Controlling LIFX Smart Light Bulbs using Python

LIFX smart light bulbs can be controlled entirely on the local wi-fi network without requiring use of any cloud services.

The following Python example uses the LifxLAN module to perform the following actions:

• Scans the local network and lists the names of all of the LIFX bulbs found
• Turns the bulb called “Bedroom” on
• Changes the colour of the bulb to soft white
• Turns the bulb off

from lifxlan import LifxLAN
import time

if __name__ == "__main__":

	#Enable us to refer to light objects by name	
	light_list = dict()

	lan = LifxLAN()

	#Scan the local network and enumerate the list of available LifX bulbs
	for light in lan.get_lights():
		if light.is_light():
			light_name = str(light.get_label())
			light_list[ light_name ] = light
			print(f'Found light {light_name}')

	#Turn the bedroom light on
	light_list["Bedroom"].set_power(1);
	
	time.sleep(3)
	
	#Set the bedroom light to a warm white colour at 50% brightness
	#Parameters: hue (range: 0-65535), saturation (range: 0-65535), brightness (range: 0-65535), Kelvin (range: 2500-9000)
	light_list["Bedroom"].set_color( (0, 0, 32768, 3200) )
	
	time.sleep(3)
	
	#Turn the bedroom light off
	light_list["Bedroom"].set_power(0);

Errors

Note, that at the time of the writing the version of the LifxLAN module in PyPi (1.2.7) seems to have a bug in it. This appears to be due to a change in the module “bitstring” which introduced breaking changes in version 4.

This results in the following exception:

bitstring.exceptions.CreationError: Token with length 64 packed with value of length 0.

A solution is to rollback to a version of bitstring that is less than version 4.

pip install bitstring==3.1.9
pip install LifxLAN