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: