Contribution: Samsung ASHP NASA link <-> MQTT bridge (Home Assistant)

Hardware Heatpump
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Dear all,
After a few weeks playing with my ASHP Samsung Mono Gen 7 R290 Gen7, I’m finally having a nice step done.
Although chilling outside temperature have not reached us (just yet). And therefore I don’t know if my ASHP DIY setup is having a good CoP. I’m willing to share with you my latest dev around the samsung monitoring/controlling.

Here is the repository I’ve started: GitHub - 70p4z/samsung-nasa-mqtt: Bridge for home assistant to rule your EHS
It’s a python tool, meant to run on raspberry (or other SBC), which connects the NASA link on F3/F4 connector, the link normally used to wire remote controllers.
I was not satisfied with the remote controller unability to go wireless. And therefore replaced them with home assistant + mqtt + a few homemade wireless temperature sensors.
The project will soonishly comes with a PCB board to connect the raspberry on one side (probably USB serial converter) and the F3/F4 connectors.
I’m currently completely avoiding MWR controller (they’re disconnected), and replaced them with the python.

I’ve exhibiting many monitorable data from the NASA link (temps/power/settings) but I’m willing to extends if anyone requires changes.

Here is a screen shot of the currently exhibited sensor/controls

The code is not yet that great, but it works nicely.

I hope this would help anyone :slightly_smiling_face:
Cheers,
Topaz

4 Likes
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Just added settings than could help experimenting (in a monitored fashion)

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Tell me if you see anything that may be useful to control/display/monitor

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FIrst time the space heating gets on this year.
Here is a screenshot of HA stats.
No cycling for an hour, even though temperature outside is quite high (13C), and a CoP starting at 5.7, finishing at 4.7, with a very low power input (~400Wh).

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Cheers,