diff --git a/pkgs/development/python-modules/arwn-client/default.nix b/pkgs/development/python-modules/arwn-client/default.nix
new file mode 100644
index 000000000000..b406704a86bf
--- /dev/null
+++ b/pkgs/development/python-modules/arwn-client/default.nix
@@ -0,0 +1,42 @@
+{
+  lib,
+  buildPythonPackage,
+  fetchFromGitHub,
+  setuptools,
+  click,
+  paho-mqtt,
+  pytestCheckHook,
+}:
+
+buildPythonPackage (finalAttrs: {
+  pname = "arwn-client";
+  version = "0.2.1";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "sdague";
+    repo = "arwn-client";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-By4dZlzR3It4UkYss+RPsKt9Easkegv6VbLd0SSaC2U=";
+  };
+
+  build-system = [ setuptools ];
+
+  dependencies = [
+    click
+    paho-mqtt
+  ];
+
+  nativeCheckInputs = [ pytestCheckHook ];
+
+  pythonImportsCheck = [ "arwn_client" ];
+
+  meta = {
+    description = "Python client library for parsing ARWN weather station MQTT messages";
+    homepage = "https://github.com/sdague/arwn-client";
+    changelog = "https://github.com/sdague/arwn-client/releases/tag/${finalAttrs.src.tag}";
+    license = lib.licenses.asl20;
+    mainProgram = "arwn-client";
+    maintainers = [ lib.maintainers.jamiemagee ];
+  };
+})
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index 6f11a06ba4fb..d4ce6e271a27 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -417,8 +417,9 @@
     "arwn" =
       ps: with ps; [
         aiohasupervisor
+        arwn-client
         paho-mqtt
-      ]; # missing inputs: arwn-client
+      ];
     "aseko_pool_live" =
       ps: with ps; [
         aioaseko
@@ -7847,6 +7848,7 @@
     "aranet"
     "arcam_fmj"
     "arve"
+    "arwn"
     "aseko_pool_live"
     "assist_pipeline"
     "assist_satellite"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 498b2badb153..39b4bff59199 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1347,6 +1347,8 @@ self: super: with self; {
 
   arviz-stats = callPackage ../development/python-modules/arviz-stats { };
 
+  arwn-client = callPackage ../development/python-modules/arwn-client { };
+
   arxiv = callPackage ../development/python-modules/arxiv { };
 
   arxiv2bib = callPackage ../development/python-modules/arxiv2bib { };