don't pass along already-ignored pin level to button handler

src/main.rs

@@ -6,7 +6,7 @@ use std::time::Duration;
 
 use futures_util::{FutureExt, select, stream, StreamExt};
 #[allow(unused_imports)] use log::{debug, error, info, trace};
-use rppal::gpio::{Gpio, Level, Trigger};
+use rppal::gpio::{Gpio, Trigger};
 use smallvec::SmallVec;
 use tokio::{ sync::mpsc,
              time::{delay_for, interval} };
@@ -33,7 +33,7 @@ async fn main() {
   let gpio = Gpio::new().expect("gpio init");
   let mut pin = gpio.get(BUTTON_PIN).expect("pin init").into_input_pullup();
 
-  pin.set_async_interrupt(Trigger::FallingEdge, move |level| button_pressed(level, &clients))
+  pin.set_async_interrupt(Trigger::FallingEdge, move |_| button_pressed(&clients))
      .expect("set interrupt");
 
   let reqwest = &reqwest::Client::new();
@@ -57,8 +57,7 @@ async fn main() {
   }
 }
 
-fn button_pressed(_level: Level,
-                  clients: &Arc<Mutex<SmallVec<[mpsc::Sender<()>; CHANNEL_VEC_SIZE]>>>) {
+fn button_pressed(clients: &Arc<Mutex<SmallVec<[mpsc::Sender<()>; CHANNEL_VEC_SIZE]>>>) {
   info!("DOORBELL PRESS");
   clients.lock().unwrap().retain(|tx: &mut mpsc::Sender<()>| {
     match tx.try_send(()) {