From 105d3123f4b63a61609a3bf42acf0f9d53bffd0f Mon Sep 17 00:00:00 2001
From: Jannik Beyerstedt <beyerstedt@consider-it.de>
Date: Mon, 3 Aug 2026 11:45:28 +0200
Subject: [PATCH] FIXUP: use user LED

---
 src/main.rs | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index d9d77f8..154082a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -76,6 +76,7 @@ esp_bootloader_esp_idf::esp_app_desc!();
 #[cfg(feature = "_gnss")]
 static GNSS_UPDATE: Mutex<RefCell<Option<applogic::GnssFix>>> = Mutex::new(RefCell::new(None));
 static WIFI_RX_QUEUE: Mutex<RefCell<Option<ArrayQueue<Vec<u8>>>>> = Mutex::new(RefCell::new(None));
+static mut USER_LED: Option<esp_hal::gpio::Output<'static>> = None;
 #[cfg(feature = "_uart")]
 static UART_RX_BUF: Mutex<RefCell<Option<Vec<u8>>>> = Mutex::new(RefCell::new(None));
 #[cfg(feature = "_uart")]
@@ -176,6 +177,13 @@ async fn main(spawner: Spawner) -> ! {
         error!("Failed to set WiFi TX power: {err}");
     }
 
+    unsafe {
+        USER_LED = Some(esp_hal::gpio::Output::new(
+            peripherals.GPIO27,
+            esp_hal::gpio::Level::Low,
+            esp_hal::gpio::OutputConfig::default(),
+        ));
+    }
     critical_section::with(|cs| {
         WIFI_RX_QUEUE.borrow(cs).replace(Some(ArrayQueue::new(2)));
     });
@@ -531,8 +539,6 @@ fn handle_frame(frame: esp_radio::wifi::sniffer::PromiscuousPkt<'_>) {
             .naive_utc()
     };
 
-    esp_println::print!("."); // TODO: debug only!
-
     match esp32_cits_core::rx::is_broadcast_frame(&frame) {
         Err(err) => {
             warn!("{err}");
@@ -548,6 +554,13 @@ fn handle_frame(frame: esp_radio::wifi::sniffer::PromiscuousPkt<'_>) {
     }
 
     // info!("Received frame with {} bytes", frame.len);
+    esp_println::print!("."); // TODO: debug only!
+    unsafe {
+        #[allow(static_mut_refs)]
+        if let Some(ref mut led) = USER_LED.as_mut() {
+            led.toggle();
+        }
+    }
 
     // parse GN headers
     match c_its_parser::pcap::remove_wlan_headers(frame.data)