hue-dash.py

import socket
import struct
import binascii
from time import sleep
from phue import Bridge

b = Bridge('192.168.1.247') # Enter bridge IP here.
turnOn =  {'transitiontime' : 1, 'hue' : 34112, 'sat' :254, 'on' : True, 'bri' : 254}
turnOff =  {'on' : False}

number = 0

def start():
    global number
    number += 1

def toggleAll():
    if (number % 2) == 0:
        print "turn off all lights"
        for _ in range(3):
            b.set_group( [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16], turnOff)
            sleep(1)
    else:
        print "turn on all lights"
        for _ in range(3):
            b.set_group( [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16], turnOn)
            sleep(1)

rawSocket = socket.socket(socket.AF_PACKET, socket.SOCK_RAW,
                          socket.htons(0x0806))
MAC = '74c246214e50'

while True:
    packet = rawSocket.recvfrom(2048)

    ethernet_header = packet[0][0:14]
    ethernet_detailed = struct.unpack("!6s6s2s", ethernet_header)

    arp_header = packet[0][14:42]
    arp_detailed = struct.unpack("2s2s1s1s2s6s4s6s4s", arp_header)

    # skip non-ARP packets
    ethertype = ethernet_detailed[2]
    if ethertype != '\x08\x06':
        continue

    source_mac = binascii.hexlify(arp_detailed[5])
    dest_ip = socket.inet_ntoa(arp_detailed[8])

    if source_mac == MAC and dest_ip != "192.168.1.1":
        print "Dash button pressed!, IP = " + dest_ip
        start()
        toggleAll()

I needed to modify line 29 & 30 due to different socket info and 50 prevents the action from being fired more than once.