embedded-dht-rs

Getting Started

Tutorials

Install

cargo add embedded-dht-rs --features"dht11"

cargo add embedded-dht-rs --features"dht11,dht20,dht22"

Example - ESP32

#![no_std]#![no_main]use embedded_dht_rs::{dht11::Dht11, dht20::Dht20, dht22::Dht22};use esp_backtraceas _;use esp_hal::{    clock::ClockControl, delay::Delay, gpio::{Io,Level,OutputOpenDrain,Pull}, i2c::I2C, peripherals::Peripherals, prelude::*, system::SystemControl};use fugit::HertzU32;#[entry]fnmain() -> !{let peripherals =Peripherals::take();let system =SystemControl::new(peripherals.SYSTEM);let clocks =ClockControl::boot_defaults(system.clock_control).freeze();let io =Io::new(peripherals.GPIO, peripherals.IO_MUX);    esp_println::logger::init_logger_from_env();let delay =Delay::new(&clocks);let od_for_dht11 =OutputOpenDrain::new(io.pins.gpio4,Level::High,Pull::None);let od_for_dht22 =OutputOpenDrain::new(io.pins.gpio5,Level::High,Pull::None);let i2c_for_dht20 =I2C::new(        peripherals.I2C0,         io.pins.gpio21,        io.pins.gpio22,HertzU32::kHz(400),&clocks);letmut dht11 =Dht11::new(od_for_dht11, delay);letmut dht22 =Dht22::new(od_for_dht22, delay);letmut dht20 =Dht20::new(i2c_for_dht20, delay);loop{        delay.delay(5000.millis());match dht11.read(){Ok(sensor_reading) => log::info!("DHT 11 Sensor - Temperature: {} °C, humidity: {} %",                sensor_reading.temperature,                sensor_reading.humidity),Err(error) => log::error!("An error occurred while trying to read sensor: {:?}", error),}match dht22.read(){Ok(sensor_reading) => log::info!("DHT 22 Sensor - Temperature: {} °C, humidity: {} %",                sensor_reading.temperature,                sensor_reading.humidity),Err(error) => log::error!("An error occurred while trying to read sensor: {:?}", error),}match dht20.read(){Ok(sensor_reading) => log::info!("DHT 20 Sensor - Temperature: {} °C, humidity: {} %",                sensor_reading.temperature,                sensor_reading.humidity),Err(error) => log::error!("An error occurred while trying to read sensor: {:?}", error),}        log::info!("-----");}}

Implementation Specification

Comparison of DHT11, DHT20, and DHT22 40-Bit Data Formats

Example Schematic