cli: read hid reports

cli/Cargo.toml

@@ -4,4 +4,8 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+async-hid = "0.5.1"
+deku = "0.20.3"
+futures-lite = "2.6.1"
+pollster = { version = "0.4.0", features = ["macro"] }
 shared = { path = "../shared" }

cli/src/main.rs

@@ -1,3 +1,27 @@
-fn main() {
-    println!("Hello, world!");
+use async_hid::{AsyncHidRead, HidBackend, HidResult};
+use deku::DekuContainerRead;
+use futures_lite::StreamExt;
+use shared::hid::AudioTelemetryReport;
+
+#[pollster::main]
+async fn main() -> HidResult<()> {
+    let usbhid = HidBackend::default();
+    let dev = usbhid
+        .enumerate()
+        .await?
+        .find(|d| d.product_id == 0xcc1d && d.vendor_id == 0x1209)
+        .await
+        .expect("GUAC device not found or not accessible (try as root?)");
+    let mut reader = dev.open_readable().await?;
+
+    let mut buf = [0u8; core::mem::size_of::<AudioTelemetryReport>()];
+    while let Ok(r) = reader.read_input_report(&mut buf).await {
+        let buf = &buf[..r];
+        match AudioTelemetryReport::from_bytes((buf, 0)) {
+            Ok((_, r)) => println!("{:?}", r),
+            Err(e) => eprintln!("Unable to parse report: {:?}", e),
+        }
+    }
+
+    Ok(())
 }