differential_pressure

Differential pressure sensor MS4525DO

The MS4525DO is a small, ceramic based, PCB mounted pressure transducer from TE Connectivity.The transducer creates a low cost, high performance digital output pressure (14bit) and temperature (11bit).

According to MS4525DO datasheet, the sensor has the following range of measured data:

• differential pressure is from -1 psi to +1 psi or from -6894.757 pa to +6894.757 pa.
• temperature is from -50 to +150 Celcius or from 223 to 423 Kelvin.

If we consider temperature ~288 Kelvin and pressure 101325 Pa according to the ISA model differential pressure interval above should be enough for up to 100 m/sec airspeed that is suitable for a wide area of small VTOL application.

Reference	Datasheet
Requred periphery	I2C
Unit tests	test_ms4525do.cpp

Usage

Installation:

1. Include the header file ms4525do.h and source file ms4525do.c in your C/C++ code.
2. Ensure that the required dependencies are installed, such as the STM32 HAL library or any other libraries specific to your STM32 development environment.

Usage:

1. During the boot of your application initialize I2C driver and then call ms4525doInit()
2. Periodically (with rate 10 Hz) call ms4525doCollectData(). If it returns LIBPERIPH_OK, then call ms4525doParseCollectedData().

Additional info

• Sensor connection with Ardupilot based autopilots: https://ardupilot.org/plane/docs/airspeed.html
• Sensor connection with PX4 based autopilots: https://docs.px4.io/main/en/sensor/airspeed.html