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Visit our eBay store for more electronic products.The MPL115A2 from Freescale is a compact, low-cost digital barometric pressure sensor designed for measuring atmospheric pressure in a wide range of electronics and embedded applications. It communicates through the I²C interface, making it easy to connect to Arduino, ESP32, Raspberry Pi and other compatible microcontrollers.
The MPL115A2 is particularly well suited to basic barometric pressure measurement, weather monitoring and approximate altitude calculations. It offers a pressure resolution of approximately 1.5 hPa, making it a practical and economical solution where high-precision altitude measurement is not required.
The sensor also includes a basic internal temperature sensor. However, temperature accuracy is not specified in the sensor documentation, so the temperature measurement is best considered suitable for general-purpose applications rather than precision temperature sensing.
Freescale MPL115A2 digital barometric pressure sensor
Measures atmospheric pressure and temperature
Simple I²C digital interface
Fixed I²C 7-bit address: 0x60
Wide operating/input voltage range of 2.4 to 5.5 VDC
3V and 5V logic compatible
Pressure sensing range: 500 to 1150 hPa
Approximately 1.5 hPa / 50 m altitude resolution
Suitable for pressure measurements corresponding to altitudes up to approximately 10 km
Built-in factory calibration coefficients for pressure compensation
10K pull-up resistors already fitted to the I²C lines
Compact and lightweight PCB
PCB weight: only 0.61 g
Suitable for Arduino, ESP32, Raspberry Pi and other I²C-compatible controllers
| Parameter | Specification |
|---|---|
| Sensor | Freescale MPL115A2 |
| Sensor Type | Barometric Pressure & Temperature |
| Interface | I²C |
| I²C Address | 0x60 (7-bit) |
| Input Voltage (Vin) | 2.4 to 5.5 VDC |
| Logic Level | 3 to 5V compliant |
| Pressure Range | 500–1150 hPa |
| Resolution | Approximately 1.5 hPa |
| Altitude Resolution | Approximately 50 m |
| Approx. Altitude Range | Up to 10 km |
| I²C Pull-Ups | 10K resistors fitted on PCB |
| PCB Weight | 0.61 g |
The module is simple to connect to common microcontrollers. For example, with an Arduino Uno:
VDD → 5V
GND → GND
SCL → I²C Clock (A5)
SDA → I²C Data (A4)
Because the module supports 2.4–5.5V supply and 3–5V logic, it can be conveniently used with both 3.3V and 5V microcontroller systems.
The MPL115A2 is ideal for:
DIY weather stations
Barometric pressure monitoring
Atmospheric pressure measurement
Basic altitude estimation
Arduino projects
ESP32 projects
Raspberry Pi projects
IoT environmental sensors
Portable electronics
Robotics and drones
Data logging
Educational and science projects
The MPL115A2 provides approximately 1.5 hPa resolution, making it excellent for economical, general-purpose barometric pressure sensing. However, it is not intended as a precision altimeter. Changes in atmospheric weather conditions can also affect pressure-based altitude calculations, so accurate altitude measurement requires appropriate calibration and compensation.
If your project requires significantly higher pressure resolution and precision, a newer high-resolution pressure sensor would be more appropriate. For basic barometric pressure sensing and approximate altitude calculations, however, the MPL115A2 provides a simple and cost-effective solution.
The sensor is straightforward to use with Arduino and other platforms supporting I²C. Once connected to the I²C bus, software can read the pressure and temperature data and perform basic altitude calculations using the sensor's calibration information.
Please note: The module includes the MPL115A2 sensor, which is a lower-resolution device than the similarly named MPL3115A2. These are different sensors and should not be confused with each other.
1 × MPL115A2 I²C Barometric Pressure & Temperature Sensor Module
A compact, low-power and easy-to-use solution for barometric pressure measurement, weather monitoring and basic altitude sensing in Arduino, ESP32, Raspberry Pi and other DIY electronics projects.