A friend recently asked for my help with some reverse engineering. They wanted to know how difficult it would be to re-use some components from a lot of refurbished blood pressure cuffs they had recently acquired. Sounds easy, right? At a high level, there’s going to be: a pump and a pressure sensor and a valve a micro controller to run the show a way to communicate the readings back to the user In the interest of expediting things, I asked for the FCC IDs from the devices so I could have a look inside… and was surprized to find out that there was no FCC listing for this particular model from the lot.

This is a super quick “because the official docs didn’t make it super clear so here’s what ended up working for me” post. After some very disappointing WiFi connectivity issues, I settled on a Zwave based thermostat to replace the Venstar thermostat. After installing the Honeywell TH6320 and connecting it to the ZwaveJS gateway, a new `climate`` entity appeared in Home Assistant. From there, I was able to see/control: The current thermostat setpoint/mode The current air temp and humidity The current battery level / if the thermostat thought the battery was low I knew that it was possible to adjust the the screen backlight from the thermostat itself so I was a bit confused when there was no such configuration entity exposed in Home Assistant.