Mitsubishi AC with Home Assistant?

[teltersat]

Hi there! First time posting in the forum!

I recently moved to the UK to this new built flat from NA, and trying to figure out the required components to integrate the AC and in-floor heating with Home Assistant. However, I am completely at a loss on figuring out how to do this properly - unlike in NA where you have more flexibility (from my point of view).

While I figured that for my in-floor heating I will need a separate hub (Heatmiser), I have no idea about the AC that I have. I can only see that I have a Mitsubishi PAR-33MAAG control panel, but the builders nor the management company want to provide information on the actual units themselves. I looked online and it seems that this unit is a dumb remote and there is a central controller that I do not have access to.

Has anyone been able to figure out if there is any way to control the AC by only tapping into the dumb remote itself with Home Assistant? Is anyone able to give me any pointers/hints into what I should be looking at?

Thanks in advance!

[Karosm]

@teltersat

Has anyone been able to figure out if there is any way to control the AC by only tapping into the dumb remote itself with Home Assistant?

Of course there is. But it would be much better to find out all the components you have there.
Ps. from NA might be obvious to you, but for others it might be…unknown.

[ferbulous (Shaq)]

@teltersat

Mitsubishi PAR-33MAAG

There’s a thread for mitsubishi electric ac local control

Mitsubishi AC with Wemos D1 Mini Pro

Just want to share that I have been reading comments, made sure I ordered the right parts and got it setup on my Mitsubishi AC today To share the link I got them: D1 Mini: https://www.aliexpress.com/item/32651747570.html?spm=a2g0o.order_list.order_list_main.101.67781802v3BCvC Make sure to ignore all the v4, v3, Pro versions. Take only the D1 Mini Type C or micro USB versions. [Cloudup] Connector (5P): https://www.aliexpress.com/item/1005002904897793.html?spm=a2g0o.order_list.…

If this remote is connected to the same CN105 port, then you might need to make a custom pcb that pass through the tx/rx/5v/gnd to the esp

[teltersat]

@ferbulous

If this remote is connected to the same CN105 port, then you might need to make a custom pcb that pass through the tx/rx/5v/gnd to the esp

No, unfortunately this remote only has two wires, and it does not have the same connector plug as the CN105 typically does. Guess I’m stuck until the builders provide additional information.

Thanks for the answers!

[TomAatjes]

If it has two wires it is using the M-Net protocol.
But depending on the indoor unit this converts to CN105 at some point.

If this is the case, you can connect something like the product below to it. Then you can keep using your wall remote and also control your heatpump using Home Assistant since this module passes through any signal from the wall remote as well.

ClimaControl - Mitsubishi Electric Air-to-Air HVAC

[teltersat]

The units are actually built into the ceiling, so I am going to have to investigate if they’re accessible from the two trap doors that I have access to. I will look into it and hopefully I can add that ClimaControl unit, which would solve all my problems!

Thanks for the pointers!

Edit: Sorry I got super excited and looked already - I have a PEFY-P50VMS1-E unit, which I have managed to find the control board layout here. However, I do not see the CN105 connector here according to this board layout sadly. Do you know of any options that I may have?