scd41-embedded

A platform-agnostic, no_std driver for the Sensirion SCD41 CO₂ / temperature / humidity sensor, built on the embedded-hal traits.

This crate provides:

• Blocking (synchronous) API using embedded-hal 1.0 (I2c + DelayNs)
• Optional async I2C + delay API behind the async feature using embedded-hal-async

Features

• async: enables async I2C + delay support via embedded-hal-async.

Blocking example

use scd41_embedded::Scd41;

# let i2c = todo!("provide an embedded-hal I2C implementation");
# let delay = todo!("provide an embedded-hal DelayNs implementation");

let mut scd = Scd41::new(i2c, delay);

scd.start_periodic_measurement()?;

loop {
    if scd.data_ready()? {
        let m = scd.measurement()?;
        // m.co2_ppm, m.temperature_c, m.relative_humidity_percent
        break;
    }
}
# Ok::<(), scd41_embedded::Error<_>>(())

Async example

Enable the feature:

[dependencies]
scd41-embedded = { version = "0.1", features = ["async"] }

use scd41_embedded::r#async::Scd41Async;

# let i2c = todo!("provide an embedded-hal-async I2C implementation");
# let delay = todo!("provide an embedded-hal-async DelayNs implementation");

let mut scd = Scd41Async::new(i2c, delay);

scd.start_periodic_measurement().await?;

loop {
    if scd.data_ready().await? {
        let m = scd.measurement().await?;
        break;
    }
}
# Ok::<(), scd41_embedded::Error<_>>(())

License

MIT