Arduino altitude pressure sensor BMP180
You might wonder why anyone would need to measure atmospheric pressure. In fact, this is very useful for two reasons:
The first is that it allows you to measure altitude. As you travel from
sea level (or even below sea level) to high elevation, the air pressure
decreases. This means that measuring the pressure makes it possible to
determine our altitude... practical when you don't want to pay the price
of a GPS module.
Then, the atmospheric pressure helps to
predict the weather. This is precisely what "Mr Météo" uses when he
talks about pressure systems to make his forecasts.
