Buzzer

orchestrateur/main.py

@@ -299,6 +299,10 @@ async def process_messages_task():
                 n_state = data["data"].get("new_cooking_state")
                 print(f"[LoRa] Microwave {mw_id} state changed to: {n_state}")
                 
+                if n_state in (CookingStates.DONE, CookingStates.STIRRING_REQUIRED, CookingStates.ALERT):
+                    print("buzzer alert triggered!")
+                    beats = 5 if n_state == CookingStates.ALERT else (1 if n_state == CookingStates.STIRRING_REQUIRED else 3)
+                    buzzer.buzzer_siren(beatsNb=beats)
                 if n_state == CookingStates.IDLE and microwave_states.get(mw_id) == MicrowaveState.COOKING:
                     microwave_states[mw_id] = MicrowaveState.DONE
                     print(f"[{mw_id}] Cooking finished. Waiting for user to remove dish.")

orchestrateur/sensors/__init__.py

@@ -5,3 +5,4 @@ import sensors.temp_hum as temp_hum
 import sensors.button as button
 import sensors.gps as gps
 import sensors.camera as camera
+import sensors.buzzer as buzzer

orchestrateur/sensors/buzzer.py

@@ -0,0 +1,33 @@
+import time
+import grovepi
+from sensors.lock import grove_lock
+from shared import config
+
+# Pin definition
+BUZZER_PIN = 8
+
+grovepi.pinMode(BUZZER_PIN, "OUTPUT")
+buzzer_state = 0
+
+def set_buzzer(state: int):
+    global buzzer_state
+    buzzer_state = state
+    if not config.BUZZER_ACTIVATED:
+        return
+    try:
+        with grove_lock:
+            grovepi.digitalWrite(BUZZER_PIN, state)
+    except Exception as e:
+        print(f"[BUZZER] Error occurred while setting buzzer state: {e}")   
+
+def buzzer_toggle():
+    global buzzer_state
+    new_state = 1 - buzzer_state
+    set_buzzer(new_state)
+    
+def buzzer_siren(beatsNb: int = 3, delay: float = 0.3):
+    for _ in range(beatsNb):
+        set_buzzer(1)
+        time.sleep(delay)
+        set_buzzer(0)
+        time.sleep(delay)

shared/config.py

@@ -16,3 +16,5 @@ MQTT_HELLO_INTERVAL = 30
 
 # Microwave Model
 COOKING_COMPARTMENT_HEIGHT = 30  # cm
+
+BUZZER_ACTIVATED = False