Connecting to Midea MSmartHome using a PC

cathodeRay · 2022-11-30T10:53:35Z

I may or may not have made some progress on this Holy Grail. The goal is to be able to download historical power consumption and capacity data etc to provide a record of this data plus calculated COPs over time. I have found a couple of python modules that claim to be able to connect to Midea appliances (the names are also links to the github pages): (1) midea-beautiful-air (2) msmart Both can see my Midea controller on my local network, and both report stuff like IP address, port, tokens and IDs and what looks like Midea's server: Using Midea cloud server:False but that link just gets {"msg":"调用业务系统异常(访问地址不存在) [no Route matched with those values]","code":40404} This indicates the url is something, but I am not using the right full url to connect. I can ping the device ip address but not connect to it... The connection strings produce authentication errors. I will carry on testing. If anyone else fancies working on this as well, I would very much welcome that.

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Derek M

(@derek-m)

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14/03/2023 8:16 pm

Posted by: @cathoderay

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@derek-m - thanks, will give the bytes 22 and 21 tests a try tomorrow.

On a general note, I think it might be worth continuing this in a new thread, as the thread title has become increasingly inaccurate. Maybe 'Connecting to a Midea Heat Pump from a PC'?

Yes that's fine.

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cathodeRay

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Topic starter 15/03/2023 8:42 am

Posted by: @derek-m

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So, I suppose the next test would be to change all the occurrences of 'outdoor_temperature' to 'byte_22', in all the relevant C3 files, including midea_devices.py.

Thinking about it, I have already done this (when I tested the individual bytes above 21 ages ago). The results were:

data_offset + 22 = 0 (fixed, stays at 0)
data_offset + 23 = 128 (fixed, stays at 128)
24 device stops working (fails to load)
25 device stops working (fails to load)
30 device stops working (fails to load)

Posted by: @derek-m

↑

A further test would be to change all occurrences of 'tank_actual_temperature' to 'byte_21' to see if it still produces data for 'tank_actual_temperature'.

I think I can predict that byte_21 will show the tank actual temperature, because the variable name is immaterial (the total mystery/porcine air speed tests). Nonetheless I did this, but briefly (because tank_actual_temperature is a live reading, one that I record and use), and sure enough

'byte_21': 49

which is what the wired controller currently shows the DHW temp to be (49 degrees).

Midea 14kW (for now...) ASHP heating both building and DHW

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cathodeRay

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Topic starter 15/03/2023 10:31 am

More HA f*ckwittery this morning, database corrupted again, I was working on HA or rather midea_ac_lan at the time but only editing python files as I have done before, so I very much doubt that was the cause. much more likely, HA was just being its usual delinquent self.

I'm almost out of patience with it, but am not yet quite angry enough to gleefully destroy it forever. In the meantime, this thread has wandered some way from its original title which includes MSmarthome (another crock of sheet) so it is time to start another thread with a more accurate title: Connecting Home Assistant to a Midea Heat Pump. You can find it here (<=link).

Midea 14kW (for now...) ASHP heating both building and DHW

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pensive

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22/11/2023 10:13 pm

@fishboy25uk I have been using the Comfort Home app since I had a Midea Heat pump installed 18 months ago. Pretty flakey ... often have to clear data and restart ... but working reasonably up until the last week or so when I have started to get network errors

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