Various sensors are supported in MT-FW 4.34v. Not all of them are currently sufficiently described. Therefore, I will try to create a detailed description with the individual parameters for the respective sensors.
The most important common environmental data are: Temperature [°C], relative humidity[%rH], air pressure [hPa]
Further parameters are: Air quality, CO2 [ppm] and others.
| Type | IO | Addr | Measured values |
|---|---|---|---|
| BMP280 | I²C | 76 | T* [°C] - P [hPa] /T=[°C] /P=[hPa] BLE: ... |
| BME280 | I²C | 76 | T* [°C] - H [%rH] - P [hPa] /T=[°C] /H=[%rH] /P=[hPa] /Q=[hPa] BLE: ... |
| BME680 | I²C | 76/77 | T [°C] - H [%rH] - P [hPa] - GASres [kΩ] /T=[°C] /H=[%rH] /P=[hPa] /F=[m] /G=[kΩ] /V=3 BLE: ... |
| DS18B20 | 1-W | - | T [°C] /O=[°C] BLE: ... |
| MCU811 | I²C | 5A | CO2 [ppm] /C=[ppm] /V=2 BLE: ... |
- Addr in Hex
- /X = Identifier in POS-Msg (V=2 has priority over V=3)
- (*) = the temperature is used for internal compensation and is therefore slightly higher than the real environment.
- MCU811 WAK-GND connection in addition to I²C.
Currently, only one INA226(voltage[V]-current[A]-power[W] sensor in the 20A version with an RS=2 mΩ [R002]) is officially supported.
| Type | IO | Addr | Measured values |
|---|---|---|---|
| INA226 | I²C | 40 | /U=vbus[V], /I=vcurrent[A] /V=5 BLE: ... |
An MCP23017 16-pin I/O on I²C Addr=0x20 is supported.
The 16 IOs are identified by A0..A7, B0..B7. Control is possible via terminal, BLE & UDP (web client).
| Type | IO | Addr | Measured values as BLE-JSON package |
|---|---|---|---|
| MCP23017 | I²C | 20 | D{„TYP“:“IO“,“MCP23017″:true,“AxOUT“:“00000000″,“AxVAL“:“11111111″, „BxOUT“:“00000000″,“BxVAL“:“11111111″} |
| Parameter | |
|---|---|
| MCP23017 | {true | false} = recognized? |
| AxOUT | "00000000" = A7..A0, "1" = OUTPUT, "0" = INPUT |
| AxVAL | "00000000" = A7..A0, "1" = HIGH, "0" = LOW |
| BxOUT | "00000000" = B7..B0, "1" = OUTPUT, "0" = INPUT |
| BxVAL | "00000000" = B7..B0, "1" = HIGH, "0" = LOW |
Commands via terminal & BLE APP:
--iodelivers a JSON package on BLE--setio clearsets all IOs to INPUT--setio {A0..A7,B0..B7} {in | out}sets the function of the selected IO to INPUT or OUTPUT--setout {A0..A7,B0..B7} {high | low}sets the selected IO to HIGH or LOW
©️ 11.7.2025 by OE3WAS - Wolfgang