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cathodeRay
cathodeRay
@cathoderay
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Illustrious Member
Joined: Feb 28, 2022
Last seen: Sep 11, 2025
Profile Activity
Topics: 17 / Replies: 2129
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RE: Real world connection to a heat pump over modbus

Yikes, it has suddenly got cold! Heating on just after 7am this morning, and here's a preview of what's to come in this thread: a chart of the first f...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Heat pumps and on/off working - starting to quantify it

Hopefully Derek will survive, and be able to tell us what the experience felt like.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Topic
Real world connection to a heat pump over modbus
2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Replies: 58
Views: 13405
Reply
RE: Connecting Home Assistant to a Midea Heat Pump

Just for the record, here is a comparison of the two ways I have tried to connect to a Midea heat pump, firstly all in Home Assistant using the midea_...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Local monitoring and control of inverter - gaps in understanding

@majordennisbloodnok - I think your problem is generically the same problem that I had, how to make a working physical connection to a modbus device, ...

2 years ago
Forum
Solar Photovoltaic (PV)
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RE: Samsung ASHP scheduling help

That makes sense, and then you set up your own adaptive WCC. It will be very interesting to have feedback on how you get on.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung ASHP scheduling help

I think that is going to be the problem - won't the internal Samsung control circuits constantly set the LWT to what it thinks it should be, and so ov...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung ASHP scheduling help

That's a pity. Luckily the Midea manual does document the registers to set (and get) the weather comp curve endpoints (complete with typos), and a qui...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Samsung ASHP scheduling help

As I think you know, I am planning to do something similar (control via modbus, using python plus minimalmodbus) with my Midea heat pump. Just a thoug...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Connecting Home Assistant to a Midea Heat Pump

@leichat - very useful. It looks like it has a direct modbus connection. From 3:17 in the video: Modbus RTU / RS485 connections are two wire (and ...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: A Beginner's Guide to Heat Pump Monitoring Reloaded (v2)

I've been waiting for the heating season to start, once the heating is on I want to check and double check my monitoring system works as it should do,...

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
Reply
RE: Connecting Home Assistant to a Midea Heat Pump

Excellent idea.

2 years ago
Forum
Air Source Heat Pumps (ASHPs)
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