Use zip_longest to fix behavior when no config_update_coordinators ar…

…e present

diagnostics.py

@@ -1,6 +1,7 @@
 """Diagnostics support for Velbus."""
 from __future__ import annotations
 
+from itertools import zip_longest
 from typing import Any
 
 from homeassistant.components.diagnostics import async_redact_data
@@ -36,7 +37,9 @@ async def async_get_config_entry_diagnostics(
     diagnostics_data = {
         "config_entry_data": async_redact_data(dict(entry.data), TO_REDACT)
     }
-    for coordinator, config_coordinator in zip(coordinators, config_coordinators):
+    for coordinator, config_coordinator in zip_longest(
+        coordinators, config_coordinators
+    ):
         diagnostics_data[
             f"slave_{coordinator.bridge.slave_id}"
         ] = await _build_bridge_diagnostics_info(coordinator.bridge)

sensor.py

@@ -4,6 +4,7 @@
 from collections.abc import Callable
 from dataclasses import dataclass
 from typing import Any, Union
+from itertools import zip_longest
 
 from homeassistant.components.sensor import (
     SensorDeviceClass,
@@ -682,7 +683,7 @@ async def async_setup_entry(
 
     entities_to_add: list[SensorEntity] = []
     for idx, (update_coordinator, configuration_update_coordinator) in enumerate(
-        zip(update_coordinators, configuration_update_coordinators)
+        zip_longest(update_coordinators, configuration_update_coordinators)
     ):
         slave_entities: list[HuaweiSolarSensorEntity] = []
 

switch.py

@@ -245,7 +245,7 @@ def _handle_coordinator_update(self) -> None:
 
     async def async_turn_on(self, **kwargs) -> None:
         """Turn the setting on."""
-        with self._change_lock:
+        async with self._change_lock:
 
             await self.bridge.set(rn.STARTUP, 0)
 
@@ -264,7 +264,7 @@ async def async_turn_on(self, **kwargs) -> None:
     async def async_turn_off(self, **kwargs) -> None:
         """Turn the setting off."""
 
-        with self._change_lock:
+        async with self._change_lock:
             await self.bridge.set(rn.SHUTDOWN, 0)
 
             # Turning on can take up to 5 minutes... We'll poll every 15 seconds