Honey Supply Detector

const int buttonPin = 7;     // the number of the pushbutton pin
const int ledPin =  LED_BUILTIN ;      // the number of the LED pin

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status
int inByte = 0;

void setup() {
  Serial.begin(9600);
  // initialize the LED pin as an output:
  pinMode(ledPin, OUTPUT);
  // initialize the pushbutton pin as an input:
  pinMode(buttonPin, INPUT);
}
void myResponse(int myValue)
{
    if (Serial.available() > 0) {
    // read the input
    inByte = Serial.read();
    delay(500); // small delay before responding

    // respond only if correct command is received
    if ((char)inByte == 'r') {
      // respond with analog measurement
      Serial.println(myValue);
    }
    }
}
void loop() {
  // read the state of the pushbutton value:
  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed.
  // if it is, the buttonState is HIGH:
  if (buttonState == HIGH) {
    // turn LED on:
    digitalWrite(ledPin, HIGH);
    myResponse(123);
    
  } else {
    // turn LED off:
    digitalWrite(ledPin, LOW);
    myResponse(345);
  }
    
}