MPL115A2 – I2C Barometric Pressure/Temperature Sensor

This chip is good for use with power and logic voltages ranging from 2.4V to 5.5V so you can use it with your 3V or 5V microcontroller. There’s a basic temperature sensor inside but there’s no specifications in the datasheet so we’re not sure how accurate it is.

This chip looks and sounds a whole lot like the MPL3115A2 but this is the less precise version, best for barometric sensing only

Using the sensor is easy. For example, if you’re using an Arduino, simply connect the VDD pin to the 5V voltage pin, GND to ground, SCL to I2C Clock (Analog 5 on an UNO) and SDA to I2C Data (Analog 4 on an UNO). Then download our MPL115A2 Arduino library and example code for temperature, pressure and basic altitude calculation. Install the library, and load the example sketch. Immediately you’ll have the temperature, pressure and altitude data printed in the serial console.