[Arduino demo source code for KC868-A4]-08 control relay by BlueTooth

[KinCony Support]

Code 7: //The demo code is Bluetooth    You can copy the code to your Arduino IDE.

Code:

#include "BluetoothSerial.h"

// init Class:
BluetoothSerial ESP_BT;

// init PINs: assign any pin on ESP32
int Relay1 = 2;
int Relay2 = 15;
int Relay3 = 5;
int Relay4 = 4;

// Parameters for Bluetooth interface
int incoming;

void setup() {
  ESP_BT.begin("KC868-A4-BlueTooth"); //Name of your Bluetooth interface -> will show up on your phone

  pinMode (Relay1, OUTPUT);
  pinMode (Relay2, OUTPUT);
  pinMode (Relay3, OUTPUT);
  pinMode (Relay4, OUTPUT);
}


void loop() {
 
  // -------------------- Receive Bluetooth signal ----------------------
  if (ESP_BT.available())
  {
    incoming = ESP_BT.read(); //Read what we receive

    // separate button ID from button value -> button ID is 10, 20, 30,40 etc, value is 1 or 0
    //Relay1 ON:11  OFF:10
    //Relay2 ON:21  OFF:20
    //Relay3 ON:31  OFF:30
    //Relay4 ON:41  OFF:40    
    int button = floor(incoming / 10);
    int value = incoming % 10;
   
    switch (button) {
      case 1: 
        digitalWrite(Relay1, value);
        break;
      case 2: 
        digitalWrite(Relay2, value);
        break;
      case 3: 
        digitalWrite(Relay3, value);
        break;
      case 4: 
        digitalWrite(Relay4, value);
        break;      
    }
  }
}