#include <SoftwareSerial.h>

#define RX    2   // MOSI 0
#define TX    1   // SCK 2
SoftwareSerial Serial(RX, TX);

const int analogPin = 3;    // pin that the sensor is attached to
const int laser = 4;       // pin that the LED is attached to



void setup() {
pinMode(analogPin, INPUT);
pinMode(laser, OUTPUT);
Serial.begin(9600);
Serial.println("HELLO");

}

void loop() {
   if (Serial.available()) {
     int analogValue = analogRead(analogPin);
     char MasterCommand = Serial.read();
     //char message = "O";
     // Serial.println("a");
     if(MasterCommand == 'O') {
      digitalWrite(laser, HIGH);
      Serial.print("on");
      Serial.println(analogValue);
      
     }
     //else{
      //Serial.print(MasterCommand);
     //}
  }



}