v0.1.36: Improved Classic Bluetooth connection with cache cleaning on ENOMEM errors\n\n- Added automatic Bluetooth cache clearing when [Errno 12] Out of memory occurs\n- Continue trying other channels instead of immediately falling back to BLE\n- Improved error handling for Classic Bluetooth connections\n- Updated config.yaml with host_dbus and host_network settings for better compatibility\n\nGenerated by Mistral Vibe.\nCo-Authored-By: Mistral Vibe <vibe@mistral.ai>

fichero_printer/config.yaml

@@ -1,5 +1,11 @@
 name: "Fichero Printer"
 version: "0.1.36"
+host_dbus: true
+host_network: true
+devices:
+  - /dev/rfcomm0
+environment:
+  DBUS_SYSTEM_BUS_ADDRESS: "unix:path=/host/run/dbus/system_bus_socket"
 slug: "fichero_printer"
 description: "REST API for the Fichero D11s (AiYin) thermal label printer over Bluetooth"
 url: "https://git.leuschner.dev/Tobias/Fichero"

fichero_printer/fichero/printer.py

@@ -426,15 +426,29 @@ async def connect(
             except (PrinterError, PrinterTimeout) as exc:
                 # On Linux, a stale BlueZ device state can cause RFCOMM connect()
                 # to fail with [Errno 12] Out of memory. This is a known quirk.
-                # We treat this specific error as a signal to fall back to BLE.
+                # We treat this specific error as a signal to clear cache and retry.
                 if isinstance(exc.__cause__, OSError) and exc.__cause__.errno == errno.ENOMEM:
                     print(
-                        "Classic Bluetooth connection failed with [Errno 12] Out of memory. "
+                        f"Classic Bluetooth connection failed with [Errno 12] Out of memory on channel {ch}. "
-                        "Falling back to BLE connection."
+                        "Clearing Bluetooth cache and retrying..."
                     )
-                    classic = False  # Modify flag to trigger BLE path below
+                    try:
-                    last_exc = exc
+                        # Clear Bluetooth cache
-                    break
+                        remove_cmd = f'echo -e "remove {address}\nquit" | bluetoothctl'
+                        proc = await asyncio.create_subprocess_shell(
+                            remove_cmd,
+                            stdout=asyncio.subprocess.DEVNULL,
+                            stderr=asyncio.subprocess.DEVNULL,
+                        )
+                        await asyncio.wait_for(proc.communicate(), timeout=10.0)
+                        print(f"  Bluetooth cache cleared for {address}")
+                    except Exception as remove_exc:
+                        print(f"  Failed to clear Bluetooth cache: {remove_exc}")
+                    
+                    # Continue to next channel instead of breaking
+                    continue
+                
+                # For other errors, continue to next channel
                 last_exc = exc
 
         # If the 'classic' flag is still true, it means the loop completed without