I've created a custom #ZHA quirk for #Buschjäger 6737 and 6737/01 #ZigBee Light Link wall transmitters. Most time I spend figuring out the correct bindings. During this I've fixed a bug in #zha_toolkit https://github.com/mdeweerd/zha-toolkit/pull/330 (which has been merged).
Find my quirks and docs at https://codeberg.org/sarmbruster/custom_zha_quirks_buschjaeger
#homeassistant