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Homely Smart Control now available for Mitsubishi

Air Source Heat Pumps (ASHPs)

Last Post by Majordennisbloodnok 1 month ago

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Toodles

(@toodles)

Famed Member Contributor

Joined: 3 years ago

Posts: 2632

Topic starter 09/02/2026 11:46 am

Just had notification from Homely: herewith link to compatibility list: https://www.homelyenergy.com/compatibility/?utm_medium=email&_hsenc=p2ANqtz-_ExrEJZwMbxM0yRwJHA7hKJxgQMGX_0qhL-JQzMZQz-Dl6dZ6t-m-re6XbOf7exGN-kNDmaxaPNgn4n6ACYC8lTOuMkOIKAwhUP_8ye0zBRExPql0&_hsmi=402676911&utm_content=402676911&utm_source=hs_email

And further Mitsi specific info here:

https://www.homelyenergy.com/homely-mitsubishi-heat-pump-integration/?utm_medium=email&_hsenc=p2ANqtz-_NaPdB750cRph_UT0cdbn2Tdbz8TupUgRDPLPTdOWHTntr1RKsaSkNCRx219Ky4Kg_HNDCCOdwaBBCGTev3lsV-kVi40ScmTY0S18x7Q55JHej8OY&_hsmi=402676911&utm_content=402676911&utm_source=hs_email

Regards, Toodles.

This topic was modified 1 month ago by Toodles

Toodles, heats his home with cold draughts and cooks food with magnets.

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Majordennisbloodnok

(@majordennisbloodnok)

Famed Member Moderator

Joined: 4 years ago

Posts: 1693

09/02/2026 1:43 pm

That is interesting, @toodles, and thanks for the update.

All that said, there are a few key details I think need to be highlighted which are either potential problems or my misunderstanding. Either way, they need to be addressed.

Homely specify that they need an extra bit of Mitsi kit installed - a MelcoBEMS Mini A1M module - which is a module that allows the flow temperature controller to talk modbus so that the Homely box can be connected to that module. Looking online I've seen prices for that module ranging between £133 and £207, although it obviously is possible to buy secondhand on eBay.
The modbus adapter is a little box that plugs into the CN105 socket in the FTC cabinet. I'm now quite familiar with that, having bought a little third party dongle that makes it easy to link with Home Assistant. The CN105 socket is also the socket used for plugging in a wifi adapter such as the MAC-587IF. Unlike the third party dongle, though, the Mini A1M module does not have a second pass-through CN105 socket, so where I can have a little box of tricks for connecting to Home Assistant or similar AND still have my heat pump talking with Mitsubishi's Melcloud cloud systems, it looks as if opting for Homely involves stopping using Melcloud altogether. Either control through Homely or via the Melcloud app but never both.
Because of the either/or choice of Homely or Melcloud, it will not be possible to have Homely controlling the heat pump and Melcloud giving the stats.

I hasten to add that this is not a criticism of Homely. From what I can see, this is entirely the result of Mitsubishi not designing their wifi adapter or their modbus adapter to allow operation in parallel.

105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"

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