Write doesn't work anymore

[bmpalmeida]

Hello,

I was using the spiciermodbus2mqtt from some time, and was always working.

I updated the other day the raspbian to bookworm, and update the spiciermodbus2mqtt to the latest version (i'm not completely sure which version i was at) and now i cannot write anymore.

Any ideas of what could go wrong?

MQTT LOG:Received PUBLISH (d0, q0, r1, m0), 'mc6_music_teste/mc6/set/SetTemperature', ... (3 bytes)
Writing to device mc6, Slave-ID=16 at Reference=64 using function code 6 FAILED! (Devices responded with errorcode IllegalFunction. Maybe bad configuration?)

[mbs38]

Can you post your configuration for that please?

[bmpalmeida]

"type","topic","col2","col3","col4","col5","col6"

poll,mc6,16,0,22,holding_register,15
ref,RoomTemp,0,r
ref,FloorTemp,1,r
ref,Humidity,2,r
ref,4FCUHeatValveStatus,3,r
ref,4FCUCoolValveStatus,4,r
ref,2FCUValveStatus,5,r
ref,HighFanStatus,6,r
ref,MedFanStatus,7,r
ref,LowFanStatus,8,r
ref,HeatingOutputStatus,9,r
ref,HWHeatStatus,10,r
ref,HWHotWaterStatus,11,r
ref,TouchLock,12,r
ref,WindowOpenFunction,13,r
ref,HolidayFunction,14,r
ref,HoldingFunction,15,r
ref,BoostFunction,16,r
ref,FloorOverheat,17,r
ref,DeviceType,18,r
ref,AuxiliaryHeat,19,r
ref,FanType,20,r
ref,SystemEorr,21,r

poll,mc6,16,60,27,holding_register,15
ref,TemperatureFormat,60,rw
ref,Status,61,rw
ref,SystemMode,62,rw
ref,FanSpeed,63,rw
ref,SetTemperature,64,rw
ref,Away,65,rw
ref,AwayTemperature,66,rw
ref,HoldEndTimeHi,67,rw
ref,HoldEndTimeLow,68,rw
ref,HoldingTemperature,69,rw
ref,HolidayStartTimeHi,70,rw
ref,HolidayStartTimeLow,71,rw
ref,HolidayEndTimeHi,72,rw
ref,HolidayEndTimeLow,73,rw
ref,OptimumStart,74,rw
ref,BoostEndTimeHi,75,rw
ref,BoostEndTimeLow,76,rw
ref,Boost,77,rw
ref,TouchPanelLock,78,rw
ref,LockPin1,79,rw
ref,LockPin2,80,rw
ref,LockPin3,81,rw
ref,LockPin4,82,rw
ref,MaxSetTempLimit,83,rw
ref,MinSetTempLimit,84,rw
ref,FloorTempLimit,85,rw
ref,ScheduleMode,86,rw

[bmpalmeida]

I'm having errors on 61, 62, 63, 64.

Only writing, reading works good as always

[mbs38]

Well it seems like your device does not support function code 6 (preset single register). Unfortunately Modbus is very often not thoroughly implemented. I have seen a couple of devices that do not support function code 16 (write multiple registers) when writing only one register. Since that seemed to be common I changed spiciermodbus2mqtt to always use function 6 when writing only one register: 687b9a9

A device that only supports function code 16 that is a new quirk. I will add a a command line option to exclude specific function codes.

[bmpalmeida]

Wow,

Indeed modbus implementations are a mess.

I roll back temporarily to version 0.65 and it's working.

Thanks so much for the debug, and for the project, is being working very well.

[mbs38]

Please use the command line option --avoid-fc6
Fixed with 6e0e6b5