diff --git a/APP/main.c b/APP/main.c
index 8e10d42..d6a4b0c 100644
--- a/APP/main.c
+++ b/APP/main.c
@@ -41,7 +41,10 @@ void hardware_init() {
 }
 void hardware_default_settings() { mf_init_all_subdevice_state(); }
 
-void flip_debuf_light_level() { /*printf("flip_debuf_light_level\n");*/
+void flip_debuf_light_level() {
+  static uint8_t debug_led_state = 1;
+  debug_led_state = !debug_led_state;
+  port_debug_set(debug_led_state);
 }
 
 int main() {
@@ -56,7 +59,7 @@ int main() {
     END();
 
     // debug light
-    DO_IT_EACH_MS(2000) { flip_debuf_light_level(); }
+    DO_IT_EACH_MS(150) { flip_debuf_light_level(); }
     END();
   }