diff --git a/.cargo/config.toml b/.cargo/config.toml
new file mode 100644
index 0000000..ff8b44d
--- /dev/null
+++ b/.cargo/config.toml
@@ -0,0 +1,11 @@
+[target.'cfg(all(target_arch = "arm", target_os = "none"))']
+rustflags = [
+  "-C", "link-arg=-Tlink.x",
+  "-C", "link-arg=-Tdefmt.x",
+]
+
+[build]
+target = "thumbv7em-none-eabihf"
+
+[env]
+DEFMT_LOG = "debug"
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..bb17919
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "rust-analyzer.check.allTargets": false
+}
diff --git a/hardware_main/src/main.rs b/hardware_main/src/main.rs
index 66882d5..8da839d 100644
--- a/hardware_main/src/main.rs
+++ b/hardware_main/src/main.rs
@@ -58,7 +58,7 @@ async fn temp_task(mut temp: Temp<'static>) {
         let value: u16 = temp.read().await.to_num();
         info!("{} C", value);
         let delay = Duration::from_millis(delay_ms);
-        if let Some(v) = SIGNAL.wait().with_timeout(delay).await.ok() {
+        if let Ok(v) = SIGNAL.wait().with_timeout(delay).await {
             delay_ms = match v {
                 Button::A => max(INTERVAL_MS, delay_ms.saturating_sub(INTERVAL_MS)),
                 Button::B => delay_ms + INTERVAL_MS,