Retry BLE with fresh LE scan on br-connection-not-supported (0.1.15)

fichero/printer.py

@@ -450,6 +450,7 @@ async def connect(
             )
 
         last_exc: Exception | None = None
+        forced_rescan_done = False
         for attempt in range(1, BLE_CONNECT_RETRIES + 1):
             try:
                 async with BleakClient(target) as client:
@@ -466,8 +467,15 @@ async def connect(
             except BleakDBusError as exc:
                 msg = str(exc).lower()
                 if "br-connection-not-supported" in msg:
+                    last_exc = exc
+                    if not forced_rescan_done:
+                        forced_rescan_done = True
+                        target = await resolve_ble_target(None)
+                        if attempt < BLE_CONNECT_RETRIES:
+                            await asyncio.sleep(BLE_CONNECT_BACKOFF * attempt)
+                            continue
                     raise PrinterError(
-                        "BLE connection failed (br-connection-not-supported). "
+                        "BLE connection failed (br-connection-not-supported) after LE rescan. "
                         "Try Classic Bluetooth with classic=true and channel=1."
                     ) from exc
                 last_exc = exc