diff --git a/pkgs/development/python-modules/dsmr-parser/default.nix b/pkgs/development/python-modules/dsmr-parser/default.nix
new file mode 100644
index 00000000000..155927368ee
--- /dev/null
+++ b/pkgs/development/python-modules/dsmr-parser/default.nix
@@ -0,0 +1,41 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, pyserial
+, pyserial-asyncio
+, pytestCheckHook
+, pytz
+, tailer
+}:
+
+buildPythonPackage rec {
+  pname = "dsmr-parser";
+  version = "0.29";
+
+  src = fetchFromGitHub {
+    owner = "ndokter";
+    repo = "dsmr_parser";
+    rev = "v${version}";
+    sha256 = "11d6cwmabzc8p6jkqwj72nrj7p6cxbvr0x3jdrxyx6zki8chyw4p";
+  };
+
+  propagatedBuildInputs = [
+    pyserial
+    pyserial-asyncio
+    pytz
+    tailer
+  ];
+
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  pythonImportsCheck = [ "dsmr_parser" ];
+
+  meta = with lib; {
+    description = "Python module to parse Dutch Smart Meter Requirements (DSMR)";
+    homepage = "https://github.com/ndokter/dsmr_parser";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ fab ];
+  };
+}
diff --git a/pkgs/development/python-modules/tailer/default.nix b/pkgs/development/python-modules/tailer/default.nix
new file mode 100644
index 00000000000..b8e19b7d97d
--- /dev/null
+++ b/pkgs/development/python-modules/tailer/default.nix
@@ -0,0 +1,32 @@
+{ lib
+, buildPythonPackage
+, fetchFromGitHub
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "tailer";
+  version = "0.4.1";
+
+  src = fetchFromGitHub {
+    owner = "six8";
+    repo = "pytailer";
+    rev = version;
+    sha256 = "1s5p5m3q9k7r1m0wx5wcxf20xzs0rj14qwg1ydwhf6adr17y2w5y";
+  };
+
+  checkPhase = ''
+    runHook preCheck
+    ${python.interpreter} -m doctest -v src/tailer/__init__.py
+    runHook postCheck
+  '';
+
+  pythonImportsCheck = [ "tailer" ];
+
+  meta = with lib; {
+    description = "Python implementation implementation of GNU tail and head";
+    homepage = "https://github.com/six8/pytailer";
+    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 b71be6be6dd..4d86e743d15 100644
--- a/pkgs/servers/home-assistant/component-packages.nix
+++ b/pkgs/servers/home-assistant/component-packages.nix
@@ -187,7 +187,7 @@
     "doorbird" = ps: with ps; [ aiohttp-cors ]; # missing inputs: doorbirdpy
     "dovado" = ps: with ps; [ ]; # missing inputs: dovado
     "downloader" = ps: with ps; [ ];
-    "dsmr" = ps: with ps; [ ]; # missing inputs: dsmr_parser
+    "dsmr" = ps: with ps; [ dsmr-parser ];
     "dsmr_reader" = ps: with ps; [ aiohttp-cors paho-mqtt ];
     "dte_energy_bridge" = ps: with ps; [ ];
     "dublin_bus_transport" = ps: with ps; [ ];
diff --git a/pkgs/servers/home-assistant/default.nix b/pkgs/servers/home-assistant/default.nix
index f3d312cd3f5..ea9a7f5d150 100644
--- a/pkgs/servers/home-assistant/default.nix
+++ b/pkgs/servers/home-assistant/default.nix
@@ -228,6 +228,7 @@ in with py.pkgs; buildPythonApplication rec {
     "devolo_home_control"
     "dhcp"
     "discovery"
+    "dsmr"
     "econet"
     "emulated_hue"
     "esphome"
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 5f7de470d2b..52597041382 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -2109,6 +2109,8 @@ in {
 
   ds4drv = callPackage ../development/python-modules/ds4drv { };
 
+  dsmr-parser = callPackage ../development/python-modules/dsmr-parser { };
+
   dtopt = callPackage ../development/python-modules/dtopt { };
 
   duckdb = callPackage ../development/python-modules/duckdb {
@@ -8288,6 +8290,8 @@ in {
 
   tahoma-api = callPackage ../development/python-modules/tahoma-api { };
 
+  tailer = callPackage ../development/python-modules/tailer { };
+
   tarman = callPackage ../development/python-modules/tarman { };
 
   tasklib = callPackage ../development/python-modules/tasklib { };