Fix handling of non-supported devices in led-ble (#136300)

homeassistant/components/led_ble/config_flow.py

@@ -6,7 +6,7 @@ import logging
 from typing import Any
 
 from bluetooth_data_tools import human_readable_name
-from led_ble import BLEAK_EXCEPTIONS, LEDBLE
+from led_ble import BLEAK_EXCEPTIONS, LEDBLE, CharacteristicMissingError
 import voluptuous as vol
 
 from homeassistant.components.bluetooth import (
@@ -66,6 +66,8 @@ class LedBleConfigFlow(ConfigFlow, domain=DOMAIN):
             led_ble = LEDBLE(discovery_info.device)
             try:
                 await led_ble.update()
+            except CharacteristicMissingError:
+                return self.async_abort(reason="not_supported")
             except BLEAK_EXCEPTIONS:
                 errors["base"] = "cannot_connect"
             except Exception:

tests/components/led_ble/test_config_flow.py

@@ -3,6 +3,7 @@
 from unittest.mock import patch
 
 from bleak import BleakError
+from led_ble import CharacteristicMissingError
 
 from homeassistant import config_entries
 from homeassistant.components.led_ble.const import DOMAIN
@@ -202,6 +203,35 @@ async def test_user_step_unknown_exception(hass: HomeAssistant) -> None:
     assert len(mock_setup_entry.mock_calls) == 1
 
 
+async def test_user_step_not_supported(hass: HomeAssistant) -> None:
+    """Test user step with a non supported device."""
+    with patch(
+        "homeassistant.components.led_ble.config_flow.async_discovered_service_info",
+        return_value=[LED_BLE_DISCOVERY_INFO],
+    ):
+        result = await hass.config_entries.flow.async_init(
+            DOMAIN, context={"source": config_entries.SOURCE_USER}
+        )
+    assert result["type"] is FlowResultType.FORM
+    assert result["step_id"] == "user"
+    assert result["errors"] == {}
+
+    with patch(
+        "homeassistant.components.led_ble.config_flow.LEDBLE.update",
+        side_effect=CharacteristicMissingError,
+    ):
+        result2 = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            {
+                CONF_ADDRESS: LED_BLE_DISCOVERY_INFO.address,
+            },
+        )
+        await hass.async_block_till_done()
+
+    assert result2["type"] is FlowResultType.ABORT
+    assert result2["reason"] == "not_supported"
+
+
 async def test_bluetooth_step_success(hass: HomeAssistant) -> None:
     """Test bluetooth step success path."""
     result = await hass.config_entries.flow.async_init(