docs: update

Author: zeldan

README.md

@@ -24,20 +24,19 @@ Here are some general tutorials that provide brief introductions to embedded pro
 
 ### Example - ESP32
 
+![running](/docs/example_esp32_wired.jpg)
+
 ```rust
 #![no_std]
 #![no_main]
 
-use embedded_dht_rs::{dht11::Dht11, dht22::Dht22};
+use embedded_dht_rs::{dht11::Dht11, dht20::Dht20, dht22::Dht22};
 use esp_backtrace as _;
 use esp_hal::{
-    clock::ClockControl,
-    delay::Delay,
-    gpio::{Io, Level, OutputOpenDrain, Pull},
-    peripherals::Peripherals,
-    prelude::*,
-    system::SystemControl,
+    clock::ClockControl, delay::Delay, gpio::{Io, Level, OutputOpenDrain, Pull}, i2c::I2C, peripherals::Peripherals, prelude::*, system::SystemControl
 };
+use fugit::HertzU32;
+
 #[entry]
 fn main() -> ! {
     let peripherals = Peripherals::take();
@@ -49,11 +48,20 @@ fn main() -> ! {
 
     let delay = Delay::new(&clocks);
 
-    let gpio4 = OutputOpenDrain::new(io.pins.gpio4, Level::High, Pull::None);
-    let gpio5 = OutputOpenDrain::new(io.pins.gpio5, Level::High, Pull::None);
-
-    let mut dht11 = Dht11::new(gpio4, delay);
-    let mut dht22 = Dht22::new(gpio5, delay);
+    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, 
+        None,
+    );
+
+    let mut dht11 = Dht11::new(od_for_dht11, delay);
+    let mut dht22 = Dht22::new(od_for_dht22, delay);
+    let mut dht20 = Dht20::new(i2c_for_dht20, delay);
 
     loop {
         delay.delay(5000.millis());
@@ -76,6 +84,15 @@ fn main() -> ! {
             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!("-----");
     }
 }