diff --git a/pkgs/development/python-modules/millheater/default.nix b/pkgs/development/python-modules/millheater/default.nix
new file mode 100644
index 000000000000..7639de14a670
--- /dev/null
+++ b/pkgs/development/python-modules/millheater/default.nix
@@ -0,0 +1,37 @@
+{ lib
+, aiohttp
+, async-timeout
+, buildPythonPackage
+, fetchFromGitHub
+, pythonOlder
+}:
+
+buildPythonPackage rec {
+  pname = "millheater";
+  version = "0.4.1";
+  disabled = pythonOlder "3.6";
+
+  src = fetchFromGitHub {
+    owner = "Danielhiversen";
+    repo = "pymill";
+    rev = version;
+    sha256 = "0dypv4xwdqcv45aibfkik2slm9r8y7pd2gwqa49kn96f40kdfwb0";
+  };
+
+  propagatedBuildInputs = [
+    aiohttp
+    async-timeout
+  ];
+
+  # Project has no tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "mill" ];
+
+  meta = with lib; {
+    description = "Python library for Mill heater devices";
+    homepage = "https://github.com/Danielhiversen/pymill";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index 6c3ce7142375..06a1a53d5203 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -510,7 +510,7 @@
     "microsoft_face_identify" = ps: with ps; [ aiohttp-cors ];
     "miflora" = ps: with ps; [ bluepy ]; # missing inputs: miflora
     "mikrotik" = ps: with ps; [ librouteros ];
-    "mill" = ps: with ps; [ ]; # missing inputs: millheater
+    "mill" = ps: with ps; [ millheater ];
     "min_max" = ps: with ps; [ ];
     "minecraft_server" = ps: with ps; [ aiodns getmac mcstatus ];
     "minio" = ps: with ps; [ minio ];
diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index 3fa5d86f264d..8c73e23ef992 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -515,6 +515,7 @@ in with py.pkgs; buildPythonApplication rec {
     "microsoft_face_detect"
     "microsoft_face_identify"
     "mikrotik"
+    "mill"
     "min_max"
     "minecraft_server"
     "minio"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f4690c71f717..7d212cb5ea0e 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4385,6 +4385,8 @@ in {
 
   milksnake = callPackage ../development/python-modules/milksnake { };
 
+  millheater = callPackage ../development/python-modules/millheater { };
+
   minidb = callPackage ../development/python-modules/minidb { };
 
   minidump = callPackage ../development/python-modules/minidump { };