Problem set heat temperature

[mochitoju]

Hi there,

i've the "modul" now since 2 month for my Daikin Altherma 3 (new model) and now its the first time to start testing heating.
i can not set any heating temperature (Room Room_Heating) above 20,4 degrees.
-> "only allowed between 12 and 20,4 degrees"

in cooling i can set temperature till 27 degrees.

anybody who can help?
in Daikin Onecta HomeAssistant it would be possible to set the correct temperature till 32 degrees.

gtx, juergen

[mochitoju]

sensor.bridge1_fieldsettings_3_06_a3212_temp_range_room_heating_max
= 20.4

so, its obtained from Daikin, but i cannot find where i can change it

[Arnold-n]

Hi Juergen,

You cannot change this value - by coincidence I learned yesterday that some field settings, in particular the stepsize for certain field settings, are not decoded properly on some systems, and I think this is the cause of your problem too.

Can you please share the MQTT reported values of the following 4 (or 8) settings?

P1P2/P/P1P2MQTT/bridge0/F/2/3_06_A3212_Temp_Range_Room_Heating_Max
P1P2/P/P1P2MQTT/bridge0/F/2/3_07_A3211_Temp_Range_Room_Heating_Min
P1P2/P/P1P2MQTT/bridge0/F/2/3_08_A3214_Temp_Range_Room_Cooling_Max
P1P2/P/P1P2MQTT/bridge0/F/2/3_09_A3213_Temp_Range_Room_Cooling_Min
P1P2/P/P1P2MQTT/bridge0/F/4/3_06_A3212_Temp_Range_Room_Heating_Max
P1P2/P/P1P2MQTT/bridge0/F/4/3_07_A3211_Temp_Range_Room_Heating_Min
P1P2/P/P1P2MQTT/bridge0/F/4/3_08_A3214_Temp_Range_Room_Cooling_Max
P1P2/P/P1P2MQTT/bridge0/F/4/3_09_A3213_Temp_Range_Room_Cooling_Min

On my system these report:

P1P2/P/P1P2MQTT/bridge0/F/2/3_06_A3212_Temp_Range_Room_Heating_Max {"val":30.0, "min":18, "max":30, "stepsize":0.5, "bits":"00", "bitsstep":"0x01"}
P1P2/P/P1P2MQTT/bridge0/F/2/3_07_A3211_Temp_Range_Room_Heating_Min {"val":12.5, "min":12, "max":18, "stepsize":0.5, "bits":"00", "bitsstep":"0x01"}
P1P2/P/P1P2MQTT/bridge0/F/2/3_08_A3214_Temp_Range_Room_Cooling_Max {"val":35.0, "min":25, "max":35, "stepsize":0.5, "bits":"00", "bitsstep":"0x01"}
P1P2/P/P1P2MQTT/bridge0/F/2/3_09_A3213_Temp_Range_Room_Cooling_Min {"val":15.0, "min":15, "max":25, "stepsize":0.5, "bits":"00", "bitsstep":"0x01"}

with a stepsize of 0.5C (which is configurable on my system as 0.5C or 1.0C). I think your system has a stepsize of 1.0C (fixed) whereas it seems to be wrongly decoded as 0.2C. I would be interested to see the value of your "bits" and "bitsstep" in these messages to see if they are needed in the field setting decoding.

[mochitoju]

3_06_A3212_Temp_Range_Room_Heating_Max = {"val":20.4, "min":18, "max":20, "stepsize":0.2, "bits":"00", "bitsstep":"0x40"}
3_07_A3211_Temp_Range_Room_Heating_Min = {"val":12.0, "min":12, "max":13, "stepsize":0.2, "bits":"00", "bitsstep":"0x40"}
3_08_A3214_Temp_Range_Room_Cooling_Max = {"val":27.0, "min":25, "max":27, "stepsize":0.2, "bits":"00", "bitsstep":"0x40"}
3_09_A3213_Temp_Range_Room_Cooling_Min = {"val":15.0, "min":15, "max":17, "stepsize":0.2, "bits":"00", "bitsstep":"0x40"}

[mochitoju]

mhm, i think i could change the value to more than 20 in the beginning (also a friend of mine have the same problem) - maybe something changed according a firmware update of Daikin?

[Arnold-n]

Quite possibly - it seems Daikin now uses a mantissa which can be 1.0 which I haven't seen in the past. I am updating the firmware and hope that will solve it.

[mochitoju]

little update.

• rebuild mqtt
• changed field_settings > RT > LT and back to RT
• temperature range to 30 degrees possible!

[Arnold-n]

Seems weird, but I think this happens because the rebuild-mqtt action (with current 0.9.53) will work only for a few minutes (it uses 30 as a best-guess value, while waiting for the real max) before it then changes back to 20.4.

Just mailed you a new firmware 0.9.54, which should solve it. Daikin seems to use 10E-1 instead of 1E0 for certain step sizes.

[Arnold-n]

P1P2MQTT-bridge-v0.9.54rc1-Daikin-E.ino.bin should decode 10E-1 step size correctly.

[mochitoju]

Seems weird, but I think this happens because the rebuild-mqtt action (with current 0.9.53) will work only for a few minutes (it uses 30 as a best-guess value, while waiting for the real max) before it then changes back to 20.4.

Just mailed you a new firmware 0.9.54, which should solve it. Daikin seems to use 10E-1 instead of 1E0 for certain step sizes.

Problem seem to be solved.

P1P2MQTT-bridge-v0.9.54rc1-Daikin-E.ino.bin should decode 10E-1 step size correctly.

is this the same file or a diffferent one/version?

Thank you much for your quick solution!

[Arnold-n]

It's the same, except for the version itself.