Physical Computing with Rust

With a switch, a single press and release on the button would turn the LED on, and another press and release would turn it off again.

• Modify the examples/button.rs file so that it looks like this:

  extern crate rust_gpiozero;
  use rust_gpiozero::*;
  use std::thread::sleep;
  use std::time::Duration;
  
  
  fn main() {
  
  // Tell the Pi which GPIO pin you are using
  let mut led = LED::new(17);
  
  // Create a button which is attached to Pin 22
  let button = Button::new(22);
  
  loop{
      button.wait_for_press();
      led.toggle();
      sleep(Duration::from_secs(1));
  
      }
  }
  

• led.toggle(); switches the state of the LED from on to off, or off to on. Since this happens in a loop the LED will turn on and off each time the button is pressed.