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Melpump Users Anywhere?

bontwoody · 2025-10-27T15:53:52Z

Ive just installed a dongle that allows me to monitor and communicate with an Ecodan through Melpump. Its a snip at £35 but there isnt a lot of documentation I can find. Does anyone on here use it? Here is an example of its reports for anyone interested.

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Air Source Heat Pumps (ASHPs)

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Majordennisbloodnok

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28/10/2025 11:43 am

Apologies, @davidalgarve; cross posted.

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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Morgan

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28/10/2025 11:45 am

@majordennisbloodnok I actually have Home Assistant Green up and running. Haven't a clue what to do with it, though. 🤣

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

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Majordennisbloodnok

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28/10/2025 11:49 am

Posted by: @morgan

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@majordennisbloodnok I actually have Home Assistant Green up and running. Haven't a clue what to do with it, though. 🤣

He, he

If you wanted to give it a go, I'm happy to talk you through it. No pressure, though.

"Semper in excretia; sumus solum profundum variat"

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Morgan

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28/10/2025 12:41 pm

@majordennisbloodnok Let's give that a try, just for a laugh and so long as you don't get shouty when I fail miserably. 😊

Retrofitted 11.2kw Mitsubishi Ecodan to new radiators commissioned November 2021.
14 x 500w Monocrystalline solar panels.

2 ESS Smile G3 10.1 batteries.
ESS Smile G3 5kw inverter.

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Majordennisbloodnok

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28/10/2025 1:27 pm

Posted by: @morgan

↑

@majordennisbloodnok Let's give that a try, just for a laugh and so long as you don't get shouty when I fail miserably. 😊

Nope, no shouting from me.

What I got was the cable and gizmo @bontwoody posted earlier

Posted by: @bontwoody

↑

@hcas So the answer from Mitsu was:

To Confirm you can monitor the PAC-IF06 FTC5 systems via the MELCloud.

Would this be a suitable connector?

https://www.ebay.co.uk/itm/326373657740?var=515493740627

It's the Wifi Gen 2 with Melcloud port.

Before you actually buy it, though, let's get Home Assistant ready, 'cos if you change your mind in the middle of that then you still haven't lost the cost of the gadget.

So the steps are as follows:

Open up Home Assistant in your browser (probably by going to http://homeassistant.local:8123)
On the left hand bar, go down towards the bottom and find the cog that, when you click on it, will open Settings.
Now click on Add-ons. On the Add-ons page, you'll have blue button in the bottom left marked Add-On Store; click that button.
You can now either look on that page for or use the search facility to find a particular addon called Mosquitto broker. Click on that.
On the ensuing page, you'll see four words at the top - Info, Documentation, Configuration and Log. Whilst you're on the Info tab, you can click "Install". You'll need to wait for a short while whilst it installs and starts up, then, once it's running, make sure the options "Start on boot", "Watchdog" and "Autoupdate" are enabled.
Now, switch to the Configuration tab and, under the top section (marked Logins), click Add. You can add a username and password, and this is what you'll be using later when you get your gadget, so make a note of those credentials and keep them safe.
Once you've added the new login, switch back to the Info page and click Restart. It's not strictly necessary, I think, but I prefer to give it a fresh start after every config change just to keep things simple.

At this point you're done with Home Assistant for now. If you've got that far, you can now go back to the link above and buy your gadget. Shout once you're done, or if anything I've written doesn't make sense.

"Semper in excretia; sumus solum profundum variat"

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Morgan

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