from pybleno import *
import sys
import signal
import array
import struct
import traceback
from builtins import str
import RPi.GPIO as GPIO
import time

GPIO.setmode(GPIO.BCM)

GPIO.setup(4, GPIO.OUT) #GPIO4

print('bleno - echo');

bleno = Bleno()

class EchoCharacteristic(Characteristic):
    
    def __init__(self, uuid):
        Characteristic.__init__(self, {
            'uuid': uuid,
            'properties': ['read', 'write', 'notify'],
            'value': None
          })
          
        self._value = array.array('B', [0] * 0)
        self._updateValueCallback = None
          
    def onReadRequest(self, offset, callback):
        print('EchoCharacteristic - %s - onReadRequest: value = %s' % (self['uuid'], [hex(c) for c in self._value]))
        callback(Characteristic.RESULT_SUCCESS, self._value)

    def onWriteRequest(self, data, offset, withoutResponse, callback):
        self._value = data

        print('EchoCharacteristic - %s - onWriteRequest: value = %s' % (self['uuid'], [hex(c) for c in self._value]))

        if (self._value == b'\x01'):
            GPIO.output(4, True)　# 0x01が入力されたらLEDを点灯
            print('True')
        else:
            GPIO.output(4, False)　# 0x01以外ならLEDを消灯
            print('False')

        if self._updateValueCallback:
            print('EchoCharacteristic - onWriteRequest: notifying');
            
            self._updateValueCallback(self._value)
        
        callback(Characteristic.RESULT_SUCCESS)
        
    def onSubscribe(self, maxValueSize, updateValueCallback):
        print('EchoCharacteristic - onSubscribe')
        
        self._updateValueCallback = updateValueCallback

    def onUnsubscribe(self):
        print('EchoCharacteristic - onUnsubscribe');
        
        self._updateValueCallback = None

def onStateChange(state):
   print('on -> stateChange: ' + state);

   if (state == 'poweredOn'):
     bleno.startAdvertising('echo', ['ff00'])
   else:
     bleno.stopAdvertising();
bleno.on('stateChange', onStateChange)
    
def onAdvertisingStart(error):
    print('on -> advertisingStart: ' + ('error ' + error if error else 'success'));

    if not error:
        bleno.setServices([
            BlenoPrimaryService({
                'uuid': 'fff0',
                'characteristics': [ 
                    EchoCharacteristic('3012')
                    ]
            })
        ])
bleno.on('advertisingStart', onAdvertisingStart)

GPIO.output(4, False)

print ('Hit  to disconnect')

if (sys.version_info > (3, 0)):
    input()
else:
    raw_input()

bleno.stopAdvertising()
bleno.disconnect()

GPIO.cleanup()

print ('terminated.')
sys.exit(1)