NodeMCU ESP8266 / ESP8285 Arduino #38 ESP8266 NudeMCU Relay สั่งงานเปิดปิดไฟผ่าน Relay แบบออนไลน์

1. ต่อวงจรตามนี้
2. เขียนโคดตามนี้

   #include 
   #include 
   
   const char* ssid = "Tenda_3EF910";
   const char* password = "gift4321";
   
   const int led = D2;
   int state = 0;
   String status_led = "OFF";
   
   ESP8266WebServer server(80);
   void handle_led() {
   state = server.arg("led").toInt();
   Serial.println(server.arg("led"));
   Serial.println(server.arg("test"));
   status_led = "ON";
   if (state == 1) {
   digitalWrite(led, 1);
   status_led = "ON";
   } else {
   digitalWrite(led, 0);
   status_led = "OFF";
   }
   server.send(200, "text/html", "LED is " + status_led + "
    ON  OFF ");
   }
   void setup(void) {
   Serial.begin(115200);
   Serial.println("");
   pinMode(led, OUTPUT);
   
   WiFi.begin(ssid, password);
   while (WiFi.status() != WL_CONNECTED) {
   delay(500);
   Serial.print(".");
   }
   Serial.println("");
   Serial.print("Connected to ");
   Serial.println(ssid);
   Serial.print("IP address: ");
   Serial.println(WiFi.localIP());
   
   server.on("/", handle_led);
   server.begin();
   Serial.println("HTTP server started");
   }
   
   void loop(void) {
   server.handleClient();
   }
   
   

    

คลิปวีดีโอสอน Arduino ESP8266 NudeMCU Relay สั่งงานเปิดปิดไฟผ่าน Relay แบบออนไลน์