BMP280 - external barometer

The External barometric module is used for height measurement. It is often already part of the flight controllers, but this is not always the case. The barometer altitude measurement comes in handy especially in combination with the GPS module and automatic return to the launch. For non-drone applications, the temperature and humidity measurement function also comes in handy.

It is advisable to place a foam on the barometric sensor. This will deflect ambient wind that can invalidate the altitude measurement. 

The external barometer can be connected using the I2C bus (SCL/SDA). The module is powered by 3.3V.