So for the past week, I have been frantically looking around the internet trying to find out how I can use a BMP280 pressure sensor to calculate altitude above ground level.
I understand that I need to know the pressure at ground level, and some math roughly along the lines of:
"if pressure is = X, then altitude is =Y"
I have heard that it is possible for the sensor to read pressure as 0 when turned on, and then every meter in altitude, the pressure increases by 0.121738 millibars. How would I go about getting the sensor to read 0 when turned on?
Let me know if you need more clarification!