MPL3115A2 - I2C Barometric Pressure/Altitude/Temperature Sensor

The MPL3115A2 pressure sensor from Freescale is an affordable, precise solution for measuring barometric pressure and altitude. With a typical resolution of 1.5 Pascals, it can measure altitude with an accuracy of 0.3 meters (compared to the BMP180, which is 0.17 meters). This sensor offers some distinct advantages over the BMP280, such as interrupt outputs for ultra-low power usage and an integrated altimeter calculation for easy altitude reading (no calibration or complex calculations required). Additionally, it includes a temperature sensor with a typical accuracy of ±1°C (±3°C max).

• Precision Measurement: 1.5 Pascal resolution for precise barometric pressure and altitude measurements.
• Built-in Altimeter: No need for complex calibration or calculations to measure altitude.
• Temperature Sensor: Includes a built-in temperature sensor with ±1°C typical accuracy.
• Power and Logic Voltage: Operates with 2-3.6V power and logic, making it ideal for microcontroller integration.
• Easy Integration: Breakout board includes a 3V regulator and logic level shifting for compatibility with 5V microcontrollers like Arduino.
• I2C Interface: Simple to use with Arduino and other microcontrollers that support I2C.

How to Use:

• Wiring for Arduino:
  • VDD to 5V
  • GND to ground
  • SCL to I2C Clock (Analog pin 5 on Arduino UNO)
  • SDA to I2C Data (Analog pin 4 on Arduino UNO)
• Library and Code: Download the MPL3115A2 Arduino library, load the example sketch, and start reading temperature, pressure, and altitude data right in the serial console.

This sensor is perfect for projects requiring accurate altitude measurements or barometric pressure data in a compact, easy-to-use package.