> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# MPL115A2 - I2C Barometric Pressure/Temperature Sensor

**Type:** Product page · **SKU:** ADA992 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/mpl115a2-i2c-barometric-pressure-temperature-sensor.html ([markdown](https://core-electronics.com.au/mpl115a2-i2c-barometric-pressure-temperature-sensor.html.md))

## Retired product

This product is retired and no longer available for purchase. Search the catalogue for an alternative.

## How to buy

- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

This pressure sensor from Freescale is a great low-cost sensing solution for measuring barometric pressure. At 1.5 hPa resolution, it's not as precise as Adafruit's favorite pressure sensor, the BMP085, which has up to 0.03 hPa resolution so they don't suggest it as a precision altimeter. However, it's great for basic barometric pressure sensing. The sensor is soldered onto a PCB with 10K pull-up resistors on the I2C pins.

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 they are not sure how accurate it is.

**This chip looks and sounds a whole lot like the [MPL3115A2](https://core-electronics.com.au/mpl3115a2-i2c-barometric-pressure-altitude-temperature-sensor.html) 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 Adafruit's [MPL115A2 Arduino library and example code for temperature, pressure and basic altitude calculation.](https://github.com/adafruit/Adafruit_MPL115A2) Install the library, and load the example sketch. Immediately you'll have the temperature, pressure and altitude data printed in the serial console.

## Technical Details

- PCB weight: 0.61g
- Vin: 2.4 to 5.5 VDC
- Logic: 3 to 5V compliant
- Pressure sensing range: 500-1150 hPa (up to 10Km altitude)
- 1.5 hPa / 50 m altitude resolution
- This board/chip uses I2C 7-bit address 0x60

[MPL115A2 Datasheet](https://cdn-shop.adafruit.com/datasheets/MPL115A2.pdf)

[Fritzing object in Adafruit Fritzing library](https://github.com/adafruit/Fritzing-Library)

[EagleCAD PCB files on GitHub](https://github.com/adafruit/Adafruit-MPL115A2-Breakout-PCB)

Using the sensor is easy. For example, if you're using an Arduino, simply connect the VIN 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 Adafruit's [MPL115A2 Arduino library and example code for temperature, pressure and basic altitude calculation.](https://github.com/adafruit/Adafruit_MPL115A2) Install the library, and load the example sketch. Immediately you'll have the temperature, pressure and altitude data printed in the serial console.

 ![](https://core-electronics.com.au/media/wysiwyg/resources/rohs_icon.jpg)

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/9/9/992-00.jpg)