//Connection RM18 to RM8

#include <SoftwareSerial.h>

constexpr int8_t ledPin = 13;
constexpr int8_t RX = 11;
constexpr int8_t TX = 10;

SoftwareSerial bleSerial(RX, TX);

//Use the '' to store them with their ascii value
enum states : int8_t {
  OFF = '0',
  ON = '1', 
  IDLE = '2'
};
states status = OFF;

void setup() {
  bleSerial.begin(9600);
  pinMode(ledPin, OUTPUT);

  bleSerial.println("\nPress S to start\nX to STOP\nand R to reset");
}

void loop() {
  if(bleSerial.available() > 0) {
    status = (states)bleSerial.read();
  }

  switch(status) {
    case ON:
      digitalWrite(ledPin, HIGH);
      bleSerial.println("ON");
      status = IDLE;
    break;

    case OFF:
      digitalWrite(ledPin, LOW);
      bleSerial.println("OFF");
      status = IDLE;
    break;

    case IDLE:
      //Do nothing here
    break;

    default:
      bleSerial.println("Invalid input, please enter 0 or 1");
  }
}