Forums

Forums
Renewable Heating
Air Source Heat Pum...
Real world connecti...
 
Notifications
Clear all

Real world connection to a heat pump over modbus

 
Page 5 / 5
Air Source Heat Pumps (ASHPs)
Last Post by Mosibi 5 months ago
52 Posts
9 Users
5 Reactions
4,177 Views
RSS
 ctw
(@ctw)
Active Member Member
40 kWhs
Joined: 6 months ago
Posts: 3
12/02/2024 6:55 pm  

@cathoderay thanks - I won't hold out too much hope on the FHP option then.


   
ReplyQuote
 Mosibi
(@mosibi)
Active Member Member
72 kWhs
Joined: 10 months ago
Posts: 3
13/02/2024 9:35 pm  

Posted by: @ctw
↑
  1. Is there any guidance out there on how to actually wire up the Midea controller? I did find this YouTube video which appears to show how to do this - is someone able to confirm this is correct, and not somethign specific to Homely?
  2. I've done some searching through all the documentation I have to hand, but don't appear to have anything that contains the modbus register, which I’ve seen referenced. Does anyone know where there is a copy of this online.

On my GitHub page you will find info about the connection and modbus registers.

https://github.com/Mosibi/Midea-heat-pump-ESPHome

 


   
ReplyQuote
cathodeRay
 cathodeRay
(@cathoderay)
Famed Member Moderator
6919 kWhs
Joined: 2 years ago
Posts: 1391
Topic starter 14/02/2024 8:33 am  

@mosibi - thanks for your contribution, looks like an interesting project! However, it does tie the user to using your hardware, ESPHome and Home Assistant, and not everyone (I for one) wants to be tied to Home Assistant.

I note that you have most if not all of the modbus register addresses in your heatpump.yaml file, starting at line 319. 

For historical reasons, I do have HA installed (the historical reason being I started out intending to use HA, and then decided otherwise) and by having HA installed, I also have a small Linux OS on the mini computer which I use to run the python scripts that do my monitoring and DIY auto-adaption control. The physical connection is a wired connection that has a RS485 to USB adadapter at the mini computer end, and the viewing of data and management of the mini PC is done from my main desktop computer over a wired local network.      

Midea 14kW (for now...) ASHP heating both building and DHW


   
Mars reacted
ReplyQuote
 Mosibi
(@mosibi)
Active Member Member
72 kWhs
Joined: 10 months ago
Posts: 3
14/02/2024 5:56 pm  

Posted by: @cathoderay
↑

@mosibi - thanks for your contribution, looks like an interesting project! However, it does tie the user to using your hardware, ESPHome and Home Assistant, and not everyone (I for one) wants to be tied to Home Assistant.

I note that you have most if not all of the modbus register addresses in your heatpump.yaml file, starting at line 319. 

The project self is indeed ESPhome based, but how you connect a modbus interface or information about the modbus registers is of course generic, hopefully @ctw is being helped with this.

Posted by: @cathoderay
↑

For historical reasons, I do have HA installed (the historical reason being I started out intending to use HA, and then decided otherwise) and by having HA installed, I also have a small Linux OS on the mini computer which I use to run the python scripts that do my monitoring and DIY auto-adaption control. The physical connection is a wired connection that has a RS485 to USB adadapter at the mini computer end, and the viewing of data and management of the mini PC is done from my main desktop computer over a wired local network.      

That’s a nice setup and gives you, as a tinker, all the control you need and want. Not all people have the knowledge or energy to handle such a setup, but still want the same level of insight and control. For those people a less DIY solution using an ESPhome solution, together with Home Assistant, would fit better.

 


   
MikeFl reacted
ReplyQuote
Page 5 / 5
Forum Jump:
  Previous Topic
Next Topic  



Share:

Join Us!

Latest Posts

Members Online

 No online members at the moment

x Powerful Protection for WordPress, from Shield Security
This Site Is Protected By
Shield Security →