diff --git a/homeassistant/components/alarmdecoder/__init__.py b/homeassistant/components/alarmdecoder/__init__.py
index b69b60b82c4..8dd704f1333 100644
--- a/homeassistant/components/alarmdecoder/__init__.py
+++ b/homeassistant/components/alarmdecoder/__init__.py
@@ -59,13 +59,13 @@ async def async_setup_entry(hass: HomeAssistantType, entry: ConfigEntry) -> bool
         hass.data[DOMAIN][entry.entry_id][DATA_RESTART] = False
         controller.close()
 
-    def open_connection(now=None):
+    async def open_connection(now=None):
         """Open a connection to AlarmDecoder."""
         try:
-            controller.open(baud)
+            await hass.async_add_executor_job(controller.open, baud)
         except NoDeviceError:
             _LOGGER.debug("Failed to connect. Retrying in 5 seconds")
-            hass.helpers.event.track_point_in_time(
+            hass.helpers.event.async_track_point_in_time(
                 open_connection, dt_util.utcnow() + timedelta(seconds=5)
             )
             return
@@ -100,8 +100,7 @@ async def async_setup_entry(hass: HomeAssistantType, entry: ConfigEntry) -> bool
         """Handle relay or zone expander message from AlarmDecoder."""
         hass.helpers.dispatcher.dispatcher_send(SIGNAL_REL_MESSAGE, message)
 
-    controller = False
-    baud = ad_connection[CONF_DEVICE_BAUD]
+    baud = ad_connection.get(CONF_DEVICE_BAUD)
     if protocol == PROTOCOL_SOCKET:
         host = ad_connection[CONF_HOST]
         port = ad_connection[CONF_PORT]
@@ -129,7 +128,7 @@ async def async_setup_entry(hass: HomeAssistantType, entry: ConfigEntry) -> bool
         DATA_RESTART: False,
     }
 
-    open_connection()
+    await open_connection()
 
     for component in PLATFORMS:
         hass.async_create_task(
@@ -156,7 +155,7 @@ async def async_unload_entry(hass: HomeAssistantType, entry: ConfigEntry):
 
     hass.data[DOMAIN][entry.entry_id][DATA_REMOVE_UPDATE_LISTENER]()
     hass.data[DOMAIN][entry.entry_id][DATA_REMOVE_STOP_LISTENER]()
-    hass.data[DOMAIN][entry.entry_id][DATA_AD].close()
+    await hass.async_add_executor_job(hass.data[DOMAIN][entry.entry_id][DATA_AD].close)
 
     if hass.data[DOMAIN][entry.entry_id]:
         hass.data[DOMAIN].pop(entry.entry_id)
diff --git a/homeassistant/components/alarmdecoder/alarm_control_panel.py b/homeassistant/components/alarmdecoder/alarm_control_panel.py
index 83288c93c67..bc2d74a5042 100644
--- a/homeassistant/components/alarmdecoder/alarm_control_panel.py
+++ b/homeassistant/components/alarmdecoder/alarm_control_panel.py
@@ -15,7 +15,6 @@ from homeassistant.components.alarm_control_panel.const import (
 from homeassistant.config_entries import ConfigEntry
 from homeassistant.const import (
     ATTR_CODE,
-    ATTR_ENTITY_ID,
     STATE_ALARM_ARMED_AWAY,
     STATE_ALARM_ARMED_HOME,
     STATE_ALARM_ARMED_NIGHT,
@@ -40,21 +39,9 @@ from .const import (
 _LOGGER = logging.getLogger(__name__)
 
 SERVICE_ALARM_TOGGLE_CHIME = "alarm_toggle_chime"
-ALARM_TOGGLE_CHIME_SCHEMA = vol.Schema(
-    {
-        vol.Required(ATTR_ENTITY_ID, default=[]): cv.entity_ids,
-        vol.Required(ATTR_CODE): cv.string,
-    }
-)
 
 SERVICE_ALARM_KEYPRESS = "alarm_keypress"
 ATTR_KEYPRESS = "keypress"
-ALARM_KEYPRESS_SCHEMA = vol.Schema(
-    {
-        vol.Required(ATTR_ENTITY_ID, default=[]): cv.entity_ids,
-        vol.Required(ATTR_KEYPRESS): cv.string,
-    }
-)
 
 
 async def async_setup_entry(
@@ -77,18 +64,20 @@ async def async_setup_entry(
 
     platform.async_register_entity_service(
         SERVICE_ALARM_TOGGLE_CHIME,
-        ALARM_TOGGLE_CHIME_SCHEMA,
+        {
+            vol.Required(ATTR_CODE): cv.string,
+        },
         "alarm_toggle_chime",
     )
 
     platform.async_register_entity_service(
         SERVICE_ALARM_KEYPRESS,
-        ALARM_KEYPRESS_SCHEMA,
+        {
+            vol.Required(ATTR_KEYPRESS): cv.string,
+        },
         "alarm_keypress",
     )
 
-    return True
-
 
 class AlarmDecoderAlarmPanel(AlarmControlPanelEntity):
     """Representation of an AlarmDecoder-based alarm panel."""
diff --git a/homeassistant/components/alarmdecoder/binary_sensor.py b/homeassistant/components/alarmdecoder/binary_sensor.py
index 417dfd6f96a..89b7d00b3a4 100644
--- a/homeassistant/components/alarmdecoder/binary_sensor.py
+++ b/homeassistant/components/alarmdecoder/binary_sensor.py
@@ -40,7 +40,7 @@ async def async_setup_entry(
 
     zones = entry.options.get(OPTIONS_ZONES, DEFAULT_ZONE_OPTIONS)
 
-    devices = []
+    entities = []
     for zone_num in zones:
         zone_info = zones[zone_num]
         zone_type = zone_info[CONF_ZONE_TYPE]
@@ -49,13 +49,12 @@ async def async_setup_entry(
         zone_loop = zone_info.get(CONF_ZONE_LOOP)
         relay_addr = zone_info.get(CONF_RELAY_ADDR)
         relay_chan = zone_info.get(CONF_RELAY_CHAN)
-        device = AlarmDecoderBinarySensor(
+        entity = AlarmDecoderBinarySensor(
             zone_num, zone_name, zone_type, zone_rfid, zone_loop, relay_addr, relay_chan
         )
-        devices.append(device)
+        entities.append(entity)
 
-    async_add_entities(devices)
-    return True
+    async_add_entities(entities)
 
 
 class AlarmDecoderBinarySensor(BinarySensorEntity):
diff --git a/homeassistant/components/alarmdecoder/config_flow.py b/homeassistant/components/alarmdecoder/config_flow.py
index 1f6f049fcb3..74b23f049a7 100644
--- a/homeassistant/components/alarmdecoder/config_flow.py
+++ b/homeassistant/components/alarmdecoder/config_flow.py
@@ -87,8 +87,8 @@ class AlarmDecoderFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
             ):
                 return self.async_abort(reason="already_configured")
             connection = {}
+            baud = None
             if self.protocol == PROTOCOL_SOCKET:
-                baud = connection[CONF_DEVICE_BAUD] = None
                 host = connection[CONF_HOST] = user_input[CONF_HOST]
                 port = connection[CONF_PORT] = user_input[CONF_PORT]
                 title = f"{host}:{port}"
@@ -100,9 +100,13 @@ class AlarmDecoderFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
                 device = SerialDevice(interface=path)
 
             controller = AdExt(device)
+
+            def test_connection():
+                controller.open(baud)
+                controller.close()
+
             try:
-                with controller:
-                    controller.open(baudrate=baud)
+                await self.hass.async_add_executor_job(test_connection)
                 return self.async_create_entry(
                     title=title, data={CONF_PROTOCOL: self.protocol, **connection}
                 )
diff --git a/homeassistant/components/alarmdecoder/strings.json b/homeassistant/components/alarmdecoder/strings.json
index 73e4cc760f2..ed250b92b98 100644
--- a/homeassistant/components/alarmdecoder/strings.json
+++ b/homeassistant/components/alarmdecoder/strings.json
@@ -22,7 +22,7 @@
     },
     "create_entry": { "default": "Successfully connected to AlarmDecoder." },
     "abort": {
-      "already_configured": "AlarmDecoder device is already configured."
+      "already_configured": "[%key:common::config_flow::abort::already_configured_device%]"
     }
   },
   "options": {
diff --git a/homeassistant/components/alarmdecoder/translations/en.json b/homeassistant/components/alarmdecoder/translations/en.json
index 756e1f1479e..55a4ad99d1c 100644
--- a/homeassistant/components/alarmdecoder/translations/en.json
+++ b/homeassistant/components/alarmdecoder/translations/en.json
@@ -1,7 +1,7 @@
 {
     "config": {
         "abort": {
-            "already_configured": "AlarmDecoder device is already configured."
+            "already_configured": "Device is already configured"
         },
         "create_entry": {
             "default": "Successfully connected to AlarmDecoder."
@@ -71,4 +71,4 @@
             }
         }
     }
-}
\ No newline at end of file
+}
diff --git a/tests/components/alarmdecoder/test_config_flow.py b/tests/components/alarmdecoder/test_config_flow.py
index dd7091fd0ef..64f4a604ff3 100644
--- a/tests/components/alarmdecoder/test_config_flow.py
+++ b/tests/components/alarmdecoder/test_config_flow.py
@@ -34,7 +34,7 @@ from tests.common import MockConfigEntry
 
 
 @pytest.mark.parametrize(
-    "protocol,connection,baud,title",
+    "protocol,connection,title",
     [
         (
             PROTOCOL_SOCKET,
@@ -42,7 +42,6 @@ from tests.common import MockConfigEntry
                 CONF_HOST: "alarmdecoder123",
                 CONF_PORT: 10001,
             },
-            None,
             "alarmdecoder123:10001",
         ),
         (
@@ -51,12 +50,11 @@ from tests.common import MockConfigEntry
                 CONF_DEVICE_PATH: "/dev/ttyUSB123",
                 CONF_DEVICE_BAUD: 115000,
             },
-            115000,
             "/dev/ttyUSB123",
         ),
     ],
 )
-async def test_setups(hass: HomeAssistant, protocol, connection, baud, title):
+async def test_setups(hass: HomeAssistant, protocol, connection, title):
     """Test flow for setting up the available AlarmDecoder protocols."""
 
     result = await hass.config_entries.flow.async_init(
@@ -90,7 +88,6 @@ async def test_setups(hass: HomeAssistant, protocol, connection, baud, title):
         assert result["data"] == {
             **connection,
             CONF_PROTOCOL: protocol,
-            CONF_DEVICE_BAUD: baud,
         }
 
     await hass.async_block_till_done()
@@ -142,6 +139,9 @@ async def test_options_arm_flow(hass: HomeAssistant):
     entry = MockConfigEntry(domain=DOMAIN)
     entry.add_to_hass(hass)
 
+    await hass.config_entries.async_setup(entry.entry_id)
+    await hass.async_block_till_done()
+
     result = await hass.config_entries.options.async_init(entry.entry_id)
 
     assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
@@ -177,6 +177,9 @@ async def test_options_zone_flow(hass: HomeAssistant):
     entry = MockConfigEntry(domain=DOMAIN)
     entry.add_to_hass(hass)
 
+    await hass.config_entries.async_setup(entry.entry_id)
+    await hass.async_block_till_done()
+
     result = await hass.config_entries.options.async_init(entry.entry_id)
 
     assert result["type"] == data_entry_flow.RESULT_TYPE_FORM
@@ -250,6 +253,9 @@ async def test_options_zone_flow_validation(hass: HomeAssistant):
     entry = MockConfigEntry(domain=DOMAIN)
     entry.add_to_hass(hass)
 
+    await hass.config_entries.async_setup(entry.entry_id)
+    await hass.async_block_till_done()
+
     result = await hass.config_entries.options.async_init(entry.entry_id)
 
     assert result["type"] == data_entry_flow.RESULT_TYPE_FORM