[作品提交] 【Follow me第二季第2期】任务提交帖

                     串口输出程序代码：

int times = 1;
void setup() {
  // 初始化串口
  Serial.begin(9600);
}
void loop() {
  // 串口输出
  Serial.print(times);
  Serial.println(": Hello EEWorld!");
  // 计次自增
  times ++;
  // 延时1秒
  delay(1000);
}

效果：

 

#include "analogWave.h" 

analogWave wave(DAC); 

int freq = 10;

void setup() {
  Serial.begin(115200);
  wave.sine(freq);
}

void loop() {
  freq = 5000;
  Serial.println("Frequent is now " + String(freq) + " Hz");
  delay(1000);
  wave.freq(freq);
}

            程序下载后，可以用示波器看到波形：

                        也可以用ADC采集并且打印数据到串口，看到正弦波：

#include "analogWave.h"
analogWave wave(DAC);
int freq = 10;
void setup() {
  Serial.begin(115200);
  wave.sine(freq);
}

void loop() {

  // 用ADC采集并且打印数据到串口
  freq = 25;
  int sensorValue = analogRead(A0);
  // 将模拟值转换为电压值（0到5V）
  float voltage = sensorValue * (5.0 / 1023.0);
  // Print the updated frequency to the serial monitor
  Serial.println("voltage is now " + String(voltage) + " v");

  wave.freq(freq);
}

                        用OPAMP放大DAC信号：

#include <OPAMP.h>

void setup () {
  Serial.begin(9600);
  delay(2000); // serial monitor delay
  // activate OPAMP, default channel 0
  // Plus: Analog A1
  // Minus: Analog A2 
  // Output: Analog A3
  if (!OPAMP.begin(OPAMP_SPEED_HIGHSPEED)) {
    Serial.println("Failed to start OPAMP!");
  }
  bool const isRunning = OPAMP.isRunning(0);
  if (isRunning) {
    Serial.println("OPAMP running on channel 0!");
  } else {
    Serial.println("OPAMP channel 0 is not running!");
  }
}

void loop() {
    delay(10); // do nothing
}

这样就开启了运放，可以当成一个普通的运放使用，视频中可以看到R1阻值为1165Ω，R2阻值为3718欧姆，放大倍数为1.313，实际将3.3v的信号放大为了4.27v，符合预期。

import time
from adafruit_servokit import ServoKit

kit = ServoKit(channels=8)

kit.servo[0].angle = 180
kit.continuous_servo[1].throttle = 1
time.sleep(1)
kit.continuous_servo[1].throttle = -1
time.sleep(1)
kit.servo[0].angle = 0
kit.continuous_servo[1].throttle = 0

                            最后是完成Arduino UNO R4 WiF的代码：

#include <ArduinoJson.h>
#include <ArduinoJson.hpp>

#include "Arduino_LED_Matrix.h"   //Include the LED_Matrix library
#include "animation.h"            //Include animation.h header file
#include <ArduinoMqttClient.h>
#include <WiFiS3.h>
#include "mqtt_config.h"


ArduinoLEDMatrix matrix;  
char ssid[] = SECRET_SSID;    // your network SSID (name)
char pass[] = SECRET_PASS;    // your network password (use for WPA, or use as key for WEP)

WiFiClient wifiClient;
MqttClient mqttClient(wifiClient);

const char broker[] = BROKER;
int        port     = 1883;
const char pub_topic[]  = PUB_TOPIC;
const char sub_topic[]  = SUB_TOPIC;

const long interval = 1000;
unsigned long previousMillis = 0;

int count = 0;

void setup() {
  //配置led灯模式为输出
  pinMode(LED_BUILTIN, OUTPUT);

  //初始化串口，并等待串口打开
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  matrix.loadSequence(animation);
  matrix.begin();
  // turn on autoscroll to avoid calling next() to show the next frame; the paramenter is in milliseconds
  // matrix.autoscroll(300);
  matrix.play(true);

  // 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.print("Attempting to connect to the MQTT broker: ");
  Serial.println(broker);
  delay(3000);
  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();

  Serial.print("Subscribing to topic: ");
  Serial.println(sub_topic);
  Serial.println();

  // subscribe to a topic
  mqttClient.subscribe(sub_topic);

  // topics can be unsubscribed using:
  // mqttClient.unsubscribe(topic);
  pinMode(LED_BUILTIN, OUTPUT);

  Serial.print("Waiting for messages on topic: ");
  Serial.println(sub_topic);
  Serial.println();
  //初始化成功提示
  Serial.print("INIT success!");
}

void loop() {
  int lightsensor = analogRead(0);
  int messageSize = mqttClient.parseMessage();
  if (messageSize) {
    // use the Stream interface to print the contents
    while (mqttClient.available()) {
      char msg = (char)mqttClient.read();
      // Serial.print(msg);
      // Serial.println();
      led_switch(&msg);
    }
  //串口输出
  }
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval) {

    previousMillis = currentMillis;
    update_sensor(lightsensor);
    Serial.println("updated");
    count++;
  }

}

void servo(int msg) {
    mqttClient.beginMessage("None/f/servo");
    mqttClient.print(msg);
    mqttClient.print("\0");
    mqttClient.endMessage();
}

void update_sensor(int value){
  StaticJsonDocument<200> doc;
  int a = value*100/1024;
  open_window(a);
  doc["light"] = a;
  String payload;
  serializeJson(doc, payload);
  mqttClient.beginMessage("homeassistant/sensor/light");
  mqttClient.print(payload.c_str());
  mqttClient.print("\0");
  mqttClient.endMessage();
}

void open_window(int value){
  if (value<25){
    servo(1);
  }
  else if (value<50 && value>=25){
    servo(2);
  }
  else if (value<75 && value>=50){
    servo(3);
  }
  else if (value<101 && value>=75){
    servo(4);
  };
}