• Typical pressure accuracy of ±0.05kPa

• Typical altitude accuracy of ±0.3m

• Typical temperature accuracy of ±3C

• 3.3V sensor - use inline logic level converters or 330 ohm resistors to

limit 5V signals

• Here’s the datasheet

• Here’s the schematic for the breakout board

This sensor is ideal for environmental sensing, a weather station, or

datalogging. It is a worthy replacement for the BMP085 and is more

sensitive than the MPL115A1.

Suggested Reading

• Read about I C!

• Using 3.3V sensors with 5V systems

• Installing an Arduino library

• What are pull-up resistors?

• Local Pressure vs Weather Station Pressure

Hooking It Up

Wiring up the MPL3115A2 pressure sensor is very easy!

Basic hook up with 330 ohm in-line resistors

There are only four pins that need to be hooked up in order to start using

this sensor in a project. One for VCC, one for GND, and two data lines for

I C communication.

Note: This breakout board has built in 1k pull up resistors for I C

communications. If you’re hooking up multiple I C devices on the same bus,

you may need to disable the other resistors on the bus.

Connections: Breakout board to Arduino

•VCC → 3.3V

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