#include <SoftwareSerial.h>

SoftwareSerial ble(2, 3);
int value = 0;                //Integer to control motor speed
const int CW_pin = 4; 
String command = "";        //String to hold commands from Android App
long display_updated_time;  //timestamp of last screen update

void setup() {
  Serial.begin(9600);
ble.begin(9600);
pinMode(CW_pin, OUTPUT);
}

void loop() {

  command = "";
  if (Serial.available() > 0) {               //check for string commands from AppInventor
    command = Serial.readString();            //store command as a string
  }

  
  
  if (command.charAt(0) == 'C') {             //If command starts with the letter "c"
    command.remove(0,1);                      //remove the first letter "c" from the string "c125" becomes "125"
    value = command.toInt();                    //convert the rest of string into an integer 
  }
  
  value=map(value,0,100,0,255);
  analogWrite(CW_pin,value);
    }
  
}