Awesome
SHT31-rs
A cargo library for the SHT31 temperature / humidity sensors
Usage
The default sensor usage includes a blocking sensor read that blocks the current thread until the sensor does a reading.
use sht31::prelude::*;
fn main() -> Result<()> {
// Requires an i2c connection + delay (both from embedded_hal 1.x.x)
let sht = SHT31::new(i2c, delay);
loop {
let reading = sht.read()?;
}
}
Advanced Single Shot Usage
Breaks down the simple usage into two commands, one where the sensor is notified to start reading and another where the reading is requested
use sht31::prelude::*;
fn main() -> Result<()> {
// i2c setup
// Use single shot, with high accuracy, an alternate I2C address
// and return temp data in Fahrenheit
let sht = SHT31::new(i2c)
.with_mode(SingleShot::new())
.with_accuracy(Accuracy::High)
.with_unit(TemperatureUnit::Fahrenheit)
.with_address(DeviceAddr::AD1);
loop {
// Start measuring before you need the reading,
// this is more efficient than waiting for readings
sht.measure()?;
// Some other code here...
let reading = sht.read()?;
}
}
Periodic Usage
Periodic mode continually reads data at a rate of the
given measurements per second (MPS) and at a quality
of the given Accuracy. This means that you dont have to
worry about running SHT31::measure()
every time you want
to read data
use sht31::prelude::*;
fn main() -> Result<()> {
// i2c setup
// In periodic mode, the sensor keeps updating the reading
// without needing to measure
let mut sht = SHT31::new(sht_i2c)
.with_mode(Periodic::new().with_mps(MPS::Normal))
.with_accuracy(Accuracy::High);
// Trigger the measure before running your loop to initialize the periodic mode
sht.measure()?;
loop {
let reading = sht.read()?;
}
}
Periodic with Accelerated Response Time
Periodic mode has a unique mode that allows the sensor to read data at 4Hz
use sht31::prelude::*;
fn main() -> Result<()> {
// Makes the sensor acquire the data at 4 Hz
let mut sht = SHT31::new(sht_i2c)
.with_mode(Periodic::new().with_art());
sht.measure()?;
loop {
let reading = sht.read()?;
}
}
Mode switching
This crate also supports more complex case scenarios where you might want to switch between period to single shot for example
use sht31::prelude::*;
fn main() -> Result<()> {
// i2c setup
let mut sht = SHT31::new(sht_i2c)
.with_mode(Periodic::new());
// Trigger the measure before running your loop to initialize the periodic mode
sht.measure()?;
// Do a periodic read
let reading = sht.read()?;
// Cancel the currently running command (periodic)
sht.break_command()?;
sht = sht.with_mode(SingleShot::new());
sht.measure()?;
let new_reading = sht.read()?;
}