I would like to create an individually addressable led strip hardware. An integration with HA works well over MQTT (light, switch & sensor options tested so far), I am able to control light from the GUI (RGB, brightness, color temperature) and read random sensor data.
For addressable leds, hardware would need to know the strip length, mainly number of leds in a strip. Based on that, hardware is able to send required number of pulses to the strip.
Is there a way to allow configuration from the GUI (to enter number of leds in a strip) or is the only way configuration.yaml? And if yes, what’s the best way to get this info from HA to the device after device connects to MQTT broker?
I have few WS2812B strips laying around, that could be a nice addon 
Thanks