Does Faikin external temp "override" the internal probe readings?

[kameo4242]

Hi there,

I'd like to override the (useless) internal temperature probe reading with the ones coming from my zigbee external probes, which are accurate. I can relay them in Bluetooth using another ESP or mod the code to get it to read temp from a MQTT thread, or even buy external Bluetooth probes, whatever.

But, does Faikin readings entirely override the internal sensor values and instead the daikin unit will take the measures of the Faikin as its source of truth regarding temperature or is it only applicable to the "auto mode"? The Github description left me in doubt:

"or, works with BlueCoinT and Telink BLE temperature sensor as a remote reference in an auto mode"

[revk]

We can't actually override what the air-con unit sees. It would be great if we could.

So this only affects how the "Faikin" auto mode works. That is generally pretty good though and there are options and settings for how it works.

[kameo4242]

Thanks !

Ok, I understand how it works now. I've some Zigbee thermometers already and I was considering informing the Faikin through MQTT. I would post the value with HA and maybe patch the code to get the Faikin to read it from MQTT instead of directly a probe. (Which could be a generic solution for anyone having already zwave/zigbee/wifi temp probes)

[RaW79]

With regard to this topic may I ask for explenation of the function of thermref ?

What is the meaning of inlet and home temp? Do we have a possibility to adjust the percentage ENV-temp (by external sensor) instead of Home-Temp (internal sensor) with this parameter?

I cannot identify what is the exact meaning of inlet-temp here. Or is this the fluid-temp which comes by an inlet into the inside unit of the aircon?

Thanks!

[revk]

There are two temps, inlet and home. I think on my system there is a temp sensor on the wall mounted controller (home) and a temp sensor in the aircon inlet. The daikin settings allow home or inlet or 50/50, hence the setting. I suspect for most people not on a ducted system with a wall mount controller you can just have it using home.

But that sensor is intended to be "what the daikin is doing" so we can work out what reference the daikin is using and hence set targets a few degrees below our above.

[RaW79]

Hope I got you right. You have these 2 temps because of a seperated wall controller by daikin.

So e.g. for me without this seperated external daikin controller there is only 1 temperature and this themref setting not applicable because the Daikin uses always the home temperature.

Had a look to my mqtt message and there is no inlet temp as mentioned:

'''{
"protocol": "S21",
"ts": "2025-02-01T07:51:00Z",
"env": 21,
"target": 21.5,
"online": true,
"control": true,
"home": 23,
"heat": true,
"fanrpm": 941,
"comp": 48,
"outside": -0.5,
"liquid": 35.5,
"anglev": 46,
"Wh": 566400,
"power": true,
"mode": "H",
"temp": 27.5,
"demand": 75,
"fan": "A",
"swingh": false,
"swingv": true,
"econo": false,
"powerful": false,
"comfort": false,
"quiet": false
}'''

[revk]

That makes sense, so that setting should be 0 I think.

[RaW79]

Great. Thanks!