dash.py

from scapy.all import *
from lifxlan import *
import sys
from copy import copy
from time import sleep, time

#find all our lights
lifx = LifxLAN()
bulbs = lifx.get_lights()

#Find the bulb we want
for bulb in bulbs:
        if bulb.mac_addr == 'your:bulb:mac:address:here':
                target_bulb = bulb

#detect ARP packet from button
def arp_display(pkt):
  if pkt[ARP].op == 1: #who-has (request)
    if pkt[ARP].psrc == '0.0.0.0': # ARP Probe
      if pkt[ARP].hwsrc == 'your:button:mac:address:here': # Huggies
        breathe_light(target_bulb)
        print "Pushed Huggies"
      else:
        print "ARP Probe from unknown device: " + pkt[ARP].hwsrc


#fade the bulb in and out
def breathe_light(bulb):
        half_period_ms = 1500
        duration_secs = 30
        print("Breathing...")

        #turn the bulb on
        bulb.set_power(1)
        try:
                start_time = time()
                while True:
                        cyan = [29814, 65535, 65535, 3500]
                        half_bright = int(cyan[2]/2)
                        dim_cyan = [29814, 65535, half_bright, 3500]
                        bulb.set_color(cyan, half_period_ms, rapid=True)
                        sleep(half_period_ms/1000.0)
                        bulb.set_color(dim_cyan, half_period_ms, rapid=True)
                        sleep(half_period_ms/1000.0)
                        if time() - start_time > duration_secs:
                                raise KeyboardInterrupt
        except KeyboardInterrupt:
                print("Leaving bulb on")
                bulb.set_color( [29814, 65535, 65535, 3500])



print sniff(prn=arp_display, filter="arp", store=0)