Crate sgp40[−][src]

Platform agnostic Rust driver for Sensirion SGP40 device with gas, temperature and humidity sensors based on the embedded-hal traits.

Sensirion SGP40

Sensirion SGP40 is a low-power accurate gas sensor for air quality application. The sensor has different sampling rates to optimize power-consumption per application bases as well as ability save and set the baseline for faster start-up accuracy. The sensor uses I²C interface and measures TVOC (Total Volatile Organic Compounds)

Datasheet: https://www.sensirion.com/file/datasheet_sgp40

Usage

Instantiating

Import this crate and an embedded_hal implementation, then instantiate the device:

use linux_embedded_hal as hal;

use hal::{Delay, I2cdev};
use sgp40::Sgp40;

fn main() {
    let dev = I2cdev::new("/dev/i2c-1").unwrap();
    let mut sgp = Sgp40::new(dev, 0x59, Delay);
}

Doing Measurements

The device is doing measurements independently of the driver and calls to the device will just fetch the latest information making the usage easy.

use linux_embedded_hal as hal;
use hal::{Delay, I2cdev};

use std::time::Duration;
use std::thread;

use sgp40::Sgp40;

fn main() {
    let dev = I2cdev::new("/dev/i2c-1").unwrap();

    let mut sensor = Sgp40::new(dev, 0x59, Delay);

    // Discard the first 45 samples as the algorithm is just warming up.
    for _ in 1..45 {
        sensor.measure_voc_index().unwrap();
    }

    loop {
        if let Ok(result) = sensor.measure_voc_index() {
            println!("VOC index: {}", result);
        }
        else {
            println!("Failed I2C reading");
        }

        thread::sleep(Duration::new(1_u64, 0));
    }
}

Crate sgp40[−][src]

Sensirion SGP40

Usage

Instantiating

Doing Measurements

VOC Index calculation

Structs

Enums