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void loop() {
  byte currentValue = !digitalRead(BTN_PIN1);
  if (currentValue != lastValue) {  // if state changes
    lastValue = currentValue;      // save new state

    if (lastValue) {
      zunoSendToGroupSetValueCommand(CTRL_GROUP_1, ZUNO_SWITCHED_ON);   // if button pressed - send switch ON command
      digitalWrite(RelayPIN1,HIGH);    //  turn the Relay on
    } else {
      zunoSendToGroupSetValueCommand(CTRL_GROUP_1, ZUNO_SWITCHED_OFF);  // if button released - send switch OFF command
      [b]digitalWrite(RelayPIN1,LOW);     // turn the Relay off
    }
  }
}

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/* 
 * 
 * 4 Relays controlled thouth resistors 220Omh and optocouplers 817С 4 On/Off Switches
 * Off - HIGH
 * On - LOW
 */

// Pins definitions
#define RelayPin1 9
#define RelayPin2 10
#define RelayPin3 11
#define RelayPin4 12
#define BTN_PIN1 19       // switch pin19
#define BTN_PIN2 20       // switch pin20
#define BTN_PIN3 21       // switch pin21
#define BTN_PIN4 22       // switch pin22



byte lastValue;
byte buttonState; // Variables we use in this sketch




// Global variables to store data reported via getters
byte switchValue1 = 1;
byte switchValue2 = 1;
byte switchValue3 = 1;
byte switchValue4 = 1;

ZUNO_SETUP_SLEEPING_MODE(ZUNO_SLEEPING_MODE_ALWAYS_AWAKE);
ZUNO_SETUP_ASSOCIATIONS(ZUNO_ASSOCIATION_GROUP_SET_VALUE); // this macro defines association groups in Z-Uno


// Set up 10 channels
ZUNO_SETUP_CHANNELS(
  ZUNO_SWITCH_BINARY(getterSwitch1, setterSwitch1),
  ZUNO_SWITCH_BINARY(getterSwitch2, setterSwitch2),
  ZUNO_SWITCH_BINARY(getterSwitch3, setterSwitch3),
  ZUNO_SWITCH_BINARY(getterSwitch4, setterSwitch4)
);

void setup() {
  // set up I/O pins. Analog and PWM will be automatically set up on analogRead/analogWrite functions call
  pinMode(RelayPin1, OUTPUT);
  pinMode(RelayPin2, OUTPUT);
  pinMode(RelayPin3, OUTPUT);
  pinMode(RelayPin4, OUTPUT);
  pinMode(BTN_PIN1, INPUT_PULLUP); // setup pin as input with pullup
  pinMode(BTN_PIN2, INPUT_PULLUP); // setup pin as input with pullup
  pinMode(BTN_PIN3, INPUT_PULLUP); // setup pin as input with pullup
  pinMode(BTN_PIN4, INPUT_PULLUP); // setup pin as input with pullup
}

void loop() {
  byte currentValue = !digitalRead(BTN_PIN1);
  if (currentValue != lastValue) {  // if state changes
    lastValue = currentValue;      // save new state

    if (lastValue) {
      zunoSendToGroupSetValueCommand(CTRL_GROUP_1, ZUNO_SWITCHED_ON);   // if button pressed - send switch ON command
      digitalWrite(RelayPIN1,HIGH);    //  turn the Relay on
    } else {
      zunoSendToGroupSetValueCommand(CTRL_GROUP_1, ZUNO_SWITCHED_OFF);  // if button released - send switch OFF command
      digitalWrite(RelayPIN1,LOW);     // turn the Relay off
    }
  }
}

// Getters and setters

void setterSwitch1(byte value) {
  digitalWrite(RelayPin1, (value > 0) ? LOW : HIGH);
  switchValue1 = value;
}

byte getterSwitch1(){
  return switchValue1;
}

 void setterSwitch2(byte value) {
  digitalWrite(RelayPin2, (value > 0) ? LOW : HIGH);
  switchValue2 = value;
}

byte getterSwitch2(){
  return switchValue2;
}

void setterSwitch3(byte value) {
  digitalWrite(RelayPin3, (value > 0) ? LOW : HIGH);
  switchValue3 = value;
}

byte getterSwitch3(){
  return switchValue3;
}

void setterSwitch4(byte value) {
  digitalWrite(RelayPin4, (value > 0) ? LOW : HIGH);
  switchValue4 = value;
}

byte getterSwitch4(){
  return switchValue4;
}