Temperature probe - ShikOfTheRa/scarab-osd GitHub Wiki

MWOSD now supports a directly connected hardware temperature sensor - LM35

Configuring MWOSD - non Mavlink users

By default the temperature support is enabled in MWOSD from 1.8.2 onwards.

Configuring MWOSD - Mavlink/Ardupilot/PX4

• MAvlink provides temperature within its data stream from the FC.
• If this is not a sensor reading required, a directly conencted LM35 can be used.
• To enable this, a custom install with Arduino is required.
• #define USE_TEMPERATURE_SENSOR will need to be enabled in config.h
• #define TEMPERATUREMAX 50 sets a Temperature warning value of 50

Calibration

• Calibration values need to be adjusted. Dafaults are approx values.
• Typically require to set value to 0.
• Adjust "AUX zero calibration" to get correct calibrated temperature.
• 931 should be starting value if using a 1.1v reference voltage.
• 204 should be starting value if using a 5v reference voltage.

Hardware Connection

• Connect the LM35 as per the diagram at the following links:
• Generic connection diagram
• AeroMax OSD
• The default "Aux" pin is A1 - or Amperage pin on the minim OSD hardware.
• For Aeromax OSD hardware the Aux pin is A6 leaving Amperage pin free.