alex9ufo 聰明人求知心切: 11月 2024

2024年11月28日星期四

2024_09 作業3 以Node-Red 為主

2024_09 作業3 (以Node-Red 為主 Arduino 可能需要配合修改 )

Arduino 可能需要修改的部分

1)mqtt broker

2) 主題Topic (發行接收)

3) WIFI ssid , password

const char broker[] = "test.mosquitto.org";
//const char broker[] = "broker.mqtt-dashboard.com";
int        port     = 1883;
const char *SubTopic1 = "alex9ufo/esp32/led";
const char *PubTopic2 = "alex9ufo/esp32/led_status";
const char *PubTopic3 = "alex9ufo/esp32/RFID";
const char willTopic[] = "alex9ufo/esp32/Starting";





=============================================

Node-Red LED 控制及資料庫1

資料庫位置 C:\Users\User\.node-red\EX2_3_LED.db

//CREATE TABLE LEDSTATUS (

//id INTEGER,

//STATUS TEXT,

//Date DATE,

//Time TIME,

//PRIMARY KEY (id)

//);

//CREATE TABLE LEDSTATUS (id INTEGER,STATUS TEXT,Date DATE,Time TIME,PRIMARY KEY (id));

msg.topic = "CREATE TABLE LEDSTATUS (id INTEGER,STATUS TEXT,Date DATE,Time TIME,PRIMARY KEY (id))";

return msg;

=============================================

MQTT Out節點發行到 Broker

Broker test.mosquitto.org :1883

Topic主題 : alex9ufo/esp32/led

=============================================

Insert funtion 新增

var Today = new Date();

var yyyy = Today.getFullYear(); //年

var MM = Today.getMonth()+1; //月

var dd = Today.getDate(); //日

var h = Today.getHours(); //時

var m = Today.getMinutes(); //分

var s = Today.getSeconds(); //秒

if(MM<10)

{

MM = '0'+MM;

}

if(dd<10)

{

dd = '0'+dd;

}

if(h<10)

{

h = '0'+h;

}

if(m<10)

{

m = '0' + m;

}

if(s<10)

{

s = '0' + s;

}

var var_date = yyyy+'/'+MM+'/'+dd;

var var_time = h+':'+m+':'+s;

var myLED = msg.payload;

msg.topic = "INSERT INTO LEDSTATUS ( STATUS , Date , Time ) VALUES ($myLED, $var_date , $var_time ) " ;

msg.payload = [myLED, var_date , var_time ]

return msg;

//INSERT INTO LEDSTATUS (

//id INTEGER,

//STATUS TEXT,

//Date DATE,

//Time TIME,

//PRIMARY KEY (id)

//);

=============================================

檢視資料 (最新50筆資料)

msg.topic = "SELECT * FROM LEDSTATUS ORDER BY id DESC LIMIT 50";

return msg;

=============================================

確認或取消

var topic=msg.payload;

if (topic==""){

return [msg,null];

}

if (topic=="Cancel"){

return [null,msg];

}

return msg;

=============================================

(L)刪除所有資料

msg.topic = "DELETE from LEDSTATUS";

return msg;

=============================================

刪除資料庫

msg.topic = "DROP TABLE LEDSTATUS";

return msg;

=============================================

查詢一筆資料SELECT * FROM WHERE id LIKE

var id = msg.payload.id;

var s=global.get("SEL1")

msg.topic="";

var temp="";

if (s==1)

{

temp ="SELECT * FROM LEDSTATUS";

temp=temp+" WHERE id LIKE '"+ id +"'";

}

msg.topic=temp;

global.set("SEL1",0);

return msg;

=============================================

刪除一筆資料DELETE FROM WHERE id LIKE

var id = msg.payload.id;

var s=global.get("SEL2")

msg.topic="";

var temp="";

if (s==2)

{

temp ="DELETE FROM LEDSTATUS";

temp=temp+" WHERE id LIKE '"+ id +"'";

}

msg.topic=temp;

global.set("SEL2",0)

return msg;

=============================================

更正一筆資料 update LEDSTATUS set

var id = global.get("ID");

var status = msg.payload.Status;

var date = msg.payload.date;

var time = msg.payload.time;

var s=global.get("SEL3")

msg.topic="";

var temp="";

if (s==3)

{

temp ="update LEDSTATUS set ";

temp=temp+" STATUS= '" + status +"'";

temp=temp+" , Date= '" + date +"'";

temp=temp+" , Time= '" + time +"'";

temp=temp+" WHERE id=" + id;

//msg.topic = "update LEDSTATUS set ( id , STATUS , Date , Time ) VALUES ($id, $status , $date , $time ) " ;

//msg.payload = [id,status,date,time]

}

msg.topic=temp;

return msg;

=============================================

MQTT In節點發行到 Broker

Broker test.mosquitto.org :1883

Topic主題 : alex9ufo/esp32/led_status

=============================================

Set Line API Function

msg.headers = {'content-type':'application/x-www-form-urlencoded','Authorization':'Bearer A4wwPNh2WqB7dlfeQyyIAwtggn1k1fZSI5LkkCdia1gB'};

msg.payload = {"message":msg.payload};

return msg;

發行權杖請參考發行權杖的取得

Bearer

與

A4wwPNh2WqB7dlfeQyyIAwtggn1kfZ1SI5LkkCdia1gB

中央有一空白: Bearer A4wwPNh

Node-Red RFID UID 資料庫2

=============================================

資料庫位置 C:\Users\User\.node-red\EX2_3RFID.db

//CREATE TABLE "RFIDtable" (

// "id" INT NOT NULL,

// "uidname" TEXT,

// "currentdate" DATE,

// "currenttime" TIME

// PRIMARY KEY("id")

//);

msg.topic = "CREATE TABLE RFIDtable(id INTEGER PRIMARY KEY AUTOINCREMENT, uidname TEXT, currentdate DATE, currenttime TIME)";

return msg;

=============================================

id SET function

var del_idtemp=1;

flow.set("idtemp", del_idtemp);

return msg;

=============================================

MQTT In節點發行到 Broker

Broker test.mosquitto.org :1883

Topic主題 : alex9ufo/esp32/RFID

==================================

Query or Insert Function

var query = flow.get("query_temp");

flow.set("uid_temp", msg.payload);

if (query==='NotQuery')

msg.payload='Create'

else

msg.payload='Query'

return msg;

==================================

Insert funtion 新增一筆資料

var Today = new Date();

var yyyy = Today.getFullYear(); //年

var MM = Today.getMonth()+1; //月

var dd = Today.getDate(); //日

var h = Today.getHours(); //時

var m = Today.getMinutes(); //分

var s = Today.getSeconds(); //秒

if(MM<10)

{

MM = '0'+MM;

}

if(dd<10)

{

dd = '0'+dd;

}

if(h<10)

{

h = '0'+h;

}

if(m<10)

{

m = '0' + m;

}

if(s<10)

{

s = '0' + s;

}

var var_date = yyyy+'/'+MM+'/'+dd;

var var_time = h+':'+m+':'+s;

var myRFID = flow.get('uid_temp');

msg.topic = "INSERT INTO RFIDtable ( uidname , currentdate, currenttime ) VALUES ($myRFID, $var_date , $var_time ) " ;

msg.payload = [myRFID, var_date , var_time ]

return msg;

//CREATE TABLE "RFIDtable" (

// "id" INT NOT NULL,

// "uidname" TEXT,

// "currentdate" DATE,

// "currenttime" TIME

// PRIMARY KEY("id")

//);

==================================

增加日期時間

var ms1=msg.payload[0];

var ms2=msg.payload[1];

var ms3=msg.payload[2];

msg.payload="新增一筆:"+ms1+", 日期: "+ms2+", 時間:"+ms3;

return msg;

==================================

Set Line API

msg.headers = {'content-type':'application/x-www-form-urlencoded','Authorization':'Bearer A4wwPNh2WqB7dlfeQyyIAwtggn1kfZSI5LkkCdia1gB'};

msg.payload = {"message":msg.payload};

return msg;

==================================

檢視資料

msg.topic = "SELECT * FROM RFIDtable ORDER BY id DESC LIMIT 50";

return msg;

==================================

確認刪除

var del_id = flow.get("idtemp");

msg.topic = "DELETE FROM RFIDtable WHERE id= ($del_id) " ;

msg.payload = [del_id]

return msg;

==================================

刪除所有資料

//DELETE from RFIDtable

msg.topic = "DELETE from RFIDtable";

return msg;

==================================

刪除資料庫

//DROP TABLE RFIDtable

msg.topic = "DROP TABLE RFIDtable";

return msg;

==================================

比對 function

var query_uid = flow.get("uidtemp");

msg.topic = "SELECT id,uidname , currentdate,currenttime FROM RFIDtable WHERE uidname LIKE ($query_uid) ";

msg.payload = [query_uid]

return msg;

==================================

Function

var tmp=msg.payload;

msg.topic = "select count( * ) as 總共有幾筆資料 from RFIDtable where uidname=($tmp)";

msg.payload=[tmp];

return msg;

==================================

Function

var query=msg.payload;

if (query== '1' )

msg.payload='Query';

else

msg.payload='NotQuery';

flow.set("query_temp", msg.payload);

return msg;

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Today = new Date();\nvar yyyy = Today.getFullYear(); //年\nvar MM = Today.getMonth()+1; //月\nvar dd = Today.getDate(); //日\nvar h = Today.getHours(); //時\nvar m = Today.getMinutes(); //分\nvar s = Today.getSeconds(); //秒\nif(MM<10)\n{\n MM = '0'+MM;\n}\n\nif(dd<10)\n{\n dd = '0'+dd;\n}\n\nif(h<10)\n{\n h = '0'+h;\n}\n\nif(m<10)\n{\n m = '0' + m;\n}\n\nif(s<10)\n{\n s = '0' + s;\n}\nvar var_date = yyyy+'/'+MM+'/'+dd;\nvar var_time = h+':'+m+':'+s;\n\nvar myLED = msg.payload;\n\n\nmsg.topic = \"INSERT INTO LEDSTATUS ( STATUS , Date , Time ) VALUES ($myLED, $var_date , $var_time ) \" ;\nmsg.payload = [myLED, var_date , var_time ]\nreturn msg;\n\n\n//INSERT INTO LEDSTATUS (\n//id INTEGER,\n//STATUS TEXT,\n//Date DATE,\n//Time TIME,\n//PRIMARY KEY (id)\n//);\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":280,"y":260,"wires":[["ba1700a943b1bd1b"]]},{"id":"0ff8eda4c787fbee","type":"ui_audio","z":"41b4f910767c89fe","name":"","group":"0487352be5053bfa","voice":"Microsoft 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msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":320,"y":420,"wires":[["b6e20dd58822d956"]]},{"id":"e8b2de47058199f6","type":"ui_table","z":"41b4f910767c89fe","group":"b0c194b692c58c9c","name":"LED 資料庫","order":1,"width":8,"height":14,"columns":[],"outputs":0,"cts":false,"x":790,"y":420,"wires":[]},{"id":"b6e20dd58822d956","type":"sqlite","z":"41b4f910767c89fe","mydb":"a4c15c0e38a27cca","sqlquery":"msg.topic","sql":"","name":"LED_STATUS","x":500,"y":420,"wires":[["e8b2de47058199f6"]]},{"id":"d192743b813cb3aa","type":"ui_button","z":"41b4f910767c89fe","name":"","group":"e7c2632dca7fe97d","order":5,"width":3,"height":1,"passthru":false,"label":"(L)刪除資料庫 ","tooltip":"","color":"","bgcolor":"green","className":"","icon":"","payload":"刪除資料庫 ","payloadType":"str","topic":"topic","topicType":"msg","x":100,"y":660,"wires":[["106fe02f4b567352","0232d1d03f74ba0f"]]},{"id":"e3e691a9b6f1fce4","type":"function","z":"41b4f910767c89fe","name":"DROP　DATABASE","func":"//CREATE TABLE LEDSTATUS (\n//id INTEGER,\n//STATUS TEXT,\n//Date DATE,\n//Time TIME,\n//PRIMARY KEY (id)\n//);\n//CREATE TABLE LEDSTATUS (id INTEGER,STATUS TEXT,Date DATE,Time TIME,PRIMARY KEY (id));\nmsg.topic = \"DROP TABLE LEDSTATUS\";\nreturn msg;\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":500,"y":600,"wires":[["0ac15eb28214b6b7"]]},{"id":"0ac15eb28214b6b7","type":"sqlite","z":"41b4f910767c89fe","mydb":"a4c15c0e38a27cca","sqlquery":"msg.topic","sql":"","name":"LED_STATUS","x":720,"y":520,"wires":[["9e29d6efb208526e"]]},{"id":"eee0e0562add3a05","type":"ui_button","z":"41b4f910767c89fe","name":"","group":"e7c2632dca7fe97d","order":4,"width":3,"height":1,"passthru":false,"label":"(L)刪除所有資料 ","tooltip":"","color":"","bgcolor":"green","className":"","icon":"","payload":"刪除所有資料 ","payloadType":"str","topic":"topic","topicType":"msg","x":100,"y":560,"wires":[["0232d1d03f74ba0f","d22fecfb8e37f6b0"]]},{"id":"8c4a79912036e006","type":"function","z":"41b4f910767c89fe","name":"DELETE ALL DATA","func":"//CREATE TABLE LEDSTATUS (\n//id INTEGER,\n//STATUS TEXT,\n//Date DATE,\n//Time TIME,\n//PRIMARY KEY (id)\n//);\n//CREATE TABLE LEDSTATUS (id INTEGER,STATUS TEXT,Date DATE,Time TIME,PRIMARY KEY (id));\nmsg.topic = \"DELETE from LEDSTATUS\";\nreturn msg;\n","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":370,"y":500,"wires":[["0ac15eb28214b6b7"]]},{"id":"106fe02f4b567352","type":"ui_toast","z":"41b4f910767c89fe","position":"prompt","displayTime":"3","highlight":"","sendall":true,"outputs":1,"ok":"OK","cancel":"Cancel","raw":true,"className":"","topic":"","name":"","x":290,"y":660,"wires":[["3f8e6d780163b2d8"]]},{"id":"3f8e6d780163b2d8","type":"function","z":"41b4f910767c89fe","name":"function 86","func":"var topic=msg.payload;\nif (topic==\"\"){\n return [msg,null];\n \n}\nif (topic==\"Cancel\"){\n return [null,msg];\n \n}\nreturn msg;","outputs":2,"noerr":0,"initialize":"","finalize":"","libs":[],"x":470,"y":660,"wires":[["e3e691a9b6f1fce4"],[]]},{"id":"0232d1d03f74ba0f","type":"ui_audio","z":"41b4f910767c89fe","name":"","group":"b0c194b692c58c9c","voice":"Microsoft Hanhan - Chinese (Traditional, Taiwan)","always":true,"x":225,"y":600,"wires":[],"l":false},{"id":"d22fecfb8e37f6b0","type":"ui_toast","z":"41b4f910767c89fe","position":"prompt","displayTime":"3","highlight":"","sendall":true,"outputs":1,"ok":"OK","cancel":"Cancel","raw":true,"className":"","topic":"","name":"","x":310,"y":560,"wires":[["30d4f57b5808a46c"]]},{"id":"30d4f57b5808a46c","type":"function","z":"41b4f910767c89fe","name":"function 87","func":"var topic=msg.payload;\nif (topic==\"\"){\n return [msg,null];\n \n}\nif (topic==\"Cancel\"){\n return [null,msg];\n \n}\nreturn msg;","outputs":2,"noerr":0,"initialize":"","finalize":"","libs":[],"x":470,"y":560,"wires":[["8c4a79912036e006"],[]]},{"id":"6195eb71c46ac3fa","type":"ui_audio","z":"41b4f910767c89fe","name":"","group":"0487352be5053bfa","voice":"Microsoft Hanhan - Chinese (Traditional, Taiwan)","always":true,"x":175,"y":460,"wires":[],"l":false},{"id":"951f65c5730323f3","type":"ui_button","z":"41b4f910767c89fe","name":"","group":"e7c2632dca7fe97d","order":1,"width":3,"height":1,"passthru":false,"label":"(L)查詢一筆資料","tooltip":"","color":"","bgcolor":"green","className":"","icon":"","payload":"查詢一筆資料","payloadType":"str","topic":"topic","topicType":"msg","x":100,"y":720,"wires":[["0232d1d03f74ba0f","61b61726368812e2"]]},{"id":"6a752e8e7869da47","type":"function","z":"41b4f910767c89fe","name":"查詢一筆資料","func":"//\nvar id = msg.payload.id;\nvar s=global.get(\"SEL1\")\nmsg.topic=\"\";\nvar temp=\"\";\n\nif (s==1)\n{\n temp =\"SELECT * FROM LEDSTATUS\";\n temp=temp+\" WHERE id LIKE '\"+ id +\"'\";\n}\nmsg.topic=temp;\nglobal.set(\"SEL1\",0);\n\nreturn msg;\n\n//SELECT * FROM COMPANY WHERE AGE LIKE 'XXX%';\n//INSERT INTO LEDSTATUS (\n//id INTEGER,\n//STATUS TEXT,\n//Date DATE,\n//Time TIME,\n//PRIMARY KEY (id)\n//);\n\n//SELECT * FROM LEDSTATUS ORDER BY id DESC LIMIT 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2024年11月24日星期日

WOKWI LED + MQTT Node-Red SQLite

const char *mqtt_broker = "broker.mqtt-dashboard.com";

const char *topic1 = "alex9ufo/esp32/led";

const char *topic = "alex9ufo/esp32/Starting";

const char *topic3 = "alex9ufo/esp32/led_status";

//wifi &  MQTT
#include <WiFi.h>
#include <PubSubClient.h>

//GPIO 13 D1 Build in LED
#define LED 13


///////please enter your sensitive data in the Secret tab/arduino_secrets.h
const char *ssid =  "Wokwi-GUEST"; // your network SSID (name)
const char *password =  "" ;           // your network password (use for WPA, or use as key for WEP)
// 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 *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);


long lastMsg = 0;
long lastMsg1= 0;

char msg[50];
String json = "";
bool Flash = false;  //true
bool Timer = false;  //true
bool Send = false;  //true
int Count= 0;

char jsonChar1[50];
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 (;;) {
    //偵測上傳旗標是否為true
      // Process LED message
    LED_Message();   
    //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 (String(topic)=="alex9ufo/esp32/led") {

    if (message == "on" ) {
        digitalWrite(LED, LOW);  // Turn on the LED
        ledState = true;  //ledState = ture HIGH
        Flash = false;
        Timer = false;
        json ="ON";
        Send = true ;
    }
    if (message == "off") {
        digitalWrite(LED, HIGH); // 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");
      
    } 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_Message() {
    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)
    
    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);
        } 
        Send = false;    
    } 
    else 
    {
      if (WiFi.status() != WL_CONNECTED)  {
        Serial.println("Reconnecting to WiFi...");
        WiFi.disconnect();
        WiFi.reconnect();
      }
    }

}

//===========================================================
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
    //======================================================
    // 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);
    client.publish(topic,"ESP32 at work");

    //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();


  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);
  }

}
//===========================================================

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2024年11月28日 星期四

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2024年11月24日 星期日

WOKWI LED + MQTT Node-Red SQLite

2024_09 作業3 以Node-Red 為主

2024年11月28日星期四

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