config.py

import datetime


# (time, mired, brightness)
TIMES = [
	(datetime.time(hour=8, minute=0), 400, 254),
	(datetime.time(hour=10, minute=0), 200, 254),
	('PRESUNSET', 400, 254),
	('SUNSET', 500, 254),
]

# Latitude and Longitude of where we are (used to calculate sunrise/sunset)
LATITUDE = XXX
LONGITUDE = XXX

# Fingerprint of the Hue hub's SSL certificate (allows us to pin the certificate and thus prevent MITM)
FINGERPRINT = "XXX"

# Our app's username on the Hue hub
APP_USERNAME = "XXX"

main.py

import requests
from requests_toolbelt.adapters.fingerprint import FingerprintAdapter
import sys
from suntime import Sun
import datetime
import config
import time



def run():
	# Discover the Hue hub's local IP address
	# Note that Hue doesn't recommend doing it this way; this is just easy and a hack.
	try:
		r = requests.get("https://discovery.meethue.com/")
		ip_address = r.json()[0]["internalipaddress"]
	except Exception as e:
		print("WARNING: Unable to talk to discovery.meethue.com:")
		print(e)
		print("WARNING: Using default IP")
		ip_address = "192.168.1.190"

	while True:
		update_scenes(ip_address)
		time.sleep(15*60)


def update_scenes(ip_address):
	# SSL certificate pinning by requiring the fingerprint to match
	s = requests.Session()
	s.mount(f'https://{ip_address}', FingerprintAdapter(config.FINGERPRINT))

	# Calculate settings for the current time of day
	now = datetime.datetime.now().time()
	desired_state = get_state_for_time(now)

	# Find all Circadian scenes
	r = s.get(f"https://{ip_address}/api/{config.APP_USERNAME}/scenes", verify=False)
	circadian_scenes = r.json()
	circadian_scenes = {k:v for (k,v) in circadian_scenes.items() if v['name'] == 'Circadian'}

	# Update all Circadian scenes
	for scene_id, scene in circadian_scenes.items():
		states = {}

		for light in scene['lights']:
			states[light] = {'ct': desired_state[1], 'on': True, 'bri': desired_state[2]}
		
		r = s.put(f"https://{ip_address}/api/{config.APP_USERNAME}/scenes/{scene_id}", verify=False, json={"lightstates": states})
		print(r.json())


def get_state_for_time(now):
	sunset = Sun(config.LATITUDE, config.LONGITUDE).get_local_sunset_time()
	sunset = datetime.time(hour=sunset.hour, minute=sunset.minute)

	previous = config.TIMES[-1]

	for t in config.TIMES:
		if t[0] == 'PRESUNSET':
			t_time = datetime.time(hour=(sunset.hour - 2), minute=sunset.minute)
		elif t[0] == 'SUNSET':
			t_time = sunset
		else:
			t_time = t[0]
		
		if now > t_time:
			previous = t
			continue
		
		break
	
	return previous



if __name__ == '__main__':
	run()