diff --git a/pkgs/development/python-modules/oemthermostat/default.nix b/pkgs/development/python-modules/oemthermostat/default.nix
new file mode 100644
index 000000000000..7a2ecfc26c03
--- /dev/null
+++ b/pkgs/development/python-modules/oemthermostat/default.nix
@@ -0,0 +1,48 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pytestCheckHook
+, pythonOlder
+, requests
+, setuptools-scm
+}:
+
+buildPythonPackage rec {
+  pname = "oemthermostat";
+  version = "1.1.1";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.8";
+
+  src = fetchFromGitHub {
+    owner = "Cadair";
+    repo = "openenergymonitor_thermostat";
+    rev = "v${version}";
+    sha256 = "vrMw3/X8MtejO1WyUA1DOlfVCPTCPgcK5p3+OlTWcM4=";
+  };
+
+  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+
+  nativeBuildInputs = [
+    setuptools-scm
+  ];
+
+  propagatedBuildInputs = [
+    requests
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [
+    "oemthermostat"
+  ];
+
+  meta = with lib; {
+    description = "Python module to interact with OpenEnergyMonitor thermostats";
+    homepage = "https://github.com/Cadair/openenergymonitor_thermostat";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index c0dad534f495..acc3a6f35cf5 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -597,7 +597,7 @@
     "oasa_telematics" = ps: with ps; [ ]; # missing inputs: oasatelematics
     "obihai" = ps: with ps; [ pyobihai ];
     "octoprint" = ps: with ps; [ ]; # missing inputs: pyoctoprintapi
-    "oem" = ps: with ps; [ ]; # missing inputs: oemthermostat
+    "oem" = ps: with ps; [ oemthermostat ];
     "ohmconnect" = ps: with ps; [ defusedxml ];
     "ombi" = ps: with ps; [ pyombi ];
     "omnilogic" = ps: with ps; [ omnilogic ];
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 8fea930437ba..946e6cae428e 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5309,6 +5309,8 @@ in {
 
   ofxtools = callPackage ../development/python-modules/ofxtools { };
 
+  oemthermostat = callPackage ../development/python-modules/oemthermostat { };
+
   olefile = callPackage ../development/python-modules/olefile { };
 
   omegaconf = callPackage ../development/python-modules/omegaconf { };