)
[MICROSD CARD BFF QT PY/XIAO|](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103100142/13688265)
[Pico LCD 1.14](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103030400/14317043)
[Pico RTC DS3231](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103030398/14317036)
开箱全家福:
# 任务成果展示及说明
## 入门任务
开发环境搭建,BLINK,驱动液晶显示器进行显示(没有则串口HelloWorld)
### 一、硬件介绍
| 硬件 | 链接、资料 | 图片 |
| -------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------- |
| W5500-EVB-Pico | [W5500-EVB-PICO WIZnet 开发板 套件 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/wiznet/W5500-EVB-PICO/16515824) [W5500-EVB-Pico WIZnet Document System](https://docs.wiznet.io/Product/iEthernet/W5500/w5500-evb-pico) | ![](https://docs.wiznet.io/assets/images/w5500_evb_pico_side-da676c5d9c41adedc0469b9f1810b81b.png) |
| Pico LCD 1.14 | [103030400 Seeed Technology Co., Ltd 开发板 套件 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103030400/14317043) [Pico LCD 1.14 - Waveshare Wiki](https://www.waveshare.com/wiki/Pico-LCD-1.14) | ![](https://www.waveshare.com/media/catalog/product/cache/1/image/800x800/9df78eab33525d08d6e5fb8d27136e95/p/i/pico-lcd-1.14-2_4.jpg) |
### 二、搭建开发环境
本项目使用MicroPython进行开发。
1. 下载 Wiznet W5500-EVB-Pico MicroPython固件 [MicroPython - Python for microcontrollers](https://micropython.org/download/W5500_EVB_PICO/)
2. 按住核心板的boot键并连接数据线到电脑,或者已连接电脑状态下按住boot键再按下Run(reset)键。然后将下载的固件应复制到出现的 USB 大容量存储设备中,新固件将自动写入并复位。
3. 将Wiznet W5500-EVB-Pico焊接排针,Pico LCD 1.14 显示模块与Wiznet W5500-EVB-Pico进行连接。需要注意的是核心板焊接排针的方向及与显示模块的针脚的对应。
### 三、代码展示
/beginner_task_code.py
``` python
import LCD_1inch14,time
from machine import Pin,SPI
led = Pin(25, Pin.OUT)
if __name__=='__main__':
lcd = LCD_1inch14.LCD()
lcd.WriteLine('Follow Me 4')
lcd.WriteLine('by shazhongjin')
lcd.WriteLine('Hello World!')
while True:
led.value(1)
lcd.WriteLine("LED ON")
time.sleep(1)
led.value(0)
lcd.WriteLine("LED OFF")
time.sleep(1)
```
本项目使用到的LCD_1inch14库为根据微雪例程 [Demo codes](https://files.waveshare.com/upload/2/28/Pico_code.7z) , 屏幕显示参考Follow me 2中Adafruit ESP32-S3 TFT Feather 开发板 刷入CircuitPython的屏幕显示效果来对此库进行调整。设计思路如下:
项目中所有用到屏幕的任务均使用该库,后续不在提及。
/lib/LCD_1inch14.py
``` python
from machine import Pin,SPI,PWM
import framebuf,time
BL = 13
DC = 8
RST = 12
MOSI = 11
SCK = 10
CS = 9
Row = 1
class LCD(framebuf.FrameBuffer):
def __init__(self):
self.width = 240
self.height = 135
self.cs = Pin(CS,Pin.OUT)
self.rst = Pin(RST,Pin.OUT)
self.cs(1)
self.spi = SPI(1)
self.spi = SPI(1,1000_000)
self.spi = SPI(1,10000_000,polarity=0, phase=0,sck=Pin(SCK),mosi=Pin(MOSI),miso=None)
self.dc = Pin(DC,Pin.OUT)
self.dc(1)
self.buffer = bytearray(self.height * self.width * 2)
super().__init__(self.buffer, self.width, self.height, framebuf.RGB565)
self.init_display()
self.red = 0x07E0
self.green = 0x001f
self.blue = 0xf800
self.white = 0xffff
self.black = 0x0000
def write_cmd(self, cmd):
self.cs(1)
self.dc(0)
self.cs(0)
self.spi.write(bytearray([cmd]))
self.cs(1)
def write_data(self, buf):
self.cs(1)
self.dc(1)
self.cs(0)
self.spi.write(bytearray([buf]))
self.cs(1)
def init_display(self):
"""Initialize dispaly"""
self.rst(1)
self.rst(0)
self.rst(1)
self.write_cmd(0x36)
self.write_data(0x70)
self.write_cmd(0x3A)
self.write_data(0x05)
self.write_cmd(0xB2)
self.write_data(0x0C)
self.write_data(0x0C)
self.write_data(0x00)
self.write_data(0x33)
self.write_data(0x33)
self.write_cmd(0xB7)
self.write_data(0x35)
self.write_cmd(0xBB)
self.write_data(0x19)
self.write_cmd(0xC0)
self.write_data(0x2C)
self.write_cmd(0xC2)
self.write_data(0x01)
self.write_cmd(0xC3)
self.write_data(0x12)
self.write_cmd(0xC4)
self.write_data(0x20)
self.write_cmd(0xC6)
self.write_data(0x0F)
self.write_cmd(0xD0)
self.write_data(0xA4)
self.write_data(0xA1)
self.write_cmd(0xE0)
self.write_data(0xD0)
self.write_data(0x04)
self.write_data(0x0D)
self.write_data(0x11)
self.write_data(0x13)
self.write_data(0x2B)
self.write_data(0x3F)
self.write_data(0x54)
self.write_data(0x4C)
self.write_data(0x18)
self.write_data(0x0D)
self.write_data(0x0B)
self.write_data(0x1F)
self.write_data(0x23)
self.write_cmd(0xE1)
self.write_data(0xD0)
self.write_data(0x04)
self.write_data(0x0C)
self.write_data(0x11)
self.write_data(0x13)
self.write_data(0x2C)
self.write_data(0x3F)
self.write_data(0x44)
self.write_data(0x51)
self.write_data(0x2F)
self.write_data(0x1F)
self.write_data(0x1F)
self.write_data(0x20)
self.write_data(0x23)
self.write_cmd(0x21)
self.write_cmd(0x11)
self.write_cmd(0x29)
# 初始化内容
Row = 1
self.fill(0x0000)
self.text("MicroPython",20,4,0xffff)
self.fill_rect(1,1,3,13,0xffff)
self.fill_rect(4,1,1,2,0xffff)
self.fill_rect(5,1,2,13,0xffff)
self.fill_rect(7,11,2,3,0xffff)
self.fill_rect(8,1,2,13,0xffff)
self.fill_rect(10,1,1,2,0xffff)
self.fill_rect(11,1,3,13,0xffff)
self.fill_rect(12,10,1,3,0x0000)
self.show()
def show(self):
self.write_cmd(0x2A)
self.write_data(0x00)
self.write_data(0x28)
self.write_data(0x01)
self.write_data(0x17)
self.write_cmd(0x2B)
self.write_data(0x00)
self.write_data(0x35)
self.write_data(0x00)
self.write_data(0xBB)
self.write_cmd(0x2C)
self.cs(1)
self.dc(1)
self.cs(0)
self.spi.write(self.buffer)
self.cs(1)
def Clean(self):
self.init_display()
def WriteLine(self, s : str):
import math
global Row
#print(f'print string is : {s}')
length = len(s)
#print(f'string length is : {length}')
rownum= math.ceil(length / 30)
#print(f'string rows : {rownum}')
for i in range(rownum):
i += 1
print(s[30 * (i - 1) :30 * i])
# 渲染头部
self.fill_rect(0,0,350,15,0x0000)
self.text("MicroPython",20,4,0xffff)
self.fill_rect(1,1,3,13,0xffff)
self.fill_rect(4,1,1,2,0xffff)
self.fill_rect(5,1,2,13,0xffff)
self.fill_rect(7,11,2,3,0xffff)
self.fill_rect(8,1,2,13,0xffff)
self.fill_rect(10,1,1,2,0xffff)
self.fill_rect(11,1,3,13,0xffff)
self.fill_rect(12,10,1,3,0x0000)
# 当i大于12行时屏幕开始滚动
#print(f'screen rows : {Row}')
if (Row > 10):
self.scroll(0,-1 * 12)
self.fill_rect(0,124,350, 10 ,0x0000)
# 渲染头部
self.fill_rect(0,0,350,15,0x0000)
self.text("MicroPython",20,4,0xffff)
self.fill_rect(1,1,3,13,0xffff)
self.fill_rect(4,1,1,2,0xffff)
self.fill_rect(5,1,2,13,0xffff)
self.fill_rect(7,11,2,3,0xffff)
self.fill_rect(8,1,2,13,0xffff)
self.fill_rect(10,1,1,2,0xffff)
self.fill_rect(11,1,3,13,0xffff)
self.fill_rect(12,10,1,3,0x0000)
if (Row < 10):
self.text(s[30 * (i - 1) :30 * i], 0 , 15 + (Row-1) * 12 + 2 ,0xffff);
else:
self.text(s[30 * (i - 1) :30 * i], 0 , 15 + (10-1) * 12 + 2 ,0xffff);
Row += 1
self.show()
#print('\n')
```
### 四、演示
[localvideo]479d9fdcb8e023da04f4ed99d0a71679[/localvideo]
---
参考资料:
[W5500-EVB-Pico | WIZnet Document System](https://docs.wiznet.io/Product/iEthernet/W5500/w5500-evb-pico)
[Pico LCD 1.14 - Waveshare Wiki](https://www.waveshare.com/wiki/Pico-LCD-1.14)
## 基础任务一
完成主控板W5500初始化(静态IP配置),并能使用局域网电脑ping通,同时W5500可以ping通互联网站点;通过抓包软件(Wireshark、Sniffer等)抓取本地PC的ping报文,展示并分析。
### 一、W5500初始化并配置静态IP
根据WiZnet官方例程,配置静态IP先要查询当前网络网关(比如当前网络网关为192.168.1.1),使用`nic.ifconfig(('IP','子网掩码','网关','DNS'))`来配置w5500的静态ip地址。如下例程:
``` python
from machine import Pin,SPI
spi=SPI(0,2_000_000, mosi=Pin(19),miso=Pin(16),sck=Pin(18))
nic = network.WIZNET5K() #spi,cs,reset pin # network.WIZNET5K(spi,Pin(17),Pin(20))
nic.active(True)
# 设置动态ip
#nic.ifconfig('dhcp')
# 设置静态ip
nic.ifconfig(('192.168.1.107','255.255.255.0','192.168.1.1','8.8.8.8'))
while not nic.isconnected():
time.sleep(1)
print(nic.ifconfig())
```
### 二、使用局域网电脑ping通W5500-EVB-Pico,并使用Wireshark抓包ping报文
ping命令通常被用来测试网络连接,可以帮助你确定电脑是否能够通过IP地址访问另一台电脑。当你执行ping命令时,它会发送一个小数据包到特定的IP地址上,并等待响应。如果连接成功,你会看到回复的时间以及数据包是否成功送达。
运行ping命令 地址192.168.1.108
双击数据表列表,查看数据包各层详细信息。
互联网层IP包头部信息
传输层ICMP协议信息
### 三、使用W5500-EVB-Pico ping通局域网中的电脑
在gitee中找到一个uping的仓库,可以实现像电脑中的Ping命令一样在开发板中运行ping命令。由于该库中将ping信息输出到控制台上。再此也是做了小小的改动将信息输出到屏幕上,详见下节代码展示。
### 四、代码展示
/basic_task1_code.py
``` python
from machine import Pin,SPI,RTC
import time,network,uping
import LCD_1inch14
#W5x00 chip init
def w5x00_init():
spi=SPI(0,2_000_000, mosi=Pin(19),miso=Pin(16),sck=Pin(18))
nic = network.WIZNET5K() #spi,cs,reset pin # spi,Pin(17),Pin(20)
nic.active(True)
# If you use the Dynamic IP(DHCP), you must use the "nic.ifconfig('dhcp')".
#nic.ifconfig('dhcp')
# If you use the Static IP, you must use the "nic.ifconfig("IP","subnet","Gateway","DNS")".
nic.ifconfig(('192.168.1.108','255.255.255.0','192.168.1.1','8.8.8.8'))
while not nic.isconnected():
time.sleep(1)
#print(nic.regs())
print(nic.ifconfig())
if __name__ == "__main__":
lcd = LCD_1inch14.LCD()
lcd.WriteLine('Follow Me 4')
lcd.WriteLine('by shazhongjin')
lcd.WriteLine('base task 1')
w5x00_init()
# 使用W5500 ping互联网站点 www.baidu.com
ping = uping.Ping('www.baidu.com',COUNT=100,IsOutputScreen =True)
ping.start()
```
/lib/uping.py
``` python
'''
Author: Yogile
Gitee: https://gitee.com/yogile
Date: 2022-07-16 17:41:38
LastEditors: Yogile
LastEditTime: 2022-07-16 18:04:28
Fork from: https://github.com/coffee-it/uPing
Description: Porting code to ESP32 chips
'''
import utime
import uselect
import uctypes
import usocket
import ustruct
import urandom
import micropython
import LCD_1inch14
urandom.seed(utime.ticks_us())
class Ping():
"""
Create the ping calculating object exemplar
"""
def __init__(self, HOST, SOURCE=None, COUNT=4, INTERVAL=1000, SIZE=64, TIMEOUT=5000, quiet=False, IsOutputScreen = False):
self.HOST = HOST
self.COUNT = COUNT
self.TIMEOUT = TIMEOUT
self.INTERVAL = INTERVAL
self.SIZE = SIZE
self.quiet = quiet
self.END = None
self.IsOutputScreen = IsOutputScreen
# prepare packet
assert SIZE >= 16, "pkt size too small"
self._PKT = b'Q'*SIZE
self.PKT_DESC = {
"type": uctypes.UINT8 | 0,
"code": uctypes.UINT8 | 1,
"checksum": uctypes.UINT16 | 2,
"id": uctypes.UINT16 | 4,
"seq": uctypes.INT16 | 6,
"timestamp": uctypes.UINT64 | 8,
} # packet header descriptor
h = uctypes.struct(uctypes.addressof(self._PKT), self.PKT_DESC, uctypes.BIG_ENDIAN)
h.type = 8 # ICMP_ECHO_REQUEST
h.code = 0
h.checksum = 0
h.id = urandom.getrandbits(16)
h.seq = 1
self.h = h
# init socket
sock = usocket.socket(usocket.AF_INET, usocket.SOCK_RAW, 1)
if SOURCE:
src_addr = usocket.getaddrinfo(SOURCE, 1)[0][-1] # ip address
sock.bind(src_addr)
sock.setblocking(0)
sock.settimeout(TIMEOUT/1000)
addresses = usocket.getaddrinfo(HOST, 1) # [0][-1] # list of ip addresses
assert addresses, "Can not take the IP address of host"
self.CLIENT_IP = None
for addr in addresses:
try:
sock.connect(addr[-1])
self.CLIENT_IP = addr[-1][0]
except:
continue
assert self.CLIENT_IP, "Connection failed"
self.sock = sock
# [ COUNTERS ]
self.seq_num = 1 # Next sequence number
self.transmitted = 0
self.received = 0
self.seqs = None
# LCD
self.LCD = LCD_1inch14.LCD()
def Output(self,msg :str):
print(msg)
if self.IsOutputScreen:
self.LCD.WriteLine(msg)
def start(self):
"""
Starting a ping cycle with the specified settings (like a interval, count e.t.c.)
"""
t = self.INTERVAL
finish = False
# [ Rtt metrics ]
pongs = []
min_rtt, max_rtt = None, None
# [ Start over ]
self.seq_num = 1
self.transmitted = 0
self.received = 0
not self.quiet and self.Output("PING %s (%s): %u data bytes" % (self.HOST, self.CLIENT_IP, len(self._PKT)))
if self.seqs:
self.seqs.extend(list(range(self.seq_num, self.COUNT + 1))) # [seq_num, seq_num + 1, ...., seq_num + n])
else:
self.seqs = list(range(self.seq_num, self.COUNT + 1)) # [1,2,...,count]
# Здесь нужно подвязаться на реальное время
while self.seq_num = self.INTERVAL:
pong = self.ping()
t = 0
rtt = pong[1]
if rtt:
pongs.append(rtt)
if not min_rtt or rtt = max_rtt: max_rtt = round(rtt, 3)
if len(self.seqs) == 0:
finish = True
if finish:
break
utime.sleep_ms(1)
t += 1
losses = round((self.transmitted - self.received) / self.transmitted) * 100
avg_rtt = round(sum(pongs) / len(pongs), 3) if pongs else None
from ucollections import namedtuple
_result = namedtuple("result", ("tx", "rx", "losses", "min", "avg", "max"))
result = _result(self.transmitted, self.received, losses, min_rtt, avg_rtt, max_rtt)
if not self.quiet:
self.Output(r'%u packets transmitted, %u packets received, %u packet loss' % (self.transmitted, self.received, losses))
if avg_rtt: self.Output(r'round-trip min/avg/max = %r/%r/%r ms' % (min_rtt, avg_rtt, max_rtt))
else:
return result
def ping(self):
"""
Send ping manually.
Returns sequense number(int), round-trip time (ms, float), ttl
"""
sock = self.sock
if not self.seqs:
self.seqs = []
self.seqs.append(self.seq_num)
seq, t_elasped, ttl = None, None, None
# header
h = self.h
h.checksum = 0
h.seq = self.seq_num
h.timestamp = utime.ticks_us()
h.checksum = self.checksum(self._PKT)
try:
# send packet
if sock.send(self._PKT) == self.SIZE:
self.transmitted += 1
else:
self.seqs.remove(self.seq_num)
self.seq_num += 1
# recv packet
while 1:
resp = sock.recv(self.SIZE + 20) # ICMP header and payload + IP header
resp_mv = memoryview(resp)
h2 = uctypes.struct(uctypes.addressof(resp_mv[20:]), self.PKT_DESC, uctypes.BIG_ENDIAN)
seq = h2.seq
if h2.type==0 and h2.id==h.id and (seq in self.seqs): # 0: ICMP_ECHO_REPLY
t_elasped = (utime.ticks_us()-h2.timestamp) / 1000
self.seqs.remove(seq)
if h2.checksum == self.checksum(resp[24:]): # except IP header and a part of ICMP header (type, code, checksum)
ttl = ustruct.unpack('!B', resp_mv[8:9])[0] # time-to-live
self.received += 1
not self.quiet and self.Output("%u bytes from %s: icmp_seq=%u, ttl=%u, time=%f ms" % (len(resp[12:]), self.CLIENT_IP, seq, ttl, t_elasped))
break
else:
not self.quiet and self.Output("Payload checksum doesnt match")
t_elasped = None
break
except Exception as identifier:
import errno
if identifier.args[0] == errno.EPIPE:
self.Output("Client connection unexpectedly closed")
pass
elif identifier.args[0] == errno.EBADF:
self.Output("Bad file descriptor.")
pass
else:
raise identifier
return (seq, t_elasped, ttl)
async def ping_async(self):
"""
Send ping manually by async.
Returns sequense number(int), round-trip time (ms, float), ttl
"""
sock = self.sock
if not self.seqs:
self.seqs = []
self.seqs.append(self.seq_num)
seq, t_elasped, ttl = None, None, None
# header
h = self.h
h.checksum = 0
h.seq = self.seq_num
h.timestamp = utime.ticks_us()
h.checksum = self.checksum(self._PKT)
try:
# send packet
if sock.send(self._PKT) == self.SIZE:
self.transmitted += 1
else:
self.seqs.remove(self.seq_num)
self.seq_num += 1
# recv packet
while 1:
resp = sock.recv(self.SIZE + 20) # ICMP header and payload + IP header
resp_mv = memoryview(resp)
h2 = uctypes.struct(uctypes.addressof(resp_mv[20:]), self.PKT_DESC, uctypes.BIG_ENDIAN)
seq = h2.seq
if h2.type==0 and h2.id==h.id and (seq in self.seqs): # 0: ICMP_ECHO_REPLY
t_elasped = (utime.ticks_us()-h2.timestamp) / 1000
self.seqs.remove(seq)
if h2.checksum == self.checksum(resp[24:]): # except IP header and a part of ICMP header (type, code, checksum)
ttl = ustruct.unpack('!B', resp_mv[8:9])[0] # time-to-live
self.received += 1
not self.quiet and self.Output("%u bytes from %s: icmp_seq=%u, ttl=%u, time=%f ms" % (len(resp[12:]), self.CLIENT_IP, seq, ttl, t_elasped))
break
else:
not self.quiet and self.Output("Payload checksum doesnt match")
t_elasped = None
break
except Exception as identifier:
import errno
if identifier.args[0] == errno.EPIPE:
self.Output("Client connection unexpectedly closed")
pass
elif identifier.args[0] == errno.EBADF:
self.Output("Bad file descriptor.")
pass
else:
raise identifier
self.END = (seq, t_elasped, ttl)
def checksum(self, data):
if len(data) & 0x1: # Odd number of bytes
data += b'\0'
cs = 0
for pos in range(0, len(data), 2):
b1 = data[pos]
b2 = data[pos + 1]
cs += (b1 = 0x10000:
cs = (cs & 0xffff) + (cs >> 16)
cs = ~cs & 0xffff
return cs
def getEND_async(self):
"""
get ping_async() result
"""
return self.END
def __enter__(self):
return self
def __exit__(self, type, value, traceback):
self.close()
def close(self):
self.sock.close()
```
### 五、演示
[localvideo]13056f04db15d23721687675e57b6838[/localvideo]
[localvideo]4724f024b7b39bf014110a9840f301d5[/localvideo]
---
参考资料:
[Wiznet/RP2040-HAT-MicroPython (github.com)](https://github.com/Wiznet/RP2040-HAT-MicroPython)
[uPing: 使用 MicroPython 适配 ESP32 的 ping 函数,支持异步。 (gitee.com)](https://gitee.com/Yogile/uPing)
## 基础任务二
主控板建立TCPIP或UDP服务器,局域网PC使用TCPIP或UDP客户端进行连接并发送数据,主控板接收到数据后,送液晶屏显示(没有则通过串口打印显示);通过抓包软件抓取交互报文,展示并分析。(TCP和UDP二选一,或者全都操作)
### 一、硬件介绍
| 硬件 | 链接、资料 | 图片 |
| ---- | ---- | ---- |
| W5500-EVB-Pico | [W5500-EVB-PICO WIZnet 开发板 套件 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/wiznet/W5500-EVB-PICO/16515824) [W5500-EVB-Pico WIZnet Document System](https://docs.wiznet.io/Product/iEthernet/W5500/w5500-evb-pico) | ![](https://docs.wiznet.io/assets/images/w5500_evb_pico_side-da676c5d9c41adedc0469b9f1810b81b.png) |
| GROVE SHIELD FOR PI PICO V1.0 | [103100142 Seeed Technology Co., Ltd 开发板 套件 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103100142/13688265) | ![](https://mm.digikey.com/Volume0/opasdata/d220001/medias/images/3764/MFG_103100142.jpg) |
| Grove - AHT20 I2C Industrial Grade Temperature&Humidity SensorF QT PY/XIAO | [101990644 Seeed Technology Co., Ltd 开发板 套件 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/101990644/11681294) [Grove - AHT20 I2C Industrial Grade Temperature&Humidity Sensor Seeed Studio Wiki](https://wiki.seeedstudio.com/Grove-AHT20-I2C-Industrial-Grade-Temperature&Humidity-Sensor/) | ![](https://files.seeedstudio.com/wiki/Grove-AHT20_I2C_Industrial_Grade_Temperature_and_Humidity_Sensor/101990644_4_.png) |
### 二、实现功能
本项目使用microdot来实现webapi服务器,来控制GPIO设备以及发送和接收数据。
1. 使用API来控制板载LED灯的开关;
2. 使用API获得Grove - AHT20设备的温度与湿度信息;
3. 使用API来实现一个聊天室的功能;
### 三、抓包分析
使用Wireshark软件对里聊天过程进行抓包分析,点击发送消息时向服务端发送一个Post请求将文本框中的内容发送给服务端。如下图所示可以看到数据包Info中 一个POST方法 路径为/send-message。通过查看Hypertext Transfer Protocol(应用层的信息)包括请求方法、请求路径、请求的完整路径等信息。在Javascript object Notation:application/json Json数据信息可以看到发送的内容“follow me4”
下图为客户端接收消息的数据包,可以看到Hypertext Transfer Protocol(应用层的信息)返回的200状态码,以及Json数据中返回的信息“Server received: follow me4”。
### 三、代码展示
/basic_task2_code.py
``` python
import network,os,time
from usocket import socket
from machine import Pin,SPI,SoftSPI
from microdot import Microdot
app = Microdot()
led = Pin(25, Pin.OUT)
addr = ''
#w5500 初始化
def w5x00_init():
spi=SPI(0,2_000_000, mosi=Pin(19),miso=Pin(16),sck=Pin(18))
nic = network.WIZNET5K(spi,Pin(17),Pin(20)) #spi,cs,reset pin # network.WIZNET5K(spi,Pin(17),Pin(20))
nic.active(True)
# If you use the Dynamic IP(DHCP), you must use the "nic.ifconfig('dhcp')".
nic.ifconfig('dhcp')
# If you use the Static IP, you must use the "nic.ifconfig("IP","subnet","Gateway","DNS")".
#nic.ifconfig(('192.168.2.107','255.255.255.0','192.168.2.1','8.8.8.8'))
while not nic.isconnected():
time.sleep(1)
#print(nic.regs())
print(nic.ifconfig())
# Get connection IP
global addr
addr = nic.ifconfig()[0]
def get_temp_humidity(debug = False):
import ahtx0
from machine import I2C,SPI
i2c = I2C(0, scl=Pin(9), sda=Pin(8))
# 获取传感器对象
sensor = ahtx0.AHT20(i2c)
if debug:
print("\nTemperature: %0.2f C" % sensor.temperature)
print("Humidity: %0.2f %%" % sensor.relative_humidity)
return sensor.temperature,sensor.relative_humidity
def app_init():
@app.route('/')
def index(request):
return 'Hello, world!'
# 开灯
@app.route('/ledon', methods=['GET'])
def ledon(request):
print("LED ON")
led.value(1)
return 'LED ON'
# 关灯
@app.route('/ledoff', methods=['GET'])
def ledoff(request):
print("LED OFF")
led.value(0)
return 'LED OFF'
# 返回一次当前温度和湿度
@app.route('/temp-humidity')
def temp_humidity(request):
temperature, humidity = get_temp_humidity()
return {'temperature': temperature, 'humidity': humidity}
# 通过页面更新持续返回当前温度和湿度
@app.route('/temp-humidity2')
def temp_humidity(request):
from microdot import send_file
return send_file('/page/Temperature and Humidity.html')
# 聊天室
@app.route('/chat')
def send_message(request):
from microdot import send_file
return send_file('/page/ChatRoom.html')
@app.route('/send-message', methods=['POST'])
def send_message(request):
message = request.json.get('message', '')
# 处理消息,例如,在这里你可以调用其他函数来响应不同的命令或消息
print(f'received sessage: {message}')
response_message = 'Server received: ' + message
return {'message': response_message}
# 404页
@app.errorhandler(404)
def not_found(request):
return {'error': 'resource not found'}, 404
app.run(host=addr, port=5000, debug=False, ssl=None)
if __name__ == "__main__":
w5x00_init()
app_init()
```
/page/ChatRoom.html
``` html
Chat Room
#chatBox {
height: 300px;
overflow: auto;
background: #f0f0f0;
padding: 15px;
display: flex;
flex-direction: column;
}
.message {
padding: 5px 10px;
margin: 5px;
border-radius: 5px;
max-width: 80%;
}
.user-message {
align-self: flex-end;
background-color: #dcf8c6;
}
.server-message {
align-self: flex-start;
background-color: #fff;
}
function sendMessage() {
var input = document.getElementById('messageInput');
var message = input.value.trim();
if(message) {
displayMessage(message, 'user-message'); // 显示用户消息
input.value = ''; // 清空输入框
fetch('/send-message', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({message: message})
}).then(function(response) {
return response.json();
}).then(function(data) {
displayMessage(data.message, 'server-message'); // 显示服务端消息
});
}
}
function displayMessage(text, className) {
var chatBox = document.getElementById('chatBox');
var messageElem = document.createElement('div');
messageElem.textContent = text;
messageElem.classList.add('message', className);
chatBox.appendChild(messageElem);
chatBox.scrollTop = chatBox.scrollHeight; // 滚动到最新消息
}
Chat Room
Follow me 4 by shazhongjin
Send
```
/page/Temperature and Humidity.html
``` html
Temperature and Humidity
function fetchTempHumidity() {
fetch('/temp-humidity').then(function(response) {
return response.json();
}).then(function(data) {
document.getElementById('temperature').textContent = data.temperature;
document.getElementById('humidity').textContent = data.humidity;
});
}
// 每秒执行一次fetchTempHumidity函数
setInterval(fetchTempHumidity, 1000);
Temperature: --
Humidity: --
```
### 四、演示
[localvideo]eae6acf9bf12349e9820963e59ee1ab2[/localvideo]
---
参考资料:
[Installation — Microdot documentation](https://microdot.readthedocs.io/en/v1/intro.html)
## 进阶任务
从NTP服务器(注意数据交互格式的解析)同步时间,获取时间送显示屏(串口)显示。
### 一、硬件介绍
| 硬件 | 链接、资料 | 图片 |
| ----------------------------- | ---- | ---- |
| W5500-EVB-Pico | [W5500-EVB-PICO WIZnet 开发板 套 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/wiznet/W5500-EVB-PICO/16515824) [W5500-EVB-Pico WIZnet Document System](https://docs.wiznet.io/Product/iEthernet/W5500/w5500-evb-pico) | ![](https://docs.wiznet.io/assets/images/w5500_evb_pico_side-da676c5d9c41adedc0469b9f1810b81b.png) |
| Pico RTC DS3231 | [103030398 Seeed Technology Co., Ltd 开发板 套件 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103030398/14317036) [Pico RTC DS3231 - Waveshare Wiki](https://www.waveshare.com/wiki/Pico-RTC-DS3231) | ![](https://www.waveshare.com/media/catalog/product/cache/1/image/800x800/9df78eab33525d08d6e5fb8d27136e95/p/i/pico-rtc-ds3231-1_4.jpg) |
| Pico LCD 1.14 | [103030400 Seeed Technology Co., Ltd 开发板 套件 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103030400/14317043) [Pico LCD 1.14 - Waveshare Wiki](https://www.waveshare.com/wiki/Pico-LCD-1.14) | ![](https://www.waveshare.com/media/catalog/product/cache/1/image/800x800/9df78eab33525d08d6e5fb8d27136e95/p/i/pico-lcd-1.14-2_4.jpg) |
接线图1
接线图2
**Pico RTC DS3231**
Pico-RTC-DS3231 是专为 Raspberry Pi Pico 设计的 RTC 扩展模块。它集成了高精度RTC芯片DS3231,并使用I2C总线进行通信。由于采用可堆叠设计,可以连接更多的外部传感器。
- 标准树莓派Pico接头,支持树莓派Pico系列。
- 板载高精度RTC芯片DS3231,带备用电池座。
- 实时时钟可计算秒、分、小时、月、月、星期几和年份,闰年补偿有效期至 2100 年。
- 可选格式:24 小时或 12 小时,带 AM/PM 指示器。
- 2 x 可编程闹钟。
- 提供在线文档(Raspberry Pi、Pico、C/C++ 和 MicroPython 示例演示)。
![](https://www.waveshare.com/w/upload/4/40/Pico-RTC-DS3231-details-inter.jpg)
至于为什么会使用DS3231呢?但是主要想搭配这屏幕一起叠高高。一看引脚排列就傻眼了 使用引脚GPIO20、21。GPIO16-21都被w5500使用,所以没办法只能杜邦线来连接DS3231以及屏幕了。
### 二、驱动RTC ds3231
这里使用了微雪示例代码 ds3231.py ,对ds3231设置时间。
``` python
#!/usr/bin/python
# -*- coding: utf-8 -*-
from machine import Pin, I2C
import time
import binascii
# the first version use i2c1
#I2C_PORT = 1
#I2C_SDA = 6
#I2C_SCL = 7
# the new version use i2c0,if it dont work,try to uncomment the line 14 and comment line 17
# it should solder the R3 with 0R resistor if want to use alarm function,please refer to the Sch file on waveshare Pico-RTC-DS3231 wiki
# https://www.waveshare.net/w/upload/0/08/Pico-RTC-DS3231_Sch.pdf
I2C_PORT = 0
I2C_SDA = 20
I2C_SCL = 21
ALARM_PIN = 3
class ds3231(object):
# 13:45:00 Mon 24 May 2021
# the register value is the binary-coded decimal (BCD) format
# sec min hour week day month year
NowTime = b'\x00\x45\x13\x02\x24\x05\x21'
w = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];
address = 0x68
start_reg = 0x00
alarm1_reg = 0x07
control_reg = 0x0e
status_reg = 0x0f
def __init__(self,i2c_port,i2c_scl,i2c_sda):
self.bus = I2C(i2c_port,scl=Pin(i2c_scl),sda=Pin(i2c_sda))
def set_time(self,new_time):
hour = new_time[0] + new_time[1]
minute = new_time[3] + new_time[4]
second = new_time[6] + new_time[7]
week = "0" + str(self.w.index(new_time.split(",",2)[1])+1)
year = new_time.split(",",2)[2][2] + new_time.split(",",2)[2][3]
month = new_time.split(",",2)[2][5] + new_time.split(",",2)[2][6]
day = new_time.split(",",2)[2][8] + new_time.split(",",2)[2][9]
now_time = binascii.unhexlify((second + " " + minute + " " + hour + " " + week + " " + day + " " + month + " " + year).replace(' ',''))
#print(binascii.unhexlify((second + " " + minute + " " + hour + " " + week + " " + day + " " + month + " " + year).replace(' ','')))
#print(self.NowTime)
self.bus.writeto_mem(int(self.address),int(self.start_reg),now_time)
def read_time(self):
t = self.bus.readfrom_mem(int(self.address),int(self.start_reg),7)
a = t[0]&0x7F #second
b = t[1]&0x7F #minute
c = t[2]&0x3F #hour
d = t[3]&0x07 #week
e = t[4]&0x3F #day
f = t[5]&0x1F #month
print("20%x/%02x/%02x %02x:%02x:%02x %s" %(t[6],t[5],t[4],t[2],t[1],t[0],self.w[t[3]-1]))
def set_alarm_time(self,alarm_time):
# init the alarm pin
self.alarm_pin = Pin(ALARM_PIN,Pin.IN,Pin.PULL_UP)
# set alarm irq
self.alarm_pin.irq(lambda pin: print("alarm1 time is up"), Pin.IRQ_FALLING)
# enable the alarm1 reg
self.bus.writeto_mem(int(self.address),int(self.control_reg),b'\x05')
# convert to the BCD format
hour = alarm_time[0] + alarm_time[1]
minute = alarm_time[3] + alarm_time[4]
second = alarm_time[6] + alarm_time[7]
date = alarm_time.split(",",2)[2][8] + alarm_time.split(",",2)[2][9]
now_time = binascii.unhexlify((second + " " + minute + " " + hour + " " + date).replace(' ',''))
# write alarm time to alarm1 reg
self.bus.writeto_mem(int(self.address),int(self.alarm1_reg),now_time)
if __name__ == '__main__':
rtc = ds3231(I2C_PORT,I2C_SCL,I2C_SDA)
rtc.set_time('13:45:50,Monday,2021-05-24')
rtc.read_time()
rtc.set_alarm_time('13:45:55,Monday,2021-05-24')
```
### 三、代码展示
advanced_task_code.py
``` python
import network,time,LCD_1inch14,ds3231
from machine import Pin,SPI
addr = ''
#w5500 初始化
def w5x00_init():
spi=SPI(0,2_000_000, mosi=Pin(19),miso=Pin(16),sck=Pin(18))
nic = network.WIZNET5K() #spi,cs,reset pin # network.WIZNET5K(spi,Pin(17),Pin(20))
nic.active(True)
# If you use the Dynamic IP(DHCP), you must use the "nic.ifconfig('dhcp')".
nic.ifconfig('dhcp')
# If you use the Static IP, you must use the "nic.ifconfig("IP","subnet","Gateway","DNS")".
#nic.ifconfig(('192.168.1.108','255.255.255.0','192.168.1.1','8.8.8.8'))
while not nic.isconnected():
time.sleep(1)
#print(nic.regs())
print(nic.ifconfig())
# Get connection IP
global addr
addr = nic.ifconfig()[0]
def sync_ntp():
import ntptime,machine,time
I2C_PORT = 1
I2C_SDA = 26
I2C_SCL = 27
weekday = ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"];
print("start sync ntp time")
# 使用DS3231RTC
rtc = ds3231.ds3231(I2C_PORT,I2C_SCL,I2C_SDA)
try:
ntptime.host = 'ntp1.aliyun.com' # 可选,ntp服务器,默认是"pool.ntp.org" 这里使用阿里服务器
ntptime.settime() # 修改设备时间,到这就已经设置好了
sysrtc = machine.RTC()
localtime_now=time.time()+8*3600
localtime_now=time.localtime(localtime_now)
sysrtc.datetime((localtime_now[0],localtime_now[1],localtime_now[2],localtime_now[6],localtime_now[3],localtime_now[4],localtime_now[5],localtime_now[7]))
year, month, day, weekday, hours, minutes, seconds = sysrtc.datetime()[0:7]
# 构造24小时制格式的时间字符串,确保小时、分钟和秒都是两位数
time_str = "{:02d}:{:02d}:{:02d}".format(hours, minutes, seconds)
# 构造日期字符串
date_str = "{:04d}-{:02d}-{:02d}".format(year, month, day)
# 星期的字典
weekdays = {
0: "Monday",
1: "Tuesday",
2: "Wednesday",
3: "Thursday",
4: "Friday",
5: "Saturday",
6: "Sunday"
}
# 获取星期几
weekday_str = weekdays.get(weekday, "")
# 设置DS3231RTC时间
rtc.set_time(time_str + "," + weekday_str + "," + date_str)
print("success sync ntp time")
except Exception as e:
print("error sync ntp time",repr(e))
if __name__ == "__main__":
# 初始化网络
w5x00_init()
# 同步ntp时间
sync_ntp()
# 初始化LCD
LCD = LCD_1inch14.LCD()
rtc = ds3231.ds3231(1,27,26)
while True:
print(f'The SystemRTC time is : {time.localtime()[0]}-{time.localtime()[1]}-{time.localtime()[2]} {time.localtime()[3]}:{time.localtime()[4]}:{time.localtime()[5]} The DS3231RTC time is : {rtc.read_time()[0]}-{rtc.read_time()[1]}-{rtc.read_time()[2]} {rtc.read_time()[3]}:{rtc.read_time()[4]}:{rtc.read_time()[5]} {rtc.read_time()[6]}')
LCD.WriteLine(f'The SystemRTC time is : {time.localtime()[0]}-{time.localtime()[1]}-{time.localtime()[2]} {time.localtime()[3]}:{time.localtime()[4]}:{time.localtime()[5]} The DS3231RTC time is : {rtc.read_time()[0]}-{rtc.read_time()[1]}-{rtc.read_time()[2]} {rtc.read_time()[3]}:{rtc.read_time()[4]}:{rtc.read_time()[5]} {rtc.read_time()[6]}')
LCD.Clean()
```
/lib/ds3231.py 来自于参考资料连接中微雪例程中文件未做改动,也可本项目提供的源码。
### 四、演示
[localvideo]915fdcc6a16dc5368d25ef04b69e5388[/localvideo]
---
参考资料:
[Pico RTC DS3231 - Waveshare Wiki](https://www.waveshare.com/wiki/Pico-RTC-DS3231)
## 终极任务二
■ **终极任务二:**使用外部存储器,组建简易FTP文件服务器,并能正常上传下载文件。
### 一、硬件介绍
本项目中使用到的硬件有:
| 硬件 | 链接、资料 | 图片 |
| ----------------------------- | ---- | ---- |
| W5500-EVB-Pico | [W5500-EVB-PICO WIZnet 开发板 套件 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/wiznet/W5500-EVB-PICO/16515824) [W5500-EVB-Pico WIZnet Document System](https://docs.wiznet.io/Product/iEthernet/W5500/w5500-evb-pico) | ![](https://docs.wiznet.io/assets/images/w5500_evb_pico_side-da676c5d9c41adedc0469b9f1810b81b.png) |
| GROVE SHIELD FOR PI PICO V1.0 | [103100142 Seeed Technology Co., Ltd 开发板 套件 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103100142/13688265) | ![](https://mm.digikey.com/Volume0/opasdata/d220001/medias/images/3764/MFG_103100142.jpg) |
| MICROSD CARD BFF QT PY/XIAO | [5683 Adafruit Industries LLC 开发板 套件 编程器 DigiKey](https://www.digikey.cn/zh/products/detail/adafruit-industries-llc/5683/18073185) [Overview Adafruit microSD Card BFF Adafruit Learning System](https://learn.adafruit.com/adafruit-microsd-card-bff) | ![](https://cdn-learn.adafruit.com/guides/cropped_images/000/003/748/medium640/5683-00.jpg?1676318485) |
接线图1
接线图2
### 二、设计思路
1. 首先我们需要使用W5500-EVB-Pico连接到网络中。
2. 将sd卡挂载到根目录。
#### 读取SDCard
1. 点击包管理工具,安装sdcard库如下图所示。
2. 使用代码来挂载sd卡。
``` python
import os
from sdcard import SDCard
from machine import Pin,SPI,SoftSPI
spi = SPI(1,2_000_000,sck=Pin(10), mosi=Pin(11), miso=Pin(12))
#spi = SoftSPI(2_000_000,sck=Pin(10), mosi=Pin(11), miso=Pin(12))
# 获取sdcard对象
sd = SDCard(spi, Pin(13))
# 挂载SD卡到/sd目录
os.mount(sd, '/sd')
```
#### 实现FTP文件服务器
造轮子是不可能的这辈子都不可能,既然不造轮子在github上查找下有没有MicroPython FTP库,还真有来自[robert-hh](https://github.com/robert-hh)大神的[FTP-Server-for-ESP8266-ESP32-and-PYBD](https://github.com/robert-hh/FTP-Server-for-ESP8266-ESP32-and-PYBD/tree/master)库。使用库中的uftpd.py文件,该函数使用network.WLAN来获得连接信息。但本项目使用的是w5500控制器来实现网络连接,还需要对start函数稍加小改动。
``` python
# start listening for ftp connections on port 21
def start(port=21, verbose=0, splash=True):
global ftpsockets, datasocket
global verbose_l
global client_list
global client_busy
alloc_emergency_exception_buf(100)
verbose_l = verbose
client_list = []
client_busy = False
for interface in [network.AP_IF, network.STA_IF]:
wlan = network.WLAN(interface)
if not wlan.active():
continue
ifconfig = wlan.ifconfig()
addr = socket.getaddrinfo(ifconfig[0], port)
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(addr[0][4])
sock.listen(1)
sock.setsockopt(socket.SOL_SOCKET,
_SO_REGISTER_HANDLER,
lambda s : accept_ftp_connect(s, ifconfig[0]))
ftpsockets.append(sock)
if splash:
print("FTP server started on {}:{}".format(ifconfig[0], port))
datasocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
datasocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
datasocket.bind(('0.0.0.0', _DATA_PORT))
datasocket.listen(1)
datasocket.settimeout(10)
def restart(port=21, verbose=0, splash=True):
stop()
sleep_ms(200)
start(port, verbose, splash)
```
改动思路:
1. 在uftpd.py 的 start函数中,将WLAN改为WIZNET5K,从WIZNET5K对象中获得网络连接信息。
``` python
# start listening for ftp connections on port 21
def start(port=21, verbose=0, splash=True):
global ftpsockets, datasocket
global verbose_l
global client_list
global client_busy
alloc_emergency_exception_buf(100)
verbose_l = verbose
client_list = []
client_busy = False
nic = network.WIZNET5K()
if not nic.active():
continue
ifconfig = nic.ifconfig()
addr = socket.getaddrinfo(ifconfig[0], port)
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(addr[0][4])
sock.listen(1)
sock.setsockopt(socket.SOL_SOCKET,
_SO_REGISTER_HANDLER,
lambda s : accept_ftp_connect(s, ifconfig[0]))
ftpsockets.append(sock)
if splash:
print("FTP server started on {}:{}".format(ifconfig[0], port))
datasocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
datasocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
datasocket.bind(('0.0.0.0', _DATA_PORT))
datasocket.listen(1)
datasocket.settimeout(10)
def restart(port=21, verbose=0, splash=True):
stop()
sleep_ms(200)
start(port, verbose, splash)
```
修改后在执行过程中一直无法成功创建FTP服务,经过分析找到了问题的原因。当在uftpd.py文件中再此执行 `network.WIZNET5K()` 时似乎他创建了一个新的nic对象,而不是使用 `network.WLAN()` 时返回的是当前的网络连接对象。所以在判断 `not nic.active()` 结果永远为True。程序无法继续运行下去。
2. 不妨换个思路在uftpd.start函数中获得网络对象的目的为获得当前网络连接分配的IP地址。干脆让start函数传入ip参数。这样程序就能顺利执行。也不会卡在`network.WIZNET5K()`这个问题上了。
``` python
# start listening for ftp connections on port 21
def start(host='0.0.0.0',port=21, verbose=0, splash=True):
global ftpsockets, datasocket
global verbose_l
global client_list
global client_busy
alloc_emergency_exception_buf(100)
verbose_l = verbose
client_list = []
client_busy = False
addr = socket.getaddrinfo(host, port)
sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(addr[0][4])
sock.listen(1)
sock.setsockopt(socket.SOL_SOCKET,
_SO_REGISTER_HANDLER,
lambda s : accept_ftp_connect(s,host))
ftpsockets.append(sock)
if splash:
print("FTP server started on {}:{}".format(host, port))
datasocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
datasocket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
datasocket.bind(('0.0.0.0', _DATA_PORT))
datasocket.listen(1)
datasocket.settimeout(10)
def restart(host='0.0.0.0',port=21, verbose=0, splash=True):
stop()
sleep_ms(200)
start(port, verbose, splash)
```
### 三、代码展示
/ultimate_task2_code.py
``` python
import network,time
from machine import Pin,SPI
addr = ''
#w5500 初始化
def w5x00_init():
spi=SPI(0,2_000_000, mosi=Pin(19),miso=Pin(16),sck=Pin(18))
nic = network.WIZNET5K(spi,Pin(17),Pin(20)) #spi,cs,reset pin # network.WIZNET5K(spi,Pin(17),Pin(20))
nic.active(True)
# If you use the Dynamic IP(DHCP), you must use the "nic.ifconfig('dhcp')".
nic.ifconfig('dhcp')
# If you use the Static IP, you must use the "nic.ifconfig("IP","subnet","Gateway","DNS")".
#nic.ifconfig(('192.168.2.107','255.255.255.0','192.168.2.1','8.8.8.8'))
while not nic.isconnected():
time.sleep(1)
#print(nic.regs())
print(nic.ifconfig())
# Get connection IP
global addr
addr = nic.ifconfig()[0]
def sdcard_init(path='/sd'):
import os
from sdcard import SDCard
from machine import Pin,SPI,SoftSPI
spi = SPI(1,2_000_000,sck=Pin(10), mosi=Pin(11), miso=Pin(12))
#spi = SoftSPI(2_000_000,sck=Pin(10), mosi=Pin(11), miso=Pin(12))
# 获取sdcard对象
sd = SDCard(spi, Pin(13))
# 挂载SD卡到/sd目录
os.mount(sd, path)
print(f'success mounted sdcard in \'{path}\'')
if __name__ == "__main__":
# 初始化网络
w5x00_init()
# 初始化并挂在sd卡
sdcard_init()
import uftpd
uftpd.start(host = addr,port = 21,verbose = 0)
```
/lib/uftp.py
``` python
#
# Small ftp server for ESP8266 Micropython
# Based on the work of chrisgp - Christopher Popp and pfalcon - Paul Sokolovsky
#
# The server accepts passive mode only. It runs in background.
# Start the server with:
#
# import uftpd
# uftpd.start([port = 21][, verbose = level])
#
# port is the port number (default 21)
# verbose controls the level of printed activity messages, values 0, 1, 2
#
# Copyright (c) 2016 Christopher Popp (initial ftp server framework)
# Copyright (c) 2016 Paul Sokolovsky (background execution control structure)
# Copyright (c) 2016 Robert Hammelrath (putting the pieces together and a
# few extensions)
# Copyright (c) 2020 Jan Wieck Use separate FTP servers per socket for STA + AP mode
# Copyright (c) 2021 JD Smith Use a preallocated buffer and improve error handling.
# Distributed under MIT License
#
import socket
import network
import uos
import gc
import sys
import errno
from time import sleep_ms, localtime
from micropython import alloc_emergency_exception_buf
# constant definitions
_CHUNK_SIZE = const(1024)
_SO_REGISTER_HANDLER = const(20)
_COMMAND_TIMEOUT = const(300)
_DATA_TIMEOUT = const(100)
_DATA_PORT = const(13333)
# Global variables
ftpsockets = []
datasocket = None
client_list = []
verbose_l = 0
client_busy = False
# Interfaces: (IP-Address (string), IP-Address (integer), Netmask (integer))
_month_name = ("", "Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec")
class FTP_client:
def __init__(self, ftpsocket, local_addr):
self.command_client, self.remote_addr = ftpsocket.accept()
self.remote_addr = self.remote_addr[0]
self.command_client.settimeout(_COMMAND_TIMEOUT)
log_msg(1, "FTP Command connection from:", self.remote_addr)
self.command_client.setsockopt(socket.SOL_SOCKET,
_SO_REGISTER_HANDLER,
self.exec_ftp_command)
self.command_client.sendall("220 Hello, this is the {}.\r\n".format(sys.platform))
self.cwd = '/'
self.fromname = None
# self.logged_in = False
self.act_data_addr = self.remote_addr
self.DATA_PORT = 20
self.active = True
self.pasv_data_addr = local_addr
def send_list_data(self, path, data_client, full):
try:
for fname in uos.listdir(path):
data_client.sendall(self.make_description(path, fname, full))
except Exception as e: # path may be a file name or pattern
path, pattern = self.split_path(path)
try:
for fname in uos.listdir(path):
if self.fncmp(fname, pattern):
data_client.sendall(
self.make_description(path, fname, full))
except:
pass
def make_description(self, path, fname, full):
global _month_name
if full:
stat = uos.stat(self.get_absolute_path(path, fname))
file_permissions = ("drwxr-xr-x"
if (stat[0] & 0o170000 == 0o040000)
else "-rw-r--r--")
file_size = stat[6]
tm = stat[7] & 0xffffffff
tm = localtime(tm if tm < 0x80000000 else tm - 0x100000000)
if tm[0] != localtime()[0]:
description = "{} 1 owner group {:>10} {} {:2} {:>5} {}\r\n".\
format(file_permissions, file_size,
_month_name[tm[1]], tm[2], tm[0], fname)
else:
description = "{} 1 owner group {:>10} {} {:2} {:02}:{:02} {}\r\n".\
format(file_permissions, file_size,
_month_name[tm[1]], tm[2], tm[3], tm[4], fname)
else:
description = fname + "\r\n"
return description
def send_file_data(self, path, data_client):
buffer = bytearray(_CHUNK_SIZE)
mv = memoryview(buffer)
with open(path, "rb") as file:
bytes_read = file.readinto(buffer)
while bytes_read > 0:
data_client.write(mv[0:bytes_read])
bytes_read = file.readinto(buffer)
data_client.close()
def save_file_data(self, path, data_client, mode):
buffer = bytearray(_CHUNK_SIZE)
mv = memoryview(buffer)
with open(path, mode) as file:
bytes_read = data_client.readinto(buffer)
while bytes_read > 0:
file.write(mv[0:bytes_read])
bytes_read = data_client.readinto(buffer)
data_client.close()
def get_absolute_path(self, cwd, payload):
# Just a few special cases "..", "." and ""
# If payload start's with /, set cwd to /
# and consider the remainder a relative path
if payload.startswith('/'):
cwd = "/"
for token in payload.split("/"):
if token == '..':
cwd = self.split_path(cwd)[0]
elif token != '.' and token != '':
if cwd == '/':
cwd += token
else:
cwd = cwd + '/' + token
return cwd
def split_path(self, path): # instead of path.rpartition('/')
tail = path.split('/')[-1]
head = path[:-(len(tail) + 1)]
return ('/' if head == '' else head, tail)
# compare fname against pattern. Pattern may contain
# the wildcards ? and *.
def fncmp(self, fname, pattern):
pi = 0
si = 0
while pi < len(pattern) and si < len(fname):
if (fname[si] == pattern[pi]) or (pattern[pi] == '?'):
si += 1
pi += 1
else:
if pattern[pi] == '*': # recurse
if pi == len(pattern.rstrip("*?")): # only wildcards left
return True
while si < len(fname):
if self.fncmp(fname[si:], pattern[pi + 1:]):
return True
else:
si += 1
return False
else:
return False
if pi == len(pattern.rstrip("*")) and si == len(fname):
return True
else:
return False
def open_dataclient(self):
if self.active: # active mode
data_client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
data_client.settimeout(_DATA_TIMEOUT)
data_client.connect((self.act_data_addr, self.DATA_PORT))
log_msg(1, "FTP Data connection with:", self.act_data_addr)
else: # passive mode
data_client, data_addr = datasocket.accept()
log_msg(1, "FTP Data connection with:", data_addr[0])
return data_client
def exec_ftp_command(self, cl):
global datasocket
global client_busy
global my_ip_addr
try:
gc.collect()
try:
data = cl.readline().decode("utf-8").rstrip("\r\n")
except OSError:
# treat an error as QUIT situation.
data = ""
if len(data) > 8, _DATA_PORT % 256))
self.active = False
elif command == "PORT":
items = payload.split(",")
if len(items) >= 6:
self.act_data_addr = '.'.join(items[:4])
if self.act_data_addr == "127.0.1.1":
# replace by command session addr
self.act_data_addr = self.remote_addr
self.DATA_PORT = int(items[4]) * 256 + int(items[5])
cl.sendall('200 OK\r\n')
self.active = True
else:
cl.sendall('504 Fail\r\n')
elif command == "LIST" or command == "NLST":
if payload.startswith("-"):
option = payload.split()[0].lower()
path = self.get_absolute_path(
self.cwd, payload[len(option):].lstrip())
else:
option = ""
try:
data_client = self.open_dataclient()
cl.sendall("150 Directory listing:\r\n")
self.send_list_data(path, data_client,
command == "LIST" or 'l' in option)
cl.sendall("226 Done.\r\n")
data_client.close()
except:
cl.sendall('550 Fail\r\n')
if data_client is not None:
data_client.close()
elif command == "RETR":
try:
data_client = self.open_dataclient()
cl.sendall("150 Opened data connection.\r\n")
self.send_file_data(path, data_client)
# if the next statement is reached,
# the data_client was closed.
data_client = None
cl.sendall("226 Done.\r\n")
except:
cl.sendall('550 Fail\r\n')
if data_client is not None:
data_client.close()
elif command == "STOR" or command == "APPE":
try:
data_client = self.open_dataclient()
cl.sendall("150 Opened data connection.\r\n")
self.save_file_data(path, data_client,
"wb" if command == "STOR" else "ab")
# if the next statement is reached,
# the data_client was closed.
data_client = None
cl.sendall("226 Done.\r\n")
except:
cl.sendall('550 Fail\r\n')
if data_client is not None:
data_client.close()
elif command == "SIZE":
try:
cl.sendall('213 {}\r\n'.format(uos.stat(path)[6]))
except:
cl.sendall('550 Fail\r\n')
elif command == "MDTM":
try:
tm=localtime(uos.stat(path)[8])
cl.sendall('213 {:04d}{:02d}{:02d}{:02d}{:02d}{:02d}\r\n'.format(*tm[0:6]))
except:
cl.sendall('550 Fail\r\n')
elif command == "STAT":
if payload == "":
cl.sendall("211-Connected to ({})\r\n"
" Data address ({})\r\n"
" TYPE: Binary STRU: File MODE: Stream\r\n"
" Session timeout {}\r\n"
"211 Client count is {}\r\n".format(
self.remote_addr, self.pasv_data_addr,
_COMMAND_TIMEOUT, len(client_list)))
else:
cl.sendall("213-Directory listing:\r\n")
self.send_list_data(path, cl, True)
cl.sendall("213 Done.\r\n")
elif command == "DELE":
try:
uos.remove(path)
cl.sendall('250 OK\r\n')
except:
cl.sendall('550 Fail\r\n')
elif command == "RNFR":
try:
# just test if the name exists, exception if not
uos.stat(path)
self.fromname = path
cl.sendall("350 Rename from\r\n")
except:
cl.sendall('550 Fail\r\n')
elif command == "RNTO":
try:
uos.rename(self.fromname, path)
cl.sendall('250 OK\r\n')
except:
cl.sendall('550 Fail\r\n')
self.fromname = None
elif command == "CDUP" or command == "XCUP":
self.cwd = self.get_absolute_path(self.cwd, "..")
cl.sendall('250 OK\r\n')
elif command == "RMD" or command == "XRMD":
try:
uos.rmdir(path)
cl.sendall('250 OK\r\n')
except:
cl.sendall('550 Fail\r\n')
elif command == "MKD" or command == "XMKD":
try:
uos.mkdir(path)
cl.sendall('250 OK\r\n')
except:
cl.sendall('550 Fail\r\n')
elif command == "SITE":
try:
exec(payload.replace('\0','\n'))
cl.sendall('250 OK\r\n')
except:
cl.sendall('550 Fail\r\n')
else:
cl.sendall("502 Unsupported command.\r\n")
# log_msg(2,
# "Unsupported command {} with payload {}".format(command,
# payload))
except OSError as err:
if verbose_l > 0:
log_msg(1, "Exception in exec_ftp_command:")
sys.print_exception(err)
if err.errno in (errno.ECONNABORTED, errno.ENOTCONN):
close_client(cl)
# handle unexpected errors
except Exception as err:
log_msg(1, "Exception in exec_ftp_command: {}".format(err))
# tidy up before leaving
client_busy = False
def log_msg(level, *args):
global verbose_l
if verbose_l >= level:
print(*args)
# close client and remove it from the list
def close_client(cl):
cl.setsockopt(socket.SOL_SOCKET, _SO_REGISTER_HANDLER, None)
cl.close()
for i, client in enumerate(client_list):
if client.command_client == cl:
del client_list
break
def accept_ftp_connect(ftpsocket, local_addr):
# Accept new calls for the server
try:
client_list.append(FTP_client(ftpsocket, local_addr))
except:
log_msg(1, "Attempt to connect failed")
# try at least to reject
try:
temp_client, temp_addr = ftpsocket.accept()
temp_client.close()
except:
pass
def num_ip(ip):
items = ip.split(".")
return (int(items[0])
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**首先感谢 DigiKey得捷 | 电子工程世界EEWorld 举办的Follow me活动,与得捷电子一起解锁开发板的超能力!**
# 前言
大家好啊,我是沙忠金,一名不务正业的电子爱好者。很荣幸又一次入围了Follow me 第三期活动,在第二期的活动中体会到了开发板的快乐,真的对小巧精致且带有屏幕的有着不可抵抗的吸引力。
# 项目介绍
本项目包含以下内容:
**任务1**:使用MicroPython系统(必做任务)
熟悉Seeed Studio XIAO ESP32C3开发板基本操作,安装esptool,并给开发板刷写MicroPython系统,完成入门程序的运行
搭配器件:[Seeed Studio XIAO ESP32C3](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/113991054/16652880)
**任务2**:驱动扩展板上的OLED屏幕(必做任务)
使用扩展板上的OLED屏幕显示文字和图形
搭配器件:[Seeed Studio XIAO ESP32C3](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/113991054/16652880)、[Seeed Studio Expansion Board Base for XIAO](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103030356/13572081)
**任务3**:控制蜂鸣器播放音乐(必做任务)
使用Seeed Studio XIAO ESP32C3控制蜂鸣器发出不同频率的声音,并播放一段音乐
搭配器件:[Seeed Studio XIAO ESP32C3](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/113991054/16652880)、[Seeed Studio Expansion Board Base for XIAO](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103030356/13572081)
**任务4**:连接WiFi网络(必做任务)
将Seeed Studio XIAO ESP32C3连接到WiFi网络,并访问互联网信息
搭配器件:[Seeed Studio XIAO ESP32C3](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/113991054/16652880)、[Seeed Studio Expansion Board Base for XIAO](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103030356/13572081)、[RF ANT 2.4GHZ/5.5GHZ PCB TRACE](https://www.digikey.cn/zh/products/detail/laird-connectivity-inc/MAF94264/2392214)
**任务5**:使用外部传感器(必做任务)
连接环境光传感器或温湿度传感器,获取传感器的数值,并转换成真实的物理量
搭配器件: [Seeed Studio XIAO ESP32C3](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/113991054/16652880)、[Seeed Studio Expansion Board Base for XIAO](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/103030356/13572081)、 [Grove - AHT20 I2C Industrial Grade Temperature and Humidity Sensor](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/101990644/11681294)、[Grove - Light Sensor v1.2](https://www.digikey.cn/zh/products/detail/seeed-technology-co-ltd/101020132/6558656)
任务6:综合实践(选做,非必做):从以下任务要求中,任选一个完成,也可以根据自己的兴趣爱好和能力特长,自定义难度相仿的任务并完成。
■ **分任务2:温湿度数据记录仪**
定时记录温湿度传感器的值,并展示出来。可记录到开发板内置存储中,也可以通过物联网服务发送数据到云端。
本项目视频及源码:
- 视频 [【得捷Follow me第3期】+ 任务成果视频展示](https://training.eeworld.com.cn/video/38572)
- 源码 [【得捷Follow me第3期】+ 任务成果代码展示](https://download.eeworld.com.cn/detail/shazhongjin/630228)
# 开箱及展示
# 任务成果展示及说明
## 任务1:使用MicroPython系统
熟悉Seeed Studio XIAO ESP32C3开发板基本操作,安装esptool,并给开发板刷写MicroPython系统,完成入门程序的运行
### 一、熟悉Seeed Studio XIAO ESP32C3 开发板
Seeed Studio XIAO ESP32C3是一款基于 Espressif ESP32-C3 Wi-Fi/蓝牙双模芯片的 IoT 迷你开发板。ESP32-C3 是一款32 位 RISC-V CPU,具有强大的计算能力,包含FPU(浮点运算单元),可进行32 位单精度运算。它具有出色的射频性能,支持IEEE 802.11 b/g/n Wi-Fi和蓝牙 5 (LE)协议。正如其名,Seeed Studio XIAO ESP32C3具有小巧精致的外形,还可通过表面贴装整合到更复杂的PCB上。
**特性**
• 强大的 CPU:ESP32-C3,32 位 RISC-V 单核处理器,运行频率高达 160 MHz
• 完整的WiFi子系统:符合IEEE 802.11b/g/n协议,支持Station模式、SoftAP模式、SoftAP+Station模式、混杂模式
• 蓝牙 LE 子系统:支持蓝牙 5 和蓝牙网状网络的功能
• 超低功耗:深度睡眠功耗约43μA
• 更好的射频性能:可连接外部射频天线
• 电池充电芯片:支持锂电池充放电管理
• 丰富的片上资源:400KB SRAM、4MB板载闪存
• 超小尺寸:小至拇指 (20x17.5mm) XIAO 系列经典外形,适用于可穿戴设备和小型项目
• 可靠的安全功能:支持 AES-128/256、哈希、RSA、HMAC、数字签名和安全启动的加密硬件加速器
• 丰富的接口:1xI2C、1xSPI、2xUART、11xGPIO(PWM)、4xADC、1xJTAG
• 单面元件布局、支持表面贴装设计
---
参考资料:
[Seeed Studio XIAO ESP32C3 官方资料](https://wiki.seeedstudio.com/XIAO_ESP32C3_Getting_Started/#hardware-overview "Getting Started with Seeed Studio XIAO ESP32C3")
### 二、下载esptool、esp32c3 MicroPython固件
1. 下载esptool工具
百度搜索esptool,选择github搜索结果。
点击Releases Version 4.6.2,进入后点击[esptool-v4.6.2-win64.zip](https://github.com/espressif/esptool/releases/download/v4.6.2/esptool-v4.6.2-win64.zip)开始下载。因为我使用的系统是windows,大家可以根据自己的操作系统来选择下载。
下载后保存待用。
2. 下载ESP32C3 MicroPython固件
百度搜索MicroPython,选择MicroPython官网搜索结果。
选择ESP32-C3,点击下载Releases v1.21.0 (2023-10-05) .bin,下载后待用。
### 三、将MicroPython刷入到Seeed Studio XIAO ESP32C3开发板中
1. 将开发板连接电脑,点击设备管理器查看开发板的端口号。
2. 在MicroPython固件和esptool所在文件夹打开powershell 或 命令行,输入命令清除闪存。
``` powershell
.\esptool.exe --chip esp32c3 --port COM3 erase_flash
```
3. 再此输入命令开始刷写固件,待提示“Hard resetting via RTS pin..”刷写成功。
``` powershell
.\esptool.exe --chip esp32c3 --port COM3 --baud 460800 write_flash -z 0x0 .\ESP32_GENERIC_C3-20231005-v1.21.0.bin
```
*COM3 为你自己电脑上开发板的端口号;*
*.\ESP32_GENERIC_C3-20231005-v1.21.0.bin 为你下载的MicroPython固件*
### 四、完成入门程序运行
1. 下载安装Thonny,这里需要安装4.1.4版本,其他版本在安装ssd1306库时会报错。
2. 选择解释器 Micropython (ESP32) and Port。
3. 进入“工具”——“管理包”,在包管理工具中搜索并安装ssd1306库。
4. 复制官方提供的 [示例](https://wiki.seeedstudio.com/XIAO_ESP32C3_MicroPython/#demo-1-light-an-oled-screen "示例") 点击运行。
---
参考资料:
[Getting Started | Seeed Studio Wiki](https://wiki.seeedstudio.com/XIAO_ESP32C3_MicroPython/#demo-1-light-an-oled-screen "Getting Started | Seeed Studio Wiki")
## 任务2:驱动扩展板上的OLED屏幕
任务要点:使用扩展板上的OLED屏幕显示文字和图形
### 一、驱动扩展板 0.96" OLED屏幕
1. 点击包管理工具,安装SSD1306 OLED库如下图所示。
2. 学习官网示例及查找SSD1306 OLED屏幕驱动的主要成员和方法。
```python
import time
from machine import Pin, SoftI2C
import ssd1306
import math
# ESP8266 Pin assignment
i2c = SoftI2C(scl=Pin(7), sda=Pin(6))
oled_width = 128
oled_height = 64
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)
oled.fill(0) # Clear the screen
oled.text("Hello, Seeder!", 10, 15)
oled.text("/////", 30, 40)
oled.text("(`3`)y", 30, 55)
oled.show() # Show the text
```
```python
# 主要从GPT上获得有部分可能无法使用。
width - 屏幕宽度,单位像素
height - 屏幕高度,单位像素
fill(color) - 用某个颜色填充整个屏幕
fill_rect(x, y, width, height, color) - 用颜色填充指定区域
pixel(x, y, color) - 设置指定坐标点的颜色
scroll(dx, dy) - 滚动显示内容
text(string, x, y, color) - 在指定位置显示文本
show() - 更新显示
invert(invert) - 反色显示
rotate(rotate) - 旋转屏幕方向
contrast(contrast) - 设置对比度
hline(x, y, width, color) - 绘制水平线
vline(x, y, height, color) - 绘制垂直线
rectangle(x1, y1, x2, y2, color) - 绘制矩形
line(x1, y1, x2, y2, color) - 绘制线段
bitmap(image, x, y, color) - 显示位图图像
draw_image_part(bitmap, x, y, start_x, start_y, end_x, end_y) - 显示图像片段
```
### 二、任务设计
本任务使用屏幕实现一个贪吃蛇小游戏,通过游戏界面展示、蛇和食物的绘制来达到本次任务学习的目的。使用核心板的BOOT Button为游戏开始按键,扩展板的User Button为贪吃蛇转弯按键。每次按下User Button蛇会顺时针旋转90°。游戏中控制蛇允许穿墙,蛇头一但撞到身体时游戏结束,并在游戏结束后统计本局游戏分数。
### 三、代码展示
```python
import time,ssd1306,math,random
from machine import Pin, SoftI2C
# ESP8266 Pin assignment
i2c = SoftI2C(scl=Pin(7), sda=Pin(6))
oled_width = 128
oled_height = 64
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)
WIDTH = 128
HEIGHT = 64
# 配置引脚
boot_pin = Pin(9, Pin.IN, Pin.PULL_UP)
move_pin = Pin(3, Pin.IN, Pin.PULL_UP)
startgame = False
endgame = False
snake_pos = [[0,0],[-1,0],[-2,0],[-3,0],[-4,0]]
food_pos = [0,0]
# 方向 0右 1下 2左 3上
direction = 0
def init_game():
spawn_food()
print("游戏开始!")
def spawn_food():
global food_pos
food_pos = [random.randint(0,WIDTH-1), random.randint(0,HEIGHT-1)]
def draw():
oled.fill(0)
for p in snake_pos:
oled.pixel(p[0], p[1], 1)
oled.pixel(*food_pos, 2)
oled.show()
def check_cross(value):
if value[0] > 128:
value[0] = 0
if value[0] < 0:
value[0] = 128
if value[1] > 64:
value[1] = 0
if value[1] < 0:
value[1] = 64
return value
def check_collision(list):
global endgame
for pos in snake_pos:
if pos == list:
endgame = True
print("游戏结束")
def move_snake():
global direction
global snake_pos
# 判断移动按钮是否被按下
if move_pin.value() == 0:
if direction == 3:
direction = 0
else:
direction = direction + 1
# 判断移动方向
if direction == 0:
new_head = [snake_pos[0][0] + 1, snake_pos[0][1]]
if direction == 1:
new_head = [snake_pos[0][0], snake_pos[0][1] + 1]
if direction == 2:
new_head = [snake_pos[0][0] - 1, snake_pos[0][1]]
if direction == 3:
new_head = [snake_pos[0][0] , snake_pos[0][1] - 1]
print(f"下一点移动坐标:{new_head}")
# 检查自身碰撞
check_collision(new_head)
snake_pos.insert(0, new_head)
snake_pos = list(map(check_cross, snake_pos))
if new_head == food_pos:
spawn_food()
else:
snake_pos.pop()
draw()
while True:
if endgame:
oled.fill(0)
oled.hline(0,0,128,1)
oled.hline(0,63,128,1)
oled.vline(0,0,64,1)
oled.vline(127,0,64,1)
oled.text("Game Over" ,30,15)
score = len(snake_pos) - 5
oled.text(f"score {score}" ,35,45)
oled.show()
else:
if not startgame:
oled.fill(0)
oled.hline(0,0,128,1)
oled.hline(0,63,128,1)
oled.vline(0,0,64,1)
oled.vline(127,0,64,1)
oled.text("Follow me 3" ,20,15)
oled.text("Snake" ,40,30)
oled.text("Press Boot" ,20,45)
oled.show()
if boot_pin.value() == 0:
startgame = True
init_game()
oled.fill(0)
oled.text("Readly ~~" ,20,30)
oled.show()
print("准备 ~~")
time.sleep(1)
oled.fill(0)
oled.text("Go !!" ,20,30)
oled.show()
print("开始 !!")
time.sleep(1)
if startgame:
print(f"蛇身体坐标:{snake_pos}" )
print(f"食物坐标:{food_pos}")
move_snake()
time.sleep(0.2)
```
### 四、演示
[localvideo]8e1932473a21ec4496f937701c3a7394[/localvideo]
## 任务3:控制蜂鸣器播放音乐
使用Seeed Studio XIAO ESP32C3控制蜂鸣器发出不同频率的声音,并播放一段音乐
### 一、驱动Buzzer(蜂鸣器)
Seeed Studio Expansion Board Base for XIAO 扩展板集成了,无源蜂鸣器可以更改 PMW 频率以发出不同的哔哔声以获得“蜂鸣器音乐”。
``` python
import machine
# 获取buzzer对象
buzzer_pin = machine.Pin(5, machine.Pin.OUT)
buzzer = machine.PWM(buzzer_pin)
# 设置声音的占空比
buzzer.duty(512)
# 设置声音频率
buzzer.freq(current_note)
# 设置时间间隔
time.sleep_ms(wait)
```
### 二、将简谱转化为简谱字符串
1. 音高转化为字符串
| 音高 | 简谱 | 字符串 |
| ------- | ---- | ------ |
| 高音 do | | `1 |
| 中音 do | 1 | 1 |
| 低音 do | | ,1 |
2. 音的时值转化为字符串
| 时值 | 简谱 | 字符串 |
| ------------ | ------------------ | --------- |
| 四分音符 | 1 | 1 |
| 二分音符 | 1 - | 1\- |
| 全音符 | 1 - - - | 1\-\-\- |
| 八分音符 | 1 | 1\_ |
| 十六分音符 | 1(双下划线) | 1\_ \_ |
| 三十二分音符 | 1(三下划线) | 1\_ \_ \_ |
| 附点四分音符 | 1· | 1\. |
| 附点八分音符 | 1· | 1\_\. |
| | 1 2 | 1\_ 2\_ |
3. 休止符转化字符串
| 休止符 | 简谱 | 字符串 |
| ------------ | ------------------ | --------- |
| 休止符 | 0 | 0 |
4. 将简谱转化为字符串
``` python
notation = "0 0 6_ 7_ | `1. 7_ `1 `3 | 7-- 3 | 6. 5_ 6 `1 | 5-- 2_ 3_ | 4. 3_ 4_ `1. | 3. 2_ 3_ `1. | 7. 5_ 5 7 | 7-- 6_ 7_ | `1. 7_ `1 `3 | 7-- 3 | 6. 5_ 6 `1 | 5-- 3_ 3_ | 4 `1_ 7. `1 | `2 `3_ `1_ `1- |`1_ 7_ 6 7 5 | 6-- `1_ `2_| `3. `2_ `3 `5 | `2-- 5 | `1. 7_ `1 `3 | `3-- 5_ 5_ | 6_ 7_ `1 7_ `1_ `2 | `1. 5_ 5- | `4 `3 `2 `1 | `3-- `3 | `6- `5- | `3_ `2 `1-- | `2 `1_ `2_ `2 `5 | `3-- `3 | `6- `5- | `3_ `2_ `1-- | `2 `1_ `2_ `2 7 | 6--- | 6--- |"
```
### 三、将简谱字符串转化为频率、时长
``` python
# 简谱字符串转化为频率、时长
# https://blog.csdn.net/qq_33015241/article/details/130160768
def translate(notation):
freq_time = [[],[]]
i = 0
j = 0
symbol = 0
scale_spacing = 0
time_counting = False
one_beat_duration = 500 # 1拍时长
time = one_beat_duration
while i < len(notation):
symbol = notation
if symbol == '|' or symbol == ' ':
i += 1
continue
if symbol == ',' or symbol == '`':
if symbol == ',':
scale_spacing = -7
elif symbol == '`':
scale_spacing = 7
if symbol >= '1' and symbol = '1' and symbol GPIO9
# MOSI -> GPIO10
# SCK -> GPIO8
# CS -> GPIO4
# 测试读取SD卡
import sdcard, os
from machine import Pin,SPI
spi = SPI(1, sck=Pin(8), mosi=Pin(10), miso=Pin(9))
# 获取sdcard对象
sd = sdcard.SDCard(spi, Pin(4))
# 挂载SD卡到/sd目录
os.mount(sd, '/sd')
f = open('/sd/hello.txt','w')
f.write('test write file to sdcard')
f.close()
print(os.listdir('/sd'))
```
3. 刷新MicroPython设备文件,查看“hello.txt”是否存在。
### 二、代码展示
```python
import os,time,ahtx0,ssd1306
from sdcard import SDCard
from machine import Pin, I2C, SoftI2C,SPI,SoftSPI
i2c = SoftI2C(scl=Pin(7), sda=Pin(6))
spi = SPI(1, sck=Pin(8), mosi=Pin(10), miso=Pin(9))
oled_width = 128
oled_height = 64
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)
# 获取传感器对象
sensor = ahtx0.AHT20(i2c)
# 扩展板按键
user_button = Pin(3, Pin.IN, Pin.PULL_UP)
# 获取sdcard对象
sd = SDCard(spi, Pin(4))
# 挂载SD卡到/sd目录
os.mount(sd, '/sd')
tempcache = []
humicache = []
show_mode = 0
# 绘制温度线
def drawTempLine(templist):
l = len(templist) - 1
x = 127
# Y 34 Is Temp 0
while l >= 0 and x >= 25:
rtemplist = list(reversed(templist))
temp = rtemplist[l]
tempy = -int(temp) + 34
oled.pixel(x,tempy,1)
x -=1
l -= 1
# 绘制湿度线
def drawHumiLine(humilist):
l = len(humilist) - 1
x = 127
# Y 34 Is Temp 0
while l >= 0 and x >= 25:
rhumilist = list(reversed(humilist))
humi = rhumilist[l]
humiy = -(55 / 100 * humi) + 55
oled.pixel(x,int(humiy),1)
x -=1
l -= 1
# 判断文件夹是否存在
def exists(path):
try:
os.stat(path)
return True
except OSError:
return False
# 写入闪存
def writeflash(t,h):
local_time = time.localtime()
print(local_time)
savepath = "/sd/Recorder"
if not exists(savepath):
os.mkdir(savepath)
with open(f"{savepath}/{local_time[0]}{local_time[1]}{local_time[2]}.txt", 'a') as file:
lines = f"{local_time[0]}-{local_time[1]}-{local_time[2]} {local_time[3]}:{local_time[4]}:{local_time[5]} 温度:{t} 湿度:{h}" + '\n'
file.write(lines)
while True:
oled.fill(0)
if user_button.value() == 0:
if show_mode == 0:
show_mode = 1
else:
show_mode = 0
print("\nTemperature: %0.2f C" % sensor.temperature)
print("Humidity: %0.2f %%" % sensor.relative_humidity)
writeflash(sensor.temperature,sensor.relative_humidity)
# show_mode 为0时显示温度
if show_mode == 0:
oled.hline(24,55,128,1)
oled.vline(24,0,56,1)
oled.text("-15",0,48,1)
oled.text(" 0",0,30,1)
oled.text("+35",0,0,1)
oled.text("T: %0.2f C" % sensor.temperature,45,57,1)
tempcache.insert(0,sensor.temperature)
drawTempLine(tempcache)
else:
oled.hline(24,55,128,1)
oled.vline(24,0,56,1)
oled.text(" 0",0,48,1)
oled.text(" 50",0,24,1)
oled.text("100",0,0,1)
oled.text("H: %0.2f %%" % sensor.relative_humidity,45,57,1)
humicache.insert(0,sensor.relative_humidity)
drawHumiLine(humicache)
oled.show()
time.sleep(1)
```
### 三、演示
[localvideo]2e1329edc8220b54fc704cd64e64e640[/localvideo]
# 总结
通过本期学习,熟悉了开发板从0开始刷入系统、使用IDE、以及了解MicroPython的使用,Thonny这个IDE在代码智能提示比较不足,也看了论坛中有其他大神使用vscode来操作开发板。这次较比上次还是很有收获的。也初步了解了开发的GPIO引脚的定义和使用。感谢 DigiKey得捷 | 电子工程世界EEWorld 举办的活动,祝活动越办越好!
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上传了资料:
【得捷Follow me第3期】+ 任务成果代码展示
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加入了学习《【得捷电子Follow me】第2期》,观看 【得捷电子Follow me】第2期
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加入了学习《【得捷电子Follow me第3期】智能家居之环境监测应用》,观看 任务5:使用外部传感器
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