回复了主题帖： 新能源汽车车载交流慢充和维修

国标上PWM好像是±电压

上传了资料： 容栅设计参考

加入了学习《Follow me Arduino UNO R4 WiFi跟我一起练》，观看 Follow me Arduino UNO R4 WiFi跟我一起练

回复了主题帖： 1.5V供电容栅卡尺测量方案

有关于容栅设计的文档吗？

加入了学习《Follow me Arduino UNO R4 WiFi跟我一起练》，观看 Follow me Arduino UNO R4 WiFi跟我一起练

回复了主题帖： 反激电源新手看过来，开源项目准备好了，是时候动手了~

se7ens 发表于 2024-9-13 13:49 动手能力强的话给家里的灯都换上LED的，这样的话电源就不浪费 体积有点大，改LED电源有点重

回复了主题帖： 反激电源新手看过来，开源项目准备好了，是时候动手了~

手里有好几只坏掉的48V开关电源，具体哪里坏了还不清楚，可以用来做点什么应用呢？

回复了主题帖： 【Follow me第二季第2期】Arduino UNO R4 WiFi跟我一起练

yangjiaxu 发表于 2024-9-11 12:01 这个模块还支持WiFi，确实不错，还用的乐鑫的ESP32，话说，这芯片是不是也要重新烧录自己的程序才行呢？还 ... 扒了下底层，用的是串口AT命令WiFiCommands.h、Modem.cpp、Modem.h

评论了课程： 【2024 DigiKey 应用说】第二期：树莓派 5 在视频直播中的应用

follow me 要上树莓派5？

回复了主题帖： 【Follow me第二季第2期】Arduino UNO R4 WiFi跟我一起练

yangjiaxu 发表于 2024-9-11 12:01 这个模块还支持WiFi，确实不错，还用的乐鑫的ESP32，话说，这芯片是不是也要重新烧录自己的程序才行呢？还 ... 这个没有深层去研究，明天扒一扒告诉你，估计是AT的，我其实是冲着ESP32参加活动的

回复了主题帖： 【Follow me第二季第2期】Arduino UNO R4 WiFi跟我一起练

lijinlei 发表于 2024-9-11 09:52 这么快搞完了，厉害 大部分Arduino都已经帮忙封装好了

回复了主题帖： 【Follow me第二季第2期】Arduino UNO R4 WiFi跟我一起练

秦天qintian0303 发表于 2024-9-11 08:37 整体结构清晰，任务完成的也很不错，HA还可以图标显示，看着不错 HA是个不错的应用，刚通过这次活动接触，不是很熟悉

发表了主题帖： 【Follow me第二季第2期】Arduino UNO R4 WiFi跟我一起练

本帖最后由 90houyidai 于 2024-11-1 23:16 编辑   Arduino UNO R4 WiFi 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。   使用到资料 • Arduino UNO R4 WiFi数据手册 • Arduino UNO R4 WiFi原理图 • Arduino UNO R4 WiFi引脚图 • RA4M1数据手册 • RA4M1硬件用户手册 • SHT40数据手册 Temp Graph with UNO R4 and SHT40 - Software Deep Dive - Hackster.io Home Assistant获取DHT11温湿度-CSDN博客   开发环境：Arduino IDE Nightly Builds 使用到的库： Adafruit_SHT4x、ArduinoMqttClient 使用到的硬件： 主板：Arduino UNO R4 WiFi（核心板） 扩展板：4885（SHT40温湿度传感器扩展板） 缆线：PRT-14426（Qwiic缆线-50mm） 简单开箱 上电后有给开机动画   视频链接：Follow me Arduino UNO R4 WiFi跟我一起练-Follow me Arduino UNO R4 WiFi跟我一起练-EEWORLD大学堂   入门任务（必做）：搭建环境并开启第一步Blink / 串口打印Hello EEWorld！ #include "Arduino_LED_Matrix.h" // the setup function runs once when you press reset or power the board void setup() { // initialize digital pin LED_BUILTIN as an output. pinMode(LED_BUILTIN, OUTPUT); Serial.begin(115200); } // the loop function runs over and over again forever void loop() { Serial.write("Hello "); digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) delay(500); // wait for a second Serial.write("EEWorld\r\n"); digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW delay(500); // wait for a second }     基础任务（必做）： 一、驱动12x8点阵LED； #include "Arduino_LED_Matrix.h" #include <stdint.h> #include "opamp.h" ArduinoLEDMatrix matrix; const uint32_t animation[][4] = { { 0x2006, 0x200200, 0x20070000, 1000 }, { 0x6009, 0x200400, 0x800f0000, 1000 }, { 0xe001, 0xe00100, 0x100e0000, 1000 } }; // the setup function runs once when you press reset or power the board void setup() { // initialize digital pin LED_BUILTIN as an output. pinMode(LED_BUILTIN, OUTPUT); Serial.begin(115200); matrix.autoscroll(2000); matrix.loadSequence(animation); matrix.begin(); // turn on autoscroll to avoid calling next() to show the next frame; the parameter is in milliseconds //matrix.autoscroll(2000); matrix.play(true); OPAMP.begin(OPAMP_SPEED_HIGHSPEED); } // the loop function runs over and over again forever void loop() { Serial.write("Hello "); digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) delay(1000); // wait for a second Serial.write("EEWorld\r\n"); digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW delay(1000); // wait for a second } 可以使用https://ledmatrix-editor.arduino.cc/生成需要的显示图形和动画       二、用DAC生成正弦波； #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 = 10; // 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 } void loop() { // Read an analog value from pin A5 and map it to a frequency range //freq = map(analogRead(A5), 0, 1024, 0, 10000); // Print the updated frequency to the serial monitor Serial.println("Frequency is now " + String(freq) + " hz"); wave.freq(freq); // Set the frequency of the waveform generator to the updated value delay(1000); // Delay for one second before repeating }     三、用OPAMP放大DAC信号； #include "Arduino_LED_Matrix.h" #include <stdint.h> #include <OPAMP.h> ArduinoLEDMatrix matrix; const uint32_t animation[][4] = { { 0x2006, 0x200200, 0x20070000, 1000 }, { 0x6009, 0x200400, 0x800f0000, 1000 }, { 0xe001, 0xe00100, 0x100e0000, 1000 } }; uint16_t sin_index; //正弦波单个周期的点数 #define POINT_NUM 32 /* 波形数据 -----------------------------------------------*/ const uint16_t Sine12bit[POINT_NUM] = { 2048 , 2460 , 2856 , 3218 , 3532 , 3786 , 3969 , 4072 , 4093 , 4031 , 3887 , 3668 , 3382 , 3042 , 2661 , 2255 , 1841 , 1435 , 1054 , 714 , 428 , 209 , 65 , 3 , 24 , 127 , 310 , 564 , 878 , 1240 , 1636 , 2048 }; // the setup function runs once when you press reset or power the board void setup() { // initialize digital pin LED_BUILTIN as an output. pinMode(LED_BUILTIN, OUTPUT); Serial.begin(115200); matrix.autoscroll(2000); matrix.loadSequence(animation); matrix.begin(); // turn on autoscroll to avoid calling next() to show the next frame; the parameter is in milliseconds //matrix.autoscroll(2000); matrix.play(true); analogWriteResolution(12);//change this write resolution up to 12-bits OPAMP.begin(OPAMP_SPEED_HIGHSPEED); } // the loop function runs over and over again forever void loop() { #if 0 Serial.write("Hello "); digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level) analogWrite(A0, 123); delay(1000); // wait for a second Serial.write("EEWorld\r\n"); digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW analogWrite(A0, 0); Serial.write("A1_input:%d\r\n",analogRead(A1)); delay(1000); // wait for a second #else analogWrite(A5, Sine12bit[sin_index++%POINT_NUM]>>2);//输出正弦波 delay(1); #endif } 四、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 #include "analogWave.h" analogWave wave(DAC); int freq = 1000; // These constants won't change. They're used to give names to the pins used: const int analogInPin = A1; // Analog input pin that the potentiometer is attached to const int analogOutPin = 9; // Analog output pin that the LED is attached to int sensorValue = 0; // value read from the pot int outputValue = 0; // value output to the PWM (analog out) void setup() { // initialize serial communications at 9600 bps: Serial.begin(115200); wave.sine(freq); } void loop() { // read the analog in value: sensorValue = analogRead(analogInPin); // map it to the range of the analog out: outputValue = map(sensorValue, 0, 1023, 0, 255); // change the analog out value: analogWrite(analogOutPin, outputValue); // print the results to the Serial Monitor: //Serial.print("sensor = "); Serial.println(sensorValue); //Serial.print("\t output = "); //Serial.println(outputValue); // wait 2 milliseconds before the next loop for the analog-to-digital // converter to settle after the last reading: delay(2); }     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） #include <ArduinoMqttClient.h> #if defined(ARDUINO_SAMD_MKRWIFI1010) || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_AVR_UNO_WIFI_REV2) #include <WiFiNINA.h> #elif defined(ARDUINO_SAMD_MKR1000) #include <WiFi101.h> #elif defined(ARDUINO_ARCH_ESP8266) #include <ESP8266WiFi.h> #elif defined(ARDUINO_PORTENTA_H7_M7) || defined(ARDUINO_NICLA_VISION) || defined(ARDUINO_ARCH_ESP32) || defined(ARDUINO_GIGA) || defined(ARDUINO_OPTA) #include <WiFi.h> #elif defined(ARDUINO_PORTENTA_C33) #include <WiFiC3.h> #elif defined(ARDUINO_UNOR4_WIFI) #include <WiFiS3.h> #endif #include "arduino_secrets.h" ///////please enter your sensitive data in the Secret tab/arduino_secrets.h char ssid[] = SECRET_SSID; // your network SSID (name) char pass[] = SECRET_PASS; // your network password (use for WPA, or use as key for WEP) // To connect with SSL/TLS: // 1) Change WiFiClient to WiFiSSLClient. // 2) Change port value from 1883 to 8883. // 3) Change broker value to a server with a known SSL/TLS root certificate // flashed in the WiFi module. WiFiClient wifiClient; MqttClient mqttClient(wifiClient); const char broker[] = "192.168.110.23";//"core-mosquitto";//"test.mosquitto.org"; int port = 1883; const char topic[] = "office/sensor_sht40"; const long interval = 1000; unsigned long previousMillis = 0; int count = 0; void setup() { //Initialize serial and wait for port to open: Serial.begin(115200); while (!Serial) { ; // wait for serial port to connect. Needed for native USB port only } // attempt to connect to WiFi network: Serial.print("Attempting to connect to WPA SSID: "); Serial.println(ssid); while (WiFi.begin(ssid, pass) != WL_CONNECTED) { // failed, retry Serial.print("."); delay(5000); } Serial.println("You're connected to the network"); Serial.println(); Serial.println(WiFi.localIP()); // You can provide a unique client ID, if not set the library uses Arduino-millis() // Each client must have a unique client ID mqttClient.setId("clientId"); // You can provide a username and password for authentication mqttClient.setUsernamePassword("uno", "uno"); Serial.print("Attempting to connect to the MQTT broker: "); Serial.println(broker); if (!mqttClient.connect(broker, port)) { Serial.print("MQTT connection failed! Error code = "); Serial.println(mqttClient.connectError()); while (1); } Serial.println("You're connected to the MQTT broker!"); Serial.println(); } void loop() { // call poll() regularly to allow the library to send MQTT keep alives which // avoids being disconnected by the broker mqttClient.poll(); // to avoid having delays in loop, we'll use the strategy from BlinkWithoutDelay // see: File -> Examples -> 02.Digital -> BlinkWithoutDelay for more info unsigned long currentMillis = millis(); if (currentMillis - previousMillis >= interval) { // save the last time a message was sent previousMillis = currentMillis; Serial.print("Sending message to topic: "); Serial.println(topic); Serial.print("temperature: "); Serial.println(count); Serial.print("humidity: "); Serial.println(count); // send message, the Print interface can be used to set the message contents mqttClient.beginMessage(topic); mqttClient.print("temperature: "); mqttClient.print(count); mqttClient.print("humidity: "); mqttClient.print(count); mqttClient.endMessage(); Serial.println(); count++; } }     扩展任务：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 #include <ArduinoMqttClient.h> #if defined(ARDUINO_SAMD_MKRWIFI1010) || defined(ARDUINO_SAMD_NANO_33_IOT) || defined(ARDUINO_AVR_UNO_WIFI_REV2) #include <WiFiNINA.h> #elif defined(ARDUINO_SAMD_MKR1000) #include <WiFi101.h> #elif defined(ARDUINO_ARCH_ESP8266) #include <ESP8266WiFi.h> #elif defined(ARDUINO_PORTENTA_H7_M7) || defined(ARDUINO_NICLA_VISION) || defined(ARDUINO_ARCH_ESP32) || defined(ARDUINO_GIGA) || defined(ARDUINO_OPTA) #include <WiFi.h> #elif defined(ARDUINO_PORTENTA_C33) #include <WiFiC3.h> #elif defined(ARDUINO_UNOR4_WIFI) #include <WiFiS3.h> #endif #include "Adafruit_SHT4x.h" #include "arduino_secrets.h" ///////please enter your sensitive data in the Secret tab/arduino_secrets.h char ssid[] = SECRET_SSID; // your network SSID (name) char pass[] = SECRET_PASS; // your network password (use for WPA, or use as key for WEP) // To connect with SSL/TLS: // 1) Change WiFiClient to WiFiSSLClient. // 2) Change port value from 1883 to 8883. // 3) Change broker value to a server with a known SSL/TLS root certificate // flashed in the WiFi module. WiFiClient wifiClient; MqttClient mqttClient(wifiClient); const char broker[] = "homeassistant.local";//"core-mosquitto";//"test.mosquitto.org"; int port = 1883; const char topic[] = "office/sensor_sht40"; const long interval = 1000; unsigned long previousMillis = 0; int count = 0; Adafruit_SHT4x sht4 = Adafruit_SHT4x(); float temperature_date,humidity_date; sensors_event_t humidity, temp; static TwoWire& SHT_I2C_INTERFACE = Wire1; // Wire1 = Uno R4 QWIIC port void setup() { //Initialize serial and wait for port to open: Serial.begin(115200); while (!Serial) { ; // wait for serial port to connect. Needed for native USB port only } Serial.println("SHT40 test"); if (! sht4.begin(&SHT_I2C_INTERFACE)) { Serial.println("Couldn't find SHT40"); while (1) delay(1); } Serial.println("Found SHT40 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; } // attempt to connect to WiFi network: Serial.print("Attempting to connect to WPA SSID: "); Serial.println(ssid); while (WiFi.begin(ssid, pass) != WL_CONNECTED) { // failed, retry Serial.print("."); delay(5000); } Serial.println("You're connected to the network"); Serial.println(); Serial.println(WiFi.localIP()); // You can provide a unique client ID, if not set the library uses Arduino-millis() // Each client must have a unique client ID mqttClient.setId("clientId"); // You can provide a username and password for authentication mqttClient.setUsernamePassword("uno", "uno"); Serial.print("Attempting to connect to the MQTT broker: "); Serial.println(broker); if (!mqttClient.connect(broker, port)) { Serial.print("MQTT connection failed! Error code = "); Serial.println(mqttClient.connectError()); while (1); } Serial.println("You're connected to the MQTT broker!"); Serial.println(); } void loop() { // call poll() regularly to allow the library to send MQTT keep alives which // avoids being disconnected by the broker mqttClient.poll(); // to avoid having delays in loop, we'll use the strategy from BlinkWithoutDelay // see: File -> Examples -> 02.Digital -> BlinkWithoutDelay for more info unsigned long currentMillis = millis(); if (currentMillis - previousMillis >= interval) { // save the last time a message was sent previousMillis = currentMillis; Serial.print("Sending message to topic: "); Serial.println(topic); // Serial.print("temperature:"); // Serial.println(temperature_date); // Serial.print("humidity: "); // Serial.println(humidity_date); uint32_t timestamp = millis(); sht4.getEvent(&humidity, &temp);// populate temp and humidity objects with fresh data timestamp = millis() - timestamp; Serial.print("Temperature: "); Serial.print(temp.temperature); Serial.println(" degrees C"); Serial.print("Humidity: "); Serial.print(humidity.relative_humidity); Serial.println("% rH"); Serial.print("Read duration (ms): "); Serial.println(timestamp); temperature_date=temp.temperature; humidity_date=humidity.relative_humidity; // send message, the Print interface can be used to set the message contents mqttClient.beginMessage(topic); mqttClient.println("{"); mqttClient.print(" \"temperature\":"); mqttClient.print(temperature_date); mqttClient.println(","); mqttClient.print(" \"humidity\":"); mqttClient.println(humidity_date); mqttClient.print("}"); mqttClient.endMessage(); Serial.println(); count+=0.01; } }     软件流程图 代码包 （4）对本活动的心得体会（包括意见或建议） 本次活动让我接触到了Home Assistant 智能家居系统，这个系统感觉功能很强大，有很多好玩的插件，值得好好探索； Arduino UNO R4 WiFi借助ESP32完成wifi操作，可玩性大大提高，MCU可以做自己的任务。 另外提个小意见，展示视频自我介绍好社恐

加入了学习《Follow me第二季第1期》，观看 创意任务三：触摸钢琴

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

加入了学习《【Follow me第二季第1期】全部任务演示》，观看 全部任务演示2.0

回复了主题帖： “传感器文旅”小调查：你比较期待哪类传感器的主题文旅？

位移传感器-LVDT，或者其他微小位移测量的传感器

加入了学习《基于STM32的数据采集系统》，观看 基于STM32的数据采集系统

加入了学习《泰克MSO6B探索营：应用案例深度解析》，观看 DDR原理及信号完整性测试

加入了学习《泰克MSO6B探索营》，观看 如何完成AI芯片电源噪声测试