Hi,
found some code and try to combine this Codes to one.
Here you can see an play with the Code: https://wokwi.com/projects/384345803812527105
But had no success to display the: temprature & humidity on the display !
Could someone be so kind an help me with this ?
ESP32 + SSD1306 + DHT22 - how output temp & humidity on Display ???
Re: ESP32 + SSD1306 + DHT22 - how output temp & humidity on Display ???
I think this tutorial is much easier: https://randomnerdtutorials.com/esp32-e ... d-display/
I also recommend cross-checking the DHT22 with an Arduino separately. You can follow this code here for the testing purposes:
https://www.theengineeringprojects.com/ ... dht22.html
I also recommend cross-checking the DHT22 with an Arduino separately. You can follow this code here for the testing purposes:
https://www.theengineeringprojects.com/ ... dht22.html
Re: ESP32 + SSD1306 + DHT22 - how output temp & humidity on Display ???
@liaifat85
thank you but I need a Rust solution not Arduino
thank you but I need a Rust solution not Arduino
Re: ESP32 + SSD1306 + DHT22 - how output temp & humidity on Display ???
Code: Select all
cargo generate --git https://github.com/esp-rs/esp-idf-template cargo
cd esp32-ssd1306-dht22
cargo add esp-idf-svc
cargo add ssd1306
cargo add esp-idf-hal
cargo add embedded-svc
cargo add embedded-graphics
cargo add anyhow
cargo add esp-idf-sys
cargo add epd-waveshare
cargo add dht_sensor
. ~/export-esp.sh
cargo check
cargo run
Code: Select all
//SSD1306:
//SDA -> GPIO21
//SCL -> GPIO22
//DHT22:
//DATA -> GPIO18
use esp_idf_hal::i2c::*;
use esp_idf_hal::prelude::*;
use esp_idf_hal::delay::FreeRtos;
use esp_idf_svc::hal::{delay, gpio::PinDriver, peripherals::Peripherals};
use ssd1306::{prelude::*, I2CDisplayInterface, Ssd1306};
use std::thread;
use std::time::Duration;
use dht_sensor::{dht22, DhtReading};
use embedded_graphics::{
mono_font::{ascii::FONT_6X10, MonoTextStyleBuilder},
pixelcolor::BinaryColor,
prelude::*,
text::{Baseline, Text},
primitives::{Circle, PrimitiveStyleBuilder}
};
fn main() -> anyhow::Result<()> {
esp_idf_svc::sys::link_patches();
let peripherals = Peripherals::take().unwrap();
let i2c = peripherals.i2c0;
let sda = peripherals.pins.gpio21;
let scl = peripherals.pins.gpio22;
let mut pin = PinDriver::input_output_od(peripherals.pins.gpio18).unwrap();
pin.set_high().unwrap();
// The DHT datasheet suggests waiting 1 second
thread::sleep(Duration::from_millis(1000));
let mut d = delay::Ets;
let mut iterations = 1500;
let config = I2cConfig::new().baudrate(100.kHz().into());
let i2c = I2cDriver::new(i2c, sda, scl, &config)?;
let interface = I2CDisplayInterface::new(i2c);
let mut display = Ssd1306::new(interface, DisplaySize128x64, DisplayRotation::Rotate0)
.into_buffered_graphics_mode();
display.init().unwrap();
let text_style = MonoTextStyleBuilder::new()
.font(&FONT_6X10)
.text_color(BinaryColor::On)
.build();
let off = PrimitiveStyleBuilder::new()
.stroke_width(1)
.stroke_color(BinaryColor::Off)
.build();
let on = PrimitiveStyleBuilder::new()
.stroke_width(1)
.stroke_color(BinaryColor::On)
.build();
let mut i = 0;
let mut dir = 1;
Text::with_baseline("Hello world!", Point::new(30, 0), text_style, Baseline::Top)
.draw(&mut display)
.unwrap();
// Text::with_baseline("with Rust!!", Point::new(30, 16), text_style, Baseline::Top)
// .draw(&mut display)
// .unwrap();
loop {
while iterations > 0 {
thread::sleep(Duration::from_secs(3));
iterations -= 1;
let temp_str = format!(" ");
let hum_str = format!(" ");
Text::with_baseline(&temp_str, Point::new(30, 16), text_style, Baseline::Top)
.draw(&mut display)
.unwrap();
display.init().unwrap();
display.flush().unwrap();
Text::with_baseline(&hum_str, Point::new(30, 28), text_style, Baseline::Top)
.draw(&mut display)
.unwrap();
if let Ok(r) = dht22::Reading::read(&mut d, &mut pin) {
println!("Temperature: {}\tHumidity: {}",
r.temperature, r.relative_humidity
);
let temp_str = format!("temp: {}", r.temperature);
Text::with_baseline(&temp_str, Point::new(30, 16), text_style, Baseline::Top)
.draw(&mut display)
.unwrap();
let hum_str = format!("hum: {}", r.relative_humidity);
Text::with_baseline(&hum_str, Point::new(30, 28), text_style, Baseline::Top)
.draw(&mut display)
.unwrap();
}
Circle::new(Point::new(i, 40), 8)
.into_styled(off)
.draw(&mut display)
.unwrap();
if i > 100 {
dir = -1;
}
if i == 0 {
dir = 1;
}
i += dir << 4;
Circle::new(Point::new(i, 40), 8)
.into_styled(on)
.draw(&mut display)
.unwrap();
display.flush().unwrap();
FreeRtos::delay_ms(100);
}
}
}
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