Crate ms4525do 

MS4525DO Airspeed Sensor Driver

A platform-agnostic Rust driver for the MS4525DO differential pressure sensor, commonly used for airspeed measurement in drones and aircraft.

Features

• Dual API: Both blocking and async implementations
• Platform agnostic: Works on any platform with I2C support
• no_std compatible: Suitable for embedded systems
• Zero dynamic allocation: All operations use stack memory
• Validated readings: Double-read validation ensures data freshness
• Flexible logging: Optional defmt or log support

Usage

Blocking API

use ms4525do::blocking::Ms4525do;
use embedded_hal::delay::DelayNs;

let mut sensor = Ms4525do::new(i2c);
let mut delay = /* your delay implementation */;

match sensor.read_data(&mut delay) {
    Ok((pressure_pa, temp_c)) => {
        let airspeed = ms4525do::calculate_airspeed(pressure_pa, temp_c);
        println!("Airspeed: {:.2} m/s", airspeed);
    }
    Err(e) => println!("Error: {:?}", e),
}

Async API

use ms4525do::async_api::Ms4525do;
use embassy_time::{Duration, Timer};

let mut sensor = Ms4525do::new(i2c);

match sensor.read_data().await {
    Ok((pressure_pa, temp_c)) => {
        let airspeed = ms4525do::calculate_airspeed(pressure_pa, temp_c);
        println!("Airspeed: {:.2} m/s", airspeed);
    }
    Err(e) => println!("Error: {:?}", e),
}

Feature Flags

• async (default): Enable async API with embassy-time
• blocking: Enable blocking/synchronous API
• std: Enable std support (for desktop/server environments)
• defmt: Enable defmt logging for embedded debugging
• log: Enable log facade for flexible logging

Sensor Details

The MS4525DO is a digital differential pressure sensor with:

• I2C interface (default address: 0x28)
• 14-bit pressure resolution
• 11-bit temperature resolution
• ±1 PSI measurement range (001PD variant)
• Operating temperature: -50°C to +150°C

Modules

async_api

Asynchronous (non-blocking) API for MS4525DO sensor communication.

blocking

Blocking (synchronous) API for MS4525DO sensor communication.

Enums

Ms4525doError

Errors that can occur during MS4525DO sensor operations.

Status

Status codes returned by the MS4525DO sensor.

Functions

calculate_airspeed

Calculates airspeed from differential pressure and temperature.