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I added a non-wi-fi Mitsubishi AC to Home Assistant

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Re: I added a non-wi-fi Mitsubishi AC to Home Assistant

#71

If anyone is looking for something similar it's worth looking into A somewhat less complex solution that preserves all functionality. Use the IR receiver plus a broadlink IR Hub. You can meet all the goals here, run it all locally the only downside is no 2 way communication. So if you do change the thermostat via the wall it won't be reflected in your app.

You can add a camera pointing to the display and analyze the image. You would have a perfect galvanic separation for reasons.

Re: I added a non-wi-fi Mitsubishi AC to Home Assistant

#72

If anyone is looking for something similar it's worth looking into A somewhat less complex solution that preserves all functionality. Use the IR receiver plus a broadlink IR Hub. You can meet all the goals here, run it all locally the only downside is no 2 way communication. So if you do change the thermostat via the wall it won't be reflected in your app.

This project isn't very complicated, doesn't require extra power source, and doesn't beep every time you change the settings.

Re: I added a non-wi-fi Mitsubishi AC to Home Assistant

#74
post #4

I'm hoping to get a mini-split system installed soon and thought I might as well look for something with HA integration. It's not easy. Some manufacturers like Samsung actually want to charge you monthly for cloud integration! Completely out of the question obviously. I came across this, and Mitsubishi is supposed to be good anyway. I would prefer something that's actually supported but I can't seem to find any other…

My ideal system would be something that does matter over thread with zero external internet access. Matter over thread devices are all standardized so no proprietary app required, and the newer iphones have a thread radio built in so you can control them without even a hub.

I have my AC connected using Matter (over WiFi, not Thread) using esphome-matter, a relatively new extension to ESPHome + a small open PR [1]

Since it's running ESPHome you can easily verify everything it's doing.

Thread would be even better but this is good enough for me. 100x better than the original cloud app it came with. Still no proprietary app required, works on every platform.

[1] https://github.com/DavidvtWout/esphome-matter/pull/53

Re: I added a non-wi-fi Mitsubishi AC to Home Assistant

#75
post #64

These mini split inverter units seem to be good for +/- 1 C, but the 2 C swing can feel quite substantial. PID control seems to be lacking overall, the control laws seem to be more basic. In particular, my unit waits until temperature deviation from setpoint exceeds 1C before cycling on. If I want finer control, there are a few options I can think of: 1. Spoof the temperature, add a TEC , heater, cooler or something…

Would running the unit in Fahrenheit improve the sensitivity?

Re: I added a non-wi-fi Mitsubishi AC to Home Assistant

#77
post #30

Earlier quoted context omitted.

FYI this kind of thermostat is actually better. American style thermostat put your HVAC system in either on or off state (basically PWM), whereas this kind of communicating thermostat can tell the system what the temperature is, so they adjust power accordingly. I do wish they have standardized protocol though.

Single stage hvac systems tend to have better performance in the max capacity cooling cases (Texas) and last significantly longer than units that rely on non-linear electronic devices. The difference can be as extreme as 10+ years of service life. There are residential systems that were installed in the 80s and 90s that are still running fine today. The hermetically sealed scroll compressor is an engineering marvel.…

Single stage forced air / air handlers AC systems are basically only found in North America because they are so grossly inefficient and because most people in the rest of the world realize they can save money by not having all of their rooms ran off the same system. The rest of the world runs on mini splits for that reason.

Re: I added a non-wi-fi Mitsubishi AC to Home Assistant

#78
post #55

This is kinda unrelated but I learned while researching for my new AC that there are two Mitsubishi brands/companies, one is Mitsubishi Electric and the other is Mitsubishi Heavy Industrial. And their ACs are not the same, so just saying Mitsubishi AC probably could lead to problem. The one OP has is Mitsubishi Electric by the first photo.

Technically, they’re both part of the Mitsubishi Group, the former zaibatsu; there are number of other Mitsubishi companies in this conglomerate as well.

However, the Mitsubishi Pencil company is entirely unrelated to the Mitsubishi Group. Ironically, they share a very similar three diamond logo, which they registered and used years before Mitsubishi Group.

Re: I added a non-wi-fi Mitsubishi AC to Home Assistant

#79
post #30

Earlier quoted context omitted.

Single stage hvac systems tend to have better performance in the max capacity cooling cases (Texas) and last significantly longer than units that rely on non-linear electronic devices. The difference can be as extreme as 10+ years of service life. There are residential systems that were installed in the 80s and 90s that are still running fine today. The hermetically sealed scroll compressor is an engineering marvel.…

Single stage forced air / air handlers AC systems are basically only found in North America because they are so grossly inefficient and because most people in the rest of the world realize they can save money by not having all of their rooms ran off the same system. The rest of the world runs on mini splits for that reason.

I don't understand why it's so common for Europeans to act like they speak for the entire rest of the world outside of North America.

Re: I added a non-wi-fi Mitsubishi AC to Home Assistant

#80
post #51
post #45

Earlier quoted context omitted.

> Now, she opens her bedroom door, I get “kid is awake” alert on my phone, and the machine brews the coffee. Out of all of the smart home threads and articles I've read over the years this is the only sentence that made me wish I had it. It's genius

Until the kid uses the bathroom in the middle of the night and goes back to bed. Though the GP seems to not mind stale coffee so perhaps he won't care. Exceptions like the above make automations hard.

It seems pretty easy to throw in an earliest time to trigger it
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