diff --git a/flake.lock b/flake.lock
index a10a24c..2fab2d7 100644
--- a/flake.lock
+++ b/flake.lock
@@ -732,6 +732,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-otbr": {
+      "locked": {
+        "lastModified": 1766776257,
+        "narHash": "sha256-MG9DnzBn6TdAztaMPVhW9sjYj2bi9Jcux0F0fJ6LeO4=",
+        "owner": "mrene",
+        "repo": "nixpkgs",
+        "rev": "0c4c97066d555b7d27a0a56ee400130ec51f02ee",
+        "type": "github"
+      },
+      "original": {
+        "owner": "mrene",
+        "ref": "openthread-border-router",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-stable": {
       "locked": {
         "lastModified": 1772598333,
@@ -859,6 +875,7 @@
         "nix-minecraft": "nix-minecraft",
         "nixgl": "nixgl",
         "nixpkgs": "nixpkgs_3",
+        "nixpkgs-otbr": "nixpkgs-otbr",
         "nixvim": "nixvim",
         "noctalia": "noctalia",
         "starship-jj": "starship-jj",
diff --git a/flake.nix b/flake.nix
index bdc101e..2cc5b3e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -76,6 +76,9 @@
       url = "gitlab:lanastara_foss/starship-jj";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    nixpkgs-otbr = {
+      url = "github:mrene/nixpkgs/openthread-border-router";
+    };
   };
 
   outputs =
diff --git a/hosts/watt/configuration.nix b/hosts/watt/configuration.nix
index 9edc1cf..d55cc09 100644
--- a/hosts/watt/configuration.nix
+++ b/hosts/watt/configuration.nix
@@ -15,6 +15,7 @@
     ../../modules/system/gc.nix
     ../../modules/system/nixvim.nix
     ../../modules/system/tailscale.nix
+    ../../modules/system/home-assistant.nix
     inputs.disko.nixosModules.disko
     inputs.nixvim.nixosModules.nixvim
   ];
diff --git a/modules/system/home-assistant.nix b/modules/system/home-assistant.nix
new file mode 100644
index 0000000..c9e1d06
--- /dev/null
+++ b/modules/system/home-assistant.nix
@@ -0,0 +1,48 @@
+{ config, pkgs, inputs, ... }:
+{
+  imports = [
+    (inputs.nixpkgs-otbr + "/nixos/modules/services/home-automation/openthread-border-router.nix")
+  ];
+
+  services.openthread-border-router = {
+    enable = true;
+    package = (import inputs.nixpkgs-otbr { system = pkgs.system; }).openthread-border-router;
+    backboneInterface = "enp7s0u2c2";
+    radio = {
+      device = "/dev/serial/by-id/usb-Nabu_Casa_ZBT-2_9C139EAAD5E8-if00";
+      baudRate = 460800;
+      flowControl = true;
+    };
+  };
+
+  services.matter-server.enable = true;
+
+  services.home-assistant = {
+    enable = true;
+    extraComponents = [
+      # Required for onboarding
+      "esphome"
+      "matter"
+      "met"
+      "otbr"
+      "thread"
+      "radio_browser"
+    ];
+    config = {
+      homeassistant = {
+        name = "Home";
+        unit_system = "metric";
+        time_zone = config.time.timeZone;
+      };
+      default_config = { };
+      http = {
+        server_port = 8123;
+        use_x_forwarded_for = true;
+        trusted_proxies = [
+          "127.0.0.1"
+          "::1"
+        ];
+      };
+    };
+  };
+}