#include <RFduinoBLE.h>

const int led = 2;   //red led on RGB shield
const int accel = 1; //Accelerometer sensor pin

//power pin for accelerometer
const int accelONOFF = 0; 
int accelV = 0;  //accelerometer Value
int previous_accelV = 0;
int previous_accelV_high = 0;
int previous_accelV_low = 0;



void setup() 
{

  pinMode(led, OUTPUT);
  pinMode(accelONOFF, OUTPUT); //Accelerometer
  pinMode(accel, INPUT);  //Accelerometer

  RFduinoBLE.deviceName = "RFdu";
  RFduinoBLE.txPowerLevel = -20; //lowest BLE power
  // this is the data we want to 
  //appear in the advertisement
  // (the deviceName length plus the 
  //advertisement length must be <= 18 bytes
  RFduinoBLE.advertisementData = "motion";
  
  // start the BLE stack
  RFduinoBLE.begin();
}


void loop() 
{
  
  digitalWrite(accelONOFF, HIGH); //turn accelerometer on
  delay(10); 
  previous_accelV = analogRead(accel); //read sensor
  digitalWrite(accelONOFF, LOW);  //turn accelerometer off   
  RFduino_ULPDelay(1000);  //let the RFduino 
  //sleep for 1000ms
  delay(5);
  digitalWrite(accelONOFF, HIGH); //turn accelerometer on
  delay(10);
  accelV = analogRead(accel); //read sensor
  digitalWrite(accelONOFF, LOW);  //turn accelerometer off
  //leave some play for inaccuracy
  previous_accelV_low = previous_accelV - 8;  
  previous_accelV_high = previous_accelV + 8;

  //compare the previous value to the current
  if (accelV < previous_accelV_low || accelV > previous_accelV_high)
  {
  while(1)
    {
    digitalWrite(led, HIGH);
    RFduinoBLE.send(1);  
    delay(50);
    digitalWrite(led, LOW); 
    RFduinoBLE.send(0);  
    delay(50);
    }
  }
}

void RFduinoBLE_onDisconnect()
{
  // don't leave the led on if they disconnect
  digitalWrite(led, LOW);
}