Helios-P Pressure Sensor
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      Helios-P Pressure Sensor Payload Description

      Are you looking for the payload description for the Helios-P pressure sensor?

      Here you will find the payload description for the Helios-P sensor.

      Here you will find the table for a clear presentation:

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      Byte: 1-2
      Alias: Module key
      Description: module_key
      Valid for versions: All - basic payload, valid and available for all sensors of the Febris series
      Description:
      Byte 1

      • 4-bit MSB: Module code. For Mioty only telemetry module ‘Sentiface’, i.e. always 0x1.
      • 4 bit LSB: Major version. FW with the same major version but a larger minor version remain compatible with older decoders. However, the number of bytes may change!

      Byte 2

      • 4 Bit MSB: Minor version. New SW versions can gradually add new telemetry to the data packet.
      • 4 bit LSB: Sub/product version. In Helios, these bits encode the specific configuration of the connected sensors.

      Byte: 3
      Alias: Uplink Counter
      Name: uplink_counter
      Valid for versions: All - base payload, valid and available for all Helios series sensors
      Description: Protocol independent uplink counter that reaches a maximum value of 255. After this, the counter starts again at 0.

      Byte: 4-5
      Alias: Battery Voltage
      Name: internal_temperature
      Valid for versions: All - base payload, valid and available for all sensors of the Helios series
      Description: Current battery voltage in millivolts
      //Voltage in volts battery_voltage: (dataBytes[3] << 8 | dataBytes[4])/1000.0,

      Byte: 6
      Alias: Internal temperature
      Name: battery_voltage
      Valid for versions: All - base payload, valid and available for all sensors of the Helios  series
      Description: Internal temperature of the sensor + 128
      //Temp. in °C internal_temperature: dataBytes[5] - 128,

      Byte: 7
      Alias: Rel. humidity
      Name: humidity
      Valid for versions: All - base payload, valid and available for all sensors of the Helios series
      Description: Rel. humidity in %

      Byte: 9-10
      Alias: Dewpoint
      Name: dewpoint
      Valid for versions: All - base payload, valid and available for all sensors of the Febris series
      Description: Dewpoint in °C

      For versions: S-FEBR-XXXX-CO2-XXX

      Byte: 11-12
      Alias: Air pressure
      Name: pressure
      Valid for versions: S-FEBR-XXXX-CO2-XXX
      Description: Atmospheric pressure in hPa

      Byte: 13-14
      Alias: CO2
      Name: co2_ppm
      Valid for versions: S-FEBR-XXXX-CO2-XXX
      Description: CO2 value in ppm

      Byte: 15
      Alias: Alarm
      Name: alarm
      Valid for versions: S-FEBR-XXXX-CO2-XXX
      Description:
      Alarm variable:

      •  0: 0-1000ppm (green)
      • 1: 1000 - 2000ppm (yellow)
      • 2: 2000 - 5000ppm (red)

      Analogue to traffic lights, limit values adjustable

      Documentation Links

      You can find the links for the other Helios-P documentation here: