Master_Touch

// Master program set both Load LOW MED HIGH via Serial and also via touchPad

#include <Wire.h>
#define I2C_SLAVE_1  1
#define I2C_SLAVE_2  2

const byte interruptPin1 = 14;  // D5
const byte interruptPin2 = 12;  // D6
bool button1;
bool button2;

volatile int Load1state = LOW; // To make sure variables shared between an ISR
volatile int Load2state = LOW; // To make sure variables shared between an ISR

#define I2C_SDA 4 // D2                     // ESP8266
#define I2C_SCL 5 // D1

//#define I2C_SDA 21    // ESP32
//#define I2C_SCL 22


ICACHE_RAM_ATTR void handleInterruptOn1() {
  Load1state = !Load1state;
  if (Load1state) {
    Wire.beginTransmission(1);
    Wire.write('3');
    Wire.endTransmission();
    //      Serial.println("Device 1 HIGH Via Touch");
  }
  else if (!Load1state) {
    Wire.beginTransmission(1);
    Wire.write('0');
    Wire.endTransmission();
    //      Serial.println("Device 1 OFF Via Touch");
  }
}

ICACHE_RAM_ATTR void handleInterruptOn2() {
  Load2state = !Load2state;
  if (Load2state) {
    Wire.beginTransmission(2);
    Wire.write('3');
    Wire.endTransmission();
    //      Serial.println("Device 2 HIGH Via Touch");
  }
  else if (!Load2state) {
    Wire.beginTransmission(2);
    Wire.write('0');
    Wire.endTransmission();
    //      Serial.println("Device 2 OFF Via Touch");
  }
}


void setup() {
  Wire.begin(I2C_SDA, I2C_SCL);           // uncommnet for esp8266
  //  Wire.begin();                         // uncommnet for esp32
  Serial.begin(115200);
  attachInterrupt(digitalPinToInterrupt(interruptPin1), handleInterruptOn1, CHANGE);
  attachInterrupt(digitalPinToInterrupt(interruptPin2), handleInterruptOn2, CHANGE);


  Serial.print("Ready");
}


char x = 0;

void loop() {


  //    if (Load1state) {
  //      Wire.beginTransmission(1);
  //      Wire.write('3');
  //      Wire.endTransmission();
  ////      Serial.println("Device 1 HIGH Via Touch");
  //    }
  //    else if(!Load1state) {
  //      Wire.beginTransmission(1);
  //      Wire.write('0');
  //      Wire.endTransmission();
  ////      Serial.println("Device 1 OFF Via Touch");
  //    }
  //
  //
  //    if (Load2state) {
  //      Wire.beginTransmission(2);
  //      Wire.write('3');
  //      Wire.endTransmission();
  ////      Serial.println("Device 2 HIGH Via Touch");
  //    }
  //    else if(!Load2state) {
  //      Wire.beginTransmission(2);
  //      Wire.write('0');
  //      Wire.endTransmission();
  ////      Serial.println("Device 2 OFF Via Touch");
  //    }


  //-------------------------------------//
  if (Serial.available() > 0) {

    x = Serial.read();

    if (x == '0') {
      Wire.beginTransmission(1);
      Wire.write('0');
      Wire.endTransmission();
      Serial.println("Device 1 OFF");
    }
    if (x == '1') {
      Wire.beginTransmission(1);
      Wire.write('1');
      Wire.endTransmission();
      Serial.println("Device 1 LOW");
    }
    if (x == '2') {
      Wire.beginTransmission(1);
      Wire.write('2');
      Wire.endTransmission();
      Serial.println("Device 1 MED");
    }
    if (x == '3') {
      Wire.beginTransmission(1);
      Wire.write('3');
      Wire.endTransmission();
      Serial.println("Device 1 HIGH");
    }

    if (x == '7') {
      Wire.beginTransmission(2);
      Wire.write('0');
      Wire.endTransmission();
      Serial.println("Device 2 OFF");
    }
    if (x == '4') {
      Wire.beginTransmission(2);
      Wire.write('1');
      Wire.endTransmission();
      Serial.println("Device 2 LOW");
    }
    if (x == '5') {
      Wire.beginTransmission(2);
      Wire.write('2');
      Wire.endTransmission();
      Serial.println("Device 2 MED");
    }
    if (x == '6') {
      Wire.beginTransmission(2);
      Wire.write('3');
      Wire.endTransmission();
      Serial.println("Device 2 HIGH");
    }
  }
}