**Details** This Tibbit is based on the MPL115A2 barometric pressure measurement IC with I2C interface. The sensor is implemented as the [C1 device](http://docs.tibbo.com/phm/tibbit_c1.htm) with perforated front face. The module measures the atmospheric pressure with 0.15 kPa resolution and +/-1 kPa accuracy. This C1 device requires the Tibbit #00-3 to be installed in the neighboring ["M" Tibbit socket](http://docs.tibbo.com/phm/the_standard_tibbit_tile.htm). #00-3 provides two direct lines for I2C comms, as well as the ground and +5V power for the MPL115A2 IC. **Sample project** The use of this Tibbit is illustrated by a Tibbo BASIC test project. Yo can find it here: [https://github.com/tibbotech/CA-Test-Tibbit-35](https://github.com/tibbotech/CA-Test-Tibbit-35).