Modifications

Then open up the serial monitor at 9600 baud. The sketch will continuously print out the temperature in '''°C''' and pressure in '''Pa''' (Pascals). You can test that the sensor is measuring variations in temperature and pressure by placing your fingertip over the open port hole in the top of the sensor. The temperature and pressure will increase as you can see here:  

Then open up the serial monitor at 9600 baud. The sketch will continuously print out the temperature in '''°C''' and pressure in '''Pa''' (Pascals). You can test that the sensor is measuring variations in temperature and pressure by placing your fingertip over the open port hole in the top of the sensor. The temperature and pressure will increase as you can see here:  

[[Fichier:BMP085-Utiliser-00.jpg|640px]]

[[Fichier:BMP085-Utiliser-00.jpg]]

== Altitude Measurements ==

== Altitude Measurements ==

Since we know that pressure drops as we gain altitude (that's why air is so thin on mountain-tops) we can compute the current altitude knowing the pressure and temperature. Again, there's a bit of hairy math involved, [http://en.wikipedia.org/wiki/Barometric_pressure you can read about the calculations on wikipedia] (where this graph is from).  

Since we know that pressure drops as we gain altitude (that's why air is so thin on mountain-tops) we can compute the current altitude knowing the pressure and temperature. Again, there's a bit of hairy math involved, [http://en.wikipedia.org/wiki/Barometric_pressure you can read about the calculations on wikipedia] (where this graph is from).  

[[Fichier:BMP085-Utiliser-01.png|640px]]<br />

[[Fichier:BMP085-Utiliser-01.png]]<br />

<small>Source: [http://en.wikipedia.org/wiki/Barometric_pressure Wikipedia]</small>

<small>Source: [http://en.wikipedia.org/wiki/Barometric_pressure Wikipedia]</small>