Skip to content
/ sht4x Public
forked from sirhcel/sht4x

Sensirion SHT4x Driver for Embedded HAL

Notifications You must be signed in to change notification settings

madmo/sht4x

 
 

Folders and files

NameName
Last commit message
Last commit date

Latest commit

 

History

39 Commits
 
 
 
 
 
 
 
 
 
 
 
 

Repository files navigation

Sensirion SHT4x Driver for Embedded HAL

A platform agnostic device driver for the Sensirion SHT4x temperature and humidity sensor family. It is based on embedded-hal traits and works in no_std environments.

In theory, it supports all of the sensor family's devices but has only been tested with the SHT40-AD1B so far.

Build Status crates.io Documentation

Features

  • Blocking operation
  • Supports all commands specified in the datasheet
  • Explicitly borrows DelayMs for command execution so that it could be shared (among multiple sensors)
  • Could be instantiated with the alternative I2C address for the SHT40-BD1B
  • Uses fixed-point arithmetics for converting raw sensor data into measurements in SI units
    • Based on I16F16 from the fixed crate
    • Allows conversion to floating-point values, if needed
    • Convenience methods for fixed-point conversions to milli degree Celsius or milli percent relative humidity which are commonly used by drivers for other humidity and temperature sensors from Sensirion
  • Optional support for defmt

Example

use embedded_hal::blocking::delay::DelayMs;
use sht4x::Sht4x;
// Device-specific use declarations.

let mut delay = // Device-specific initialization of delay.
let i2c = // Device-specific initialization of I2C peripheral.
let mut sht40 = Sht4x::new(i2c);

let serial = sht40.serial_number(&mut delay);
defmt::info!("serial number: {}", serial);

let measurement = sht40.measure(Precision::Low, &mut delay);
defmt::info!("measurement: {}", &measurement);

if let Ok(measurement) = measurement {
    // Convert temperature measurand into different formats for further
    // processing.
    let int: i32 = measurement.temperature_milli_celsius();
    let fixed: I16F16 = measurement.temperature_celsius();
    let float: f32 = measurement.temperature_celsius().to_num();
}

Related Work

sensor-temp-humidity-sht40 is another driver for this sensor family.

License

Licensed under either of

at your discretion.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

About

Sensirion SHT4x Driver for Embedded HAL

Resources

Stars

Watchers

Forks

Releases

No releases published

Packages

No packages published

Languages

  • Rust 100.0%