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How to add a barometric pressure altitude sensor to a softRF/ T-Motion (STM32)?

This section instructs on how enrich your Stratux (OGN) Flarm with a barometric pressure altitude sensor, when using a softRF/ T-Motion (STM32) to send you aircraft's position to others.

This is needed to send your barometric pressure altitude rather than GPS altitude to other aircrafts and solves the problem explained here

VCC to 3V3 power
SCL to PB6
SDA to PB7


Original Source: https://github.com/b3nn0/stratux/wiki/Pressure-Sensor-(BMP280)