alex9ufo 聰明人求知心切: 實驗2-1 Node-RED , MQTT , ESP32 LED , SQLite , Line Notify (利用ESP32 multitasking)

實驗2-1 Node-RED , MQTT , ESP32 LED , SQLite , Line Notify (利用ESP32 multitasking)
//wifi &  MQTT
#include <WiFi.h>
#include <PubSubClient.h>

//RC522 SPI Mode 
#include <SPI.h>
#include <MFRC522.h>

//GPIO 2 D1 Build in LED
#define LED 2


// WiFi
const char *ssid = "alex9ufo"; // Enter your Wi-Fi name
const char *password = "alex9981";  // Enter Wi-Fi password

// MQTT Broker
const char *mqtt_broker = "broker.mqtt-dashboard.com";
const char *topic1 = "alex9ufo/esp32/led";
const char *topic2 = "alex9ufo/esp32/RFID";   //in this program not uesd
const char *topic = "alex9ufo/esp32/Starting";
const char *topic3 = "alex9ufo/esp32/led_status";  

const char *mqtt_username = "alex9ufo";
const char *mqtt_password = "public";
const int mqtt_port = 1883;

bool ledState = false;
bool atwork = false;


WiFiClient espClient;
PubSubClient client(espClient);


String json = "";
bool Flash = false;  //true
bool Timer = false;  //true
bool Send = false;  //true
int Count= 0;

char jsonChar1[50];  //client.publish("alex9ufo/Esp32/RFID"
//宣告任務Task1
TaskHandle_t Task1;

// Wifi reconnect
unsigned long previousMillis = 0;
unsigned long interval = 30000;
//===========================================================
//任務1副程式Task1_senddata
void Task1_senddata(void * pvParameters ) {
  //無窮迴圈
  for (;;) {
   
    if (client.connected()) {        
        if (Send) {
          // Convert JSON string to character array
          json.toCharArray(jsonChar1, json.length()+1);
          Serial.print("Publish message: ");
          Serial.println(json);
          // Publish JSON character array to MQTT topic
          client.publish(topic3,jsonChar1); //"alex9ufo/esp32/led_status";
        } 
        Send = false;    
    } 
    else 
    {
      if (WiFi.status() != WL_CONNECTED)  {
        Serial.println("Reconnecting to WiFi...");
        WiFi.disconnect();
        WiFi.reconnect();
      }
    }

   
  //Task1休息，delay(X)不可省略
  delay(1000);
  }
}
//===========================================================

void setup_wifi() {
  delay(10);
  // We start by connecting to a WiFi network
  Serial.println();
  Serial.print("Connecting to ");
  Serial.println(ssid);

  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("");
  Serial.println("WiFi connected");
  Serial.println("IP address: ");
  Serial.println(WiFi.localIP());
}    

//===========================================================
void callback(char *topic, byte *payload, unsigned int length) {
    Serial.print("Message arrived in topic: ");
    Serial.println(topic);
    Serial.print("Message: ");
    String message;
    for (int i = 0; i < length; i++) {
        message += (char) payload[i];  // Convert *byte to string
    }
    Serial.print(message);
    if (message == "on" && !ledState) {
        digitalWrite(LED, HIGH);  // Turn on the LED
        ledState = true;  //ledState = ture HIGH
        Flash = false;
        Timer = false;
        json ="ON";
        Send = true ;
    }
    if (message == "off" && ledState) {
        digitalWrite(LED, LOW); // Turn off the LED
        ledState = false; //ledState = false LOW
        Flash = false;
        Timer = false;
        json ="OFF";
        Send = true ;

    }
    if (message == "flash" ) {
        digitalWrite(LED, LOW); // Turn off the LED
        Flash = true;
        Timer = false;
        json ="FLASH";
        Send = true ;        

    }
    if (message == "timer" ) {
        digitalWrite(LED, LOW); // Turn off the LED
        Flash = false;
        Timer = true;
        json ="TIMER";
        Send = true ;
        Count= 11;
    }

    if (message == "toggle" ) {
        digitalWrite(LED, !digitalRead(LED));   // Turn the LED toggle 
        if (digitalRead(LED)) 
            ledState = true;
        else
            ledState = false; 
        
        Flash = false;
        Timer = false;
        json ="TOGGLE";
        Send = true ;        
    }

    Serial.println();
    Serial.println("-----------------------");
}
//===========================================================
void reconnect() {
  // Loop until we're reconnected
  while (!client.connected()) {
    Serial.print("Attempting MQTT connection...");
    // Attempt to connect

    if (client.connect("esp32-client-")) {
      Serial.println("connected");
      // Subscribe
      client.subscribe("alex9ufo/esp32/led");
      client.subscribe("alex9ufo/esp32/RFID");      
    } else {
      Serial.print("failed, rc=");
      Serial.print(client.state());
      Serial.println(" try again in 5 seconds");
      // Wait 5 seconds before retrying
      delay(5000);
      if (WiFi.status() != WL_CONNECTED)  {
        Serial.println("Reconnecting to WiFi...");
        WiFi.disconnect();
        WiFi.reconnect();
      }
    }
  }
}
//===========================================================
void LED_flash_timer() {
  if (Flash){
    digitalWrite(LED, !digitalRead(LED));
    delay(500);
    if (digitalRead(LED)) 
      ledState = true;
    else
      ledState = false; 
  } //(Flash)
        
  if (Timer) {
    digitalWrite(LED, HIGH);
    delay(500);
    if (digitalRead(LED)) 
        ledState = true;
    else
        ledState = false; 

    Count=Count-1;
    if (Count == 0 ){
        Timer=false;
        digitalWrite(LED, LOW);
        ledState = false;
    }
  } //(Timer)

}
 //===========================================================   
void setup() {
    // Set software serial baud to 115200;
    Serial.begin(115200);
    delay(1000); // Delay for stability
    //======================================================
    // Connecting to a WiFi network
    setup_wifi();
    // Setting LED pin as output
    pinMode(LED, OUTPUT);
    digitalWrite(LED, LOW);  // Turn off the LED initially
    //======================================================

    Serial.println(F("=========Ready!==========="));
    Serial.println(F("==========================")); 
    // Connecting to an MQTT broker
    client.setServer(mqtt_broker, mqtt_port);
    client.setCallback(callback);
    while (!client.connected()) {
        String client_id = "esp32-client-";
        client_id += String(WiFi.macAddress());
        Serial.printf("The client %s connects to the public MQTT broker\n", client_id.c_str());
        if (client.connect(client_id.c_str(), mqtt_username, mqtt_password)) {
            Serial.println("Public HiveMQ MQTT broker (broker.mqtt-dashboard.com) connected");
        } else {
            Serial.print("Failed with state ");
            Serial.print(client.state());
            delay(2000);
        }
    }

    // Publish and subscribe
    client.subscribe(topic1);

    //在核心0啟動任務1
    xTaskCreatePinnedToCore(
    Task1_senddata, /*任務實際對應的Function*/
      "Task1",        /*任務名稱*/
      10000,          /*堆疊空間*/
      NULL,           /*無輸入值*/
      0,              /*優先序0*/
      &Task1,         /*對應的任務變數位址*/
      0);             /*指定在核心0執行 */
}
//===========================================================
void loop() 
{
 if (!client.connected()) {
      reconnect();
      Serial.print(" client not connected  reconnect ");
      delay(200);
    }
  client.loop();

  //process Timer & Flash
  LED_flash_timer();

  unsigned long currentMillis = millis();
  // if WiFi is down, try reconnecting
  if ((WiFi.status() != WL_CONNECTED) && (currentMillis - previousMillis >=interval)) {
    Serial.print(millis());
    Serial.println("Reconnecting to WiFi...");
    WiFi.disconnect();
    WiFi.reconnect();
    previousMillis = currentMillis;

    client.setCallback(callback);
  }

}
//===========================================================
alex9ufo 聰明人求知心切

2023年8月27日星期日

實驗2-1 Node-RED , MQTT , ESP32 LED , SQLite , Line Notify (利用ESP32 multitasking)

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113 學年度第 1 學期 RFID應用課程 Arduino程式

2023年8月27日 星期日

實驗2-1 Node-RED , MQTT , ESP32 LED , SQLite , Line Notify (利用ESP32 multitasking)

沒有留言:

張貼留言

113 學年度第 1 學期 RFID應用課程 Arduino程式

2023年8月27日星期日
