A 100 psig sensor seems ill suited for altitude measurement. With the pressure referenced to ground pressure, the ultimate max pressure that you will see is -14.7 psi. Here is a tutorial on I2C http://www.gammon.com.au/forum/?id=10896.
A 100 psig sensor seems ill suited for altitude measurement. With the pressure referenced to ground pressure, the ultimate max pressure that you will see is -14.7 psi. Here is a tutorial on I2C http://www.gammon.com.au/forum/?id=10896.