Prefer BLE device object resolution and bump to 0.1.12

fichero_printer/CHANGELOG.md

@@ -1,5 +1,9 @@
 # Changelog
 
+## 0.1.12
+
+- Improved BLE connection target resolution by preferring discovered BLE device objects over raw MAC strings to avoid BlueZ `br-connection-not-supported` on some hosts.
+
 ## 0.1.11
 
 - Fixed unhandled BLE connect timeout (`asyncio.TimeoutError`) that previously caused HTTP 500 responses.

fichero_printer/config.yaml

@@ -1,5 +1,5 @@
 name: "Fichero Printer"
-version: "0.1.11"
+version: "0.1.12"
 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

@@ -90,6 +90,23 @@ async def find_printer() -> str:
     raise PrinterNotFound("No Fichero/D11s printer found. Is it turned on?")
 
 
+async def resolve_ble_target(address: str | None = None):
+    """Resolve a BLE target as Bleak device object when possible.
+
+    Passing a discovered device object to BleakClient helps BlueZ keep the
+    correct LE context for dual-mode environments.
+    """
+    if address:
+        device = await BleakScanner.find_device_by_address(address, timeout=8.0)
+        return device or address
+    devices = await BleakScanner.discover(timeout=8)
+    for d in devices:
+        if d.name and any(d.name.startswith(p) for p in PRINTER_NAME_PREFIXES):
+            print(f"  Found {d.name} at {d.address}")
+            return d
+    raise PrinterNotFound("No Fichero/D11s printer found. Is it turned on?")
+
+
 # --- Status ---
 
 
@@ -406,7 +423,7 @@ async def connect(
             ) from last_exc
         raise PrinterError(f"Classic Bluetooth connection failed for '{address}'.")
     else:
-        addr = address or await find_printer()
+        target = await resolve_ble_target(address)
         def _is_retryable_ble_error(exc: Exception) -> bool:
             msg = str(exc).lower()
             return any(token in msg for token in ("timeout", "timed out", "br-connection-timeout"))
@@ -414,7 +431,7 @@ async def connect(
         last_exc: Exception | None = None
         for attempt in range(1, BLE_CONNECT_RETRIES + 1):
             try:
-                async with BleakClient(addr) as client:
+                async with BleakClient(target) as client:
                     pc = PrinterClient(client)
                     await pc.start()
                     yield pc