diff --git a/pkgs/development/python-modules/upb-lib/default.nix b/pkgs/development/python-modules/upb-lib/default.nix
new file mode 100644
index 000000000000..356a290241ed
--- /dev/null
+++ b/pkgs/development/python-modules/upb-lib/default.nix
@@ -0,0 +1,36 @@
+{ lib
+, buildPythonPackage
+, pythonOlder
+, fetchPypi
+, pyserial-asyncio
+, pytz
+}:
+
+buildPythonPackage rec {
+  pname = "upb-lib";
+  version = "0.4.12";
+
+  disabled = pythonOlder "3.7";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "e668055d9c389aefd09203afb96a950a320095f225ef0a1aa611e592db92a71b";
+  };
+
+  propagatedBuildInputs = [
+    pyserial-asyncio
+    pytz
+  ];
+
+  # no tests on PyPI, no tags on GitHub
+  doCheck = false;
+
+  pythonImportsCheck = [ "upb_lib" ];
+
+  meta = with lib; {
+    description = "Library for interacting with UPB PIM";
+    homepage = "https://github.com/gwww/upb-lib";
+    license = licenses.mit;
+    maintainers = with maintainers; [ dotlambda ];
+  };
+}
diff --git a/pkgs/servers/home-assistant/component-packages.nix b/pkgs/servers/home-assistant/component-packages.nix
index a5f6d670f621..8fff6d0c3df2 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -903,7 +903,7 @@
     "unifi_direct" = ps: with ps; [ pexpect ];
     "unifiled" = ps: with ps; [ unifiled ];
     "universal" = ps: with ps; [ ];
-    "upb" = ps: with ps; [ ]; # missing inputs: upb_lib
+    "upb" = ps: with ps; [ upb-lib ];
     "upc_connect" = ps: with ps; [ connect-box ];
     "upcloud" = ps: with ps; [ ]; # missing inputs: upcloud-api
     "updater" = ps: with ps; [ distro ];
diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index 6cb89f9fd301..eb05ecd9e6e4 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -715,6 +715,7 @@ in with py.pkgs; buildPythonApplication rec {
     "unifi"
     "unifi_direct"
     "universal"
+    "upb"
     "updater"
     "upnp"
     "uptime"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 61c095e32154..723751e7877c 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -8839,6 +8839,8 @@ in {
 
   upass = callPackage ../development/python-modules/upass { };
 
+  upb-lib = callPackage ../development/python-modules/upb-lib { };
+
   update_checker = callPackage ../development/python-modules/update_checker { };
 
   update-copyright = callPackage ../development/python-modules/update-copyright { };