feat: add features

Cargo.toml

@@ -16,6 +16,12 @@ embedded-hal = "1.0.0"
 [dev-dependencies]
 embedded-hal-mock = "0.11.1"
 
+[features]
+dht11 = []
+dht20 = []
+dht22 = []
+default = [] 
+
 [lib]
 doctest = false  
 

README.md

@@ -24,12 +24,24 @@ Here are some general tutorials that provide brief introductions to embedded pro
 - **Part 3 (DHT11 Library)** - [Building a Rust library for DHT11 sensor](https://rust-dd.com/post/building-a-rust-library-for-dht11-sensor-a-step-by-step-guide)
 
 
-### Example - ESP32
+### Install
+
+
+To include the `dht11` feature:
 
 ```rust
 cargo add embedded-dht-rs
 ```
 
+To include all features (`dht11`, `dht20`, and `dht22`):
+
+```rust
+cargo add embedded-dht-rs --features "dht11,dht20,dht22"
+```
+
+### Example - ESP32
+
+
 ```rust
 #![no_std]
 #![no_main]

src/lib.rs

@@ -1,8 +1,14 @@
 #![no_std]
 
 mod dht;
+
+#[cfg(feature = "dht11")]
 pub mod dht11;
+
+#[cfg(feature = "dht20")]
 pub mod dht20;
+
+#[cfg(feature = "dht22")]
 pub mod dht22;
 
 /// Represents a reading from the sensor.