Wait, is this peak ?

orchestrateur/sensors/button.py

@@ -11,7 +11,8 @@ grovepi.pinMode(button, "INPUT")
 button_callback = None
 
 def read_button_state():
-    if not grove_lock.acquire(timeout=0.05):
+    # Increase timeout slightly so the button thread can wait for long I2C sensor reads to finish
+    if not grove_lock.acquire(timeout=0.2):
         return None
     try:
         return grovepi.digitalRead(button)
@@ -26,15 +27,18 @@ def monitor_button():
     last_button_state = button_switch_state
     
     while True:
-        time.sleep(0.04) 
-
         current_state = read_button_state()
         
         if current_state is not None:
+            # Rising edge detection (0 -> 1 transition)
             if current_state == 1 and last_button_state == 0:
                 if button_callback:
                     button_callback()
             last_button_state = current_state
+            time.sleep(0.02)  # Fast 20ms poll when lock is clear
+        else:
+            # Lock was busy; retry quickly without updating last_button_state
+            time.sleep(0.01)
 
 def start_button_monitoring_thread():
     threading.Thread(target=monitor_button, daemon=True).start()