doButton.py

#!/usr/bin/env python

import sys
import evdev
import time
import subprocess

# gatttool -i hci0 -b E0:E5:CF:AD:71:A0 --char-write-req -a 0x0043 -n cc2333 #on
# gatttool -i hci0 -b E0:E5:CF:AD:71:A0 --char-write-req -a 0x0043 -n cc2433 #on

def lamp(light):
    if light:
        cmd = "/usr/bin/gatttool -i hci0 -b E0:E5:CF:AD:71:A0 --char-write-req -a 0x0043 -n cc2333"
    else:
        cmd = "/usr/bin/gatttool -i hci0 -b E0:E5:CF:AD:71:A0 --char-write-req -a 0x0043 -n cc2433"
    p = subprocess.Popen(cmd, shell=True, stderr=subprocess.PIPE)

while True:
    try:
        devices = [evdev.InputDevice(fn) for fn in evdev.list_devices()]
        toggle = True
        for device in devices:
            if device.name == 'AB Shutter 3':
                for event in device.read_loop():
                    if event.type == evdev.ecodes.EV_KEY:
                        print (evdev.categorize(event).keystate)
                        if evdev.categorize(event).keystate == 0:
                            if evdev.categorize(event).keycode == "KEY_VOLUMEUP":
                                if toggle:
                                    print ("On, now off")
                                else:
                                    print ("Off, no on")
                                lamp(toggle)
                                toggle = not toggle
                                print "UP"
    except:
        # Bluetooth has goen to sleep ?
        pass
    time.sleep(1)


#                    pass
#                if event.type == evdev.ecodes.EV_KEY && event.