Hi and welcome to the MySensors community @augusthalverson ! In general, you just set the color in your controller. It works the same way regardless of which type of gateway you are using, so there is nothing specific about mqtt. You might be able to get some inspiration from https://forum.mysensors.org/topic/4934/wall-mounted-mood-light-v2

@davy39 said: up ! Could anyone help me to configure domoticz & mysensors in order to control analog RGB led strip ? Is this option working? Or perhaps a RGBW strip...