Writing to Zigbee devices development cluster?

Using ZHA with a Conbee II and a Sinope thermostat (TH1300ZB). I’ve pulled over the custom_component from a dev branch that includes climate support in ZHA. Thermostat works perfectly but the only, albeit small, issue I have is that i’d like the clock on the thermostat to display 12h time vs. 24h time. From what I have read on Sinope’s site changing the value is only supported through their app/hub combo.

I have dug around and think i’ve found the data to set the bit to switch these settings, however, under the ZHA cluster view in HA the manufacturerspecificcluster doesn’t return any values.

This is the location that should contain the switch bit for 12h/24h:
(0xFF01, 0x0114, 0x30, 0x0001)

What I’m wanting to know, is there a good/easy way to set this data manually? I have done a bunch of searching but can’t seem to find anything.

Any help would be appreciated!


I am looking for the same information. If not then we will have to run them with Zigbee2mqtt

You probably have to ask a question in an issue for zigpy -> https://github.com/zigpy/zigpy or https://github.com/Adminiuga/zha_custom

Did you ever figure this out? I am in the same boat and want to change the time format and backlight format.

I would also be interested in knowing that info