Small things because fuck sd cards

orchestrateur/sensors/rfid_reader.py

@@ -1,7 +1,7 @@
 import time
 import pigpio
 from typing import Optional
-from sensors.lock import serial_lock
+from sensors.lock import safe_serial_access
 
 
 class RFIDReader:
@@ -19,7 +19,10 @@ class RFIDReader:
         if not self.pi.connected:
             raise RuntimeError("pigpio daemon is not running. Run 'sudo systemctl start pigpiod'.")
 
-        with serial_lock:
+        with safe_serial_access(timeout=1.0) as acquired:
+            if not acquired:
+                raise RuntimeError("RFID: Could not acquire serial lock during initialization")
+
             self.pi.set_mode(self.rx_pin, pigpio.INPUT)
             
             # Clean up lingering serial sessions on this pin
@@ -34,7 +37,10 @@ class RFIDReader:
         """
         Reads and accumulates bytes, returning the 10-digit Tag ID.
         """
-        with serial_lock:
+        with safe_serial_access(timeout=0.5) as acquired:
+            if not acquired:
+                return None
+
             if not self.pi or not self.pi.connected:
                 return None
 
@@ -70,7 +76,7 @@ class RFIDReader:
         return None
 
     def close(self):
-        with serial_lock:
+        with safe_serial_access(timeout=1.0) as acquired:
             if self.pi and self.pi.connected:
                 try:
                     self.pi.bb_serial_read_close(self.rx_pin)