diff --git a/pkgs/development/python-modules/p1monitor/default.nix b/pkgs/development/python-modules/p1monitor/default.nix
new file mode 100644
index 000000000000..4a7ce2aec3f2
--- /dev/null
+++ b/pkgs/development/python-modules/p1monitor/default.nix
@@ -0,0 +1,45 @@
+{ lib
+, aiohttp
+, aresponses
+, buildPythonPackage
+, fetchFromGitHub
+, poetry-core
+, pythonOlder
+, yarl
+}:
+
+buildPythonPackage rec {
+  pname = "p1monitor";
+  version = "1.0.0";
+  format = "pyproject";
+
+  disabled = pythonOlder "3.8";
+
+  src = fetchFromGitHub {
+    owner = "klaasnicolaas";
+    repo = "python-p1monitor";
+    rev = "v${version}";
+    sha256 = "1xfr097hmjppp6cfdvfjypxmr1sb9dasq1s3np2vd5d93w0p5123";
+  };
+
+  nativeBuildInputs = [
+    poetry-core
+  ];
+
+  propagatedBuildInputs = [
+    aiohttp
+    yarl
+  ];
+
+  # Project has no tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "p1monitor" ];
+
+  meta = with lib; {
+    description = "Python client for the P1 Monitor";
+    homepage = "https://github.com/klaasnicolaas/python-p1monitor";
+    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 67c550d6f557..c04acec1a748 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -630,7 +630,7 @@
     "ovo_energy" = ps: with ps; [ ovoenergy ];
     "owntracks" = ps: with ps; [ pynacl pyturbojpeg aiohttp-cors hass-nabucasa paho-mqtt ];
     "ozw" = ps: with ps; [ aiohttp-cors paho-mqtt python-openzwave-mqtt ];
-    "p1_monitor" = ps: with ps; [ ]; # missing inputs: p1monitor
+    "p1_monitor" = ps: with ps; [ p1monitor ];
     "panasonic_bluray" = ps: with ps; [ ]; # missing inputs: panacotta
     "panasonic_viera" = ps: with ps; [ ]; # missing inputs: panasonic_viera
     "pandora" = ps: with ps; [ pexpect ];
diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index 27c34e10e382..aec31de177b2 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -545,6 +545,7 @@ in with py.pkgs; buildPythonApplication rec {
     "ovo_energy"
     "owntracks"
     "ozw"
+    "p1_monitor"
     "panel_custom"
     "panel_iframe"
     "persistent_notification"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index f202b49c953e..ea42beac6fd6 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -5243,6 +5243,8 @@ in {
 
   oyaml = callPackage ../development/python-modules/oyaml { };
 
+  p1monitor = callPackage ../development/python-modules/p1monitor { };
+
   packageurl-python = callPackage ../development/python-modules/packageurl-python { };
 
   packaging = callPackage ../development/python-modules/packaging { };