Thermal engine (function 28)

A combustion engine, reported through its MUXEN interface. It publishes what an engine panel shows — RPM, load, torque and running hours — plus coolant, oil and fuel readings and the gear the transmission is in.

Published only — the command handler exists in source but is commented out. All frames expireAfterSec: 30.

state enum: off, on.
Transmission state enum: forward, neutral, reverse.

Published

`device/28/<i>/life`

metadata adds counter.

`data` field	Type	Unit	Description
`state` / `stateCode`	string / int	—	Engine state (enum)
`bindToParc`	int	—	Parc binding id
`rpm`	number (0 dec)	rpm	Engine RPM
`curRatedRpmrent`	number (0 dec)	rpm	Rated RPM (key misspelled in source)
`PercentLoad`	int	%	Engine load
`PercentTorque`	int	%	Engine torque

json

{
  "data": {
    "state": "on",
    "stateCode": 1,
    "bindToParc": 1,
    "rpm": 2200,
    "curRatedRpmrent": 3000,
    "PercentLoad": 55,
    "PercentTorque": 48
  },
  "metadata": {
    "rxdate": "2026-06-17T14:30:45.123Z",
    "rxTimestamp": 1781793045,
    "expireAfterSec": 30,
    "counter": 4
  }
}

`device/28/<i>/state_1`

`data` field	Type	Description
`Hourmeter`	int	Hour meter
`CoolantPressure`	number (0 dec)	Coolant pressure (raw)
`CoolantTemperature`	number (0 dec)	Coolant temperature (raw)

`device/28/<i>/state_2`

`data` field	Type	Description
`OilPressure`	number (0 dec)	Oil pressure (raw)
`OilTemperature`	number (0 dec)	Oil temperature (raw)
`FuelRate`	number (0 dec)	Fuel rate (raw)
`FuelPressure`	number (0 dec)	Fuel pressure (raw)

`device/28/<i>/transmission_gear`

`data` field	Type	Description
`state` / `stateCode`	string / int	Gear (enum)
`OilPressure`	number (0 dec)	Oil pressure (raw)
`OilTemperature`	number (0 dec)	Oil temperature (raw)

bash

mosquitto_sub -h 127.0.0.1 -t 'device/28/+/#' -v

Thermal engine (function 28) ​

Published ​

device/28/<i>/life ​

device/28/<i>/state_1 ​