gistfile1.txt

// Import libraries (BLEPeripheral depends on SPI)
#include <SPI.h>
#include <BLEPeripheral.h>
#include <TimerOne.h>
// define pins (varies per shield/board)
#define BLE_REQ   6
#define BLE_RDY   7
#define BLE_RST   4

BLEPeripheral blePeripheral = BLEPeripheral(BLE_REQ, BLE_RDY, BLE_RST);

BLEService potService = BLEService("fff0");
BLECharCharacteristic potCharacteristic = BLECharCharacteristic("fff1", BLERead | BLENotify);
BLEDescriptor potDescriptor = BLEDescriptor("2901", "pot");

BLEService buttonService = BLEService("fff3");
BLECharCharacteristic buttonCharacteristic = BLECharCharacteristic("fff4", BLEWrite );
BLEDescriptor buttonDescriptor = BLEDescriptor("2901", "btn");

volatile bool readFromSensor = false;
float lastReading;
const int buttonPin = 5;
int buttonState = 0;
void setup() {
  Serial.begin(115200);
#if defined (__AVR_ATmega32U4__)
  delay(5000);  //5 seconds delay for enabling to see the start up comments on the serial board
#endif

  blePeripheral.setLocalName("Dan's BLE"); // optional
  blePeripheral.setAdvertisedServiceUuid(potService.uuid()); // optional
  blePeripheral.addAttribute(potService);
  blePeripheral.addAttribute(potCharacteristic);
  blePeripheral.addAttribute(potDescriptor);
  
  blePeripheral.setAdvertisedServiceUuid(buttonService.uuid()); // optional
  blePeripheral.addAttribute(buttonService);
  blePeripheral.addAttribute(buttonCharacteristic);
  blePeripheral.addAttribute(buttonDescriptor);
  
  //eventHander for connect/disconnect events
  blePeripheral.setEventHandler(BLEConnected, blePeripheralConnectHandler); 
  blePeripheral.setEventHandler(BLEDisconnected, blePeripheralDisconnectHandler);


  buttonCharacteristic.setEventHandler(BLEWritten, buttonCharacteristicWritten);

  // begin initialization
  blePeripheral.begin();
  Timer1.initialize(2 * 10000); // in milliseconds
  Timer1.attachInterrupt(timerHandler);
  pinMode(buttonPin, INPUT);
  Serial.println(bleP
}

void loop() {
  buttonState = digitalRead(buttonPin);
    blePeripheral.poll();
    if (readFromSensor) {
      setPotCharacteristicValue();
      readFromSensor = false;
    }      
    //buttonCharacteristicValue(readFromSensor);
}

void timerHandler() {
  readFromSensor = true;
}

void setPotCharacteristicValue() {
  int reading = analogRead(A0);
  if (!isnan(reading) && significantChange(lastReading, reading, 50.0)) {
    potCharacteristic.setValue(reading/4);
    //Serial.println(potCharacteristic.value());
    Serial.print(F("Pot: ")); Serial.println(reading/4);
    lastReading = reading;
  }
}

boolean significantChange(float val1, float val2, float threshold) {
  return (abs(val1 - val2) >= threshold);
}

void blePeripheralConnectHandler(BLECentral& central) {
  Serial.print(F("Connected event, central: "));
  Serial.println(central.address());
}

void blePeripheralDisconnectHandler(BLECentral& central) {
  Serial.print(F("Disconnected event, central: "));
  Serial.println(central.address());
}

void buttonCharacteristicWritten(BLECentral& central, BLECharacteristic& characteristic) {
  // central wrote new value to characteristic, update LED
  //Serial.println( sizeof(setCharacteristic.value()));
  Serial.print(F("Characteristic event, writen: "));
  Serial.println( buttonCharacteristic.value(), DEC);
}