diff --git a/pkgs/development/python-modules/pysml/default.nix b/pkgs/development/python-modules/pysml/default.nix
new file mode 100644
index 000000000000..1f08eb14180c
--- /dev/null
+++ b/pkgs/development/python-modules/pysml/default.nix
@@ -0,0 +1,37 @@
+{ lib
+, async-timeout
+, bitstring
+, buildPythonPackage
+, fetchFromGitHub
+, pyserial-asyncio
+}:
+
+buildPythonPackage rec {
+  pname = "pysml";
+  version = "0.0.5";
+
+  src = fetchFromGitHub {
+    owner = "mtdcr";
+    repo = pname;
+    rev = version;
+    sha256 = "05zgrk49b2y5jflxnjww2kqg1flynl3j4ifm0jr28nk0li5wg2bs";
+  };
+
+  propagatedBuildInputs = [
+    async-timeout
+    bitstring
+    pyserial-asyncio
+  ];
+
+  # Project has no tests
+  doCheck = false;
+
+  pythonImportsCheck = [ "sml" ];
+
+  meta = with lib; {
+    description = "Python library for EDL21 smart meters using Smart Message Language (SML)";
+    homepage = "https://github.com/mtdcr/pysml";
+    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 ed8236f12897..d85d877ca444 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -208,7 +208,7 @@
     "ecovacs" = ps: with ps; [ ]; # missing inputs: sucks
     "eddystone_temperature" = ps: with ps; [ construct ]; # missing inputs: beacontools[scan]
     "edimax" = ps: with ps; [ pyedimax ];
-    "edl21" = ps: with ps; [ ]; # missing inputs: pysml
+    "edl21" = ps: with ps; [ pysml ];
     "ee_brightbox" = ps: with ps; [ eebrightbox ];
     "efergy" = ps: with ps; [ ];
     "egardia" = ps: with ps; [ pythonegardia ];
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index fd516dc29220..c83823156474 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -6508,6 +6508,8 @@ in {
 
   pysmi = callPackage ../development/python-modules/pysmi { };
 
+  pysml = callPackage ../development/python-modules/pysml { };
+
   pysmt = callPackage ../development/python-modules/pysmt { };
 
   pysnmp = callPackage ../development/python-modules/pysnmp { };