From b4faeac869eae04ca74fc3255b10bc2f58ae7b12 Mon Sep 17 00:00:00 2001
From: Sam Stenvall <sam.stenvall@nitor.com>
Date: Fri, 13 Sep 2024 09:44:56 +0300
Subject: [PATCH] Specify a unique ID for config flows to prevent adding the
 same device twice

---
 custom_components/extron/config_flow.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/custom_components/extron/config_flow.py b/custom_components/extron/config_flow.py
index 03cc454..9050733 100644
--- a/custom_components/extron/config_flow.py
+++ b/custom_components/extron/config_flow.py
@@ -7,6 +7,7 @@
 import voluptuous as vol
 
 from homeassistant.config_entries import ConfigEntry, ConfigFlow, OptionsFlow
+from homeassistant.helpers.device_registry import format_mac
 from homeassistant.helpers.selector import selector
 
 from .const import CONF_DEVICE_TYPE, CONF_HOST, CONF_PASSWORD, CONF_PORT, DOMAIN, OPTION_INPUT_NAMES
@@ -51,6 +52,11 @@ async def async_step_user(self, user_input: dict[str, Any] | None = None):
                 model_name = await extron_device.query_model_name()
                 title = f"Extron {model_name}"
 
+                # Make a unique ID for the entry, prevent adding the same device twice
+                unique_id = format_mac(await extron_device.query_mac_address())
+                await self.async_set_unique_id(unique_id)
+                self._abort_if_unique_id_configured()
+
                 # Disconnect, we'll connect again later, this was just for validation
                 await extron_device.disconnect()
             except AuthenticationError: