led_alc.c

#include <CurieBLE.h>

const int ledPin = 13; // set ledPin to use on-board LED
BLEPeripheral blePeripheral; // create peripheral instance

BLEService alcoholService("29B10000-E8F2-537E-4F6C-D104768A1214"); // create service
BLEShortCharacteristic alcoholChar("29B10001-E8F2-537E-4F6C-D104768A1214", BLERead | BLEWrite | BLENotify);

const int termLedPin = 13;
const int alcoholSensorPin = 0;

void setup() {
  Serial.begin(9600);

  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }
  
  Serial.println("start setup");
    
  pinMode(ledPin, OUTPUT); // use the LED on pin 13 as an output
  
  // set the local name peripheral advertises
  blePeripheral.setLocalName("LED_ALC");
  
  blePeripheral.setAdvertisedServiceUuid(alcoholService.uuid());
  blePeripheral.addAttribute(alcoholService);
  blePeripheral.addAttribute(alcoholChar);
  

  // assign event handlers for connected, disconnected to peripheral
  blePeripheral.setEventHandler(BLEConnected, blePeripheralConnectHandler);
  blePeripheral.setEventHandler(BLEDisconnected, blePeripheralDisconnectHandler);

  alcoholChar.setEventHandler(BLEWritten, alcoholCharacteristicWritten);
  
  alcoholChar.setValue(0);


  // advertise the service
  blePeripheral.begin();
  Serial.println(("Bluetooth device active, waiting for connections..."));
}

void loop() {
  // poll peripheral
  blePeripheral.poll();
}

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

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

void alcoholCharacteristicWritten(BLECentral& central, BLECharacteristic& characteristic) {
  digitalWrite(termLedPin, HIGH);

  int sumValue = 0;
  for(int i = 0; i < 150000; i++) {
    sumValue = sumValue + analogRead(alcoholSensorPin);
  }
  
  digitalWrite(termLedPin, LOW);
  int avgValue = 1024 - (sumValue / 150000);

  alcoholChar.setValue(avgValue);  
  Serial.println(avgValue);
}