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Joined: Jan 20, 2022
Last seen: Aug 14, 2025

Topics: 16 / Replies: 2425

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RE: Connecting Home Assistant to a Midea Heat Pump

Yes. If you've only got one RS485 port on the end of the cable, then you won't need a terminating resistor. I'm currently experimenting using a scre...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Connecting Home Assistant to a Midea Heat Pump

Yes of course I'll share what results I get.But as I said, I've only just imported these modules. They're still sat on the workbench, not connected to...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Connecting Home Assistant to a Midea Heat Pump

If you want to place a few temperature or voltage sensors around your heat-pump, you could consider using an analogue acquisition module with a Modbus...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Connecting Home Assistant to a Midea Heat Pump

Oh great - more hardware questions. 😀 FTP is well beyond the cable spec you're after. But it'll do ok.Let's remember that RS485 gets deployed in re...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Numerous issues – 11kW Daikin Altherma 3

I do have whole-house MVHR.I'm going to avoid commenting on that whilst we discuss the heating system. Let's remember @newhouse87 that although we a...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Numerous issues – 11kW Daikin Altherma 3

That's why @derek-m suggested that you're "running it like a gas boiler". 😉 You don't control a heat-pump with periods of being "on" or "off" using...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Numerous issues – 11kW Daikin Altherma 3

Returning to your earlier photo; do these UFH pipes all go directly into the concrete floor? ... or are most of them running through pipe insulati...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Numerous issues – 11kW Daikin Altherma 3

@newhouse87 As I don't yet have a heat-pump, I'm unable to comment on the sound. But I could comment on the inappropriate approach to wiring the act...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Connecting Home Assistant to a Midea Heat Pump

It's usually the case that the USB adaptor end 'offers' the 120R impedance by default. You therefore need to place that matching resistor at the oth...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Connecting Home Assistant to a Midea Heat Pump

You'll only need one 120R resistor @cathoderay - at the far end of the RS485 line. 🤔 I've been assembling a range of Modbus devices over the past ...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Numerous issues – 11kW Daikin Altherma 3

@newhouse87 - clarifications..... ... take care when reading the questions here because we don't want to make incorrect assumptions. 1:@derek-...

2 years ago

Forum

Air Source Heat Pumps (ASHPs)

RE: Say hello and introduce yourself

@alan-m - if you like the sound of what @cathoderay is saying, you might want to get an energy meter installed to monitor the electricity supply to th...

2 years ago

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