diff --git a/pkgs/development/python-modules/pymodbus-repl/default.nix b/pkgs/development/python-modules/pymodbus-repl/default.nix
new file mode 100644
index 000000000000..be7d58e3a980
--- /dev/null
+++ b/pkgs/development/python-modules/pymodbus-repl/default.nix
@@ -0,0 +1,66 @@
+{
+  aiohttp,
+  buildPythonPackage,
+  doCheck ? false, # cyclic dependency with pymodbus
+  fetchFromGitHub,
+  lib,
+  poetry-core,
+  prompt-toolkit,
+  pygments,
+  pymodbus,
+  pymodbus-repl,
+  pytest-cov-stub,
+  pytestCheckHook,
+  tabulate,
+  typer,
+}:
+
+buildPythonPackage rec {
+  pname = "pymodbus-repl";
+  version = "2.0.5";
+  pyproject = true;
+
+  src = fetchFromGitHub {
+    owner = "pymodbus-dev";
+    repo = "repl";
+    tag = version;
+    hash = "sha256-jGoYp2nDWMWMX8n0aaG/YP+rQcj2npFbhdy7T1qxByc=";
+  };
+
+  build-system = [ poetry-core ];
+
+  pythonRelaxDeps = [
+    "typer"
+  ];
+
+  dependencies = [
+    aiohttp
+    prompt-toolkit
+    pygments
+    tabulate
+    typer
+  ];
+
+  pythonImportsCheck = [ "pymodbus_repl" ];
+
+  inherit doCheck;
+
+  nativeCheckInputs = [
+    pymodbus
+    pytest-cov-stub
+    pytestCheckHook
+  ];
+
+  passthru.tests = {
+    # currently expected to fail: https://github.com/pymodbus-dev/repl/pull/26
+    pytest = pymodbus-repl.override { doCheck = true; };
+  };
+
+  meta = {
+    changelog = "https://github.com/pymodbus-dev/repl/releases/tag/${src.tag}";
+    description = "REPL client and server for pymodbus";
+    homepage = "https://github.com/pymodbus-dev/repl";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ dotlambda ];
+  };
+}
diff --git a/pkgs/development/python-modules/pymodbus/default.nix b/pkgs/development/python-modules/pymodbus/default.nix
index 25c768fb9def..a776ccd96aa9 100644
--- a/pkgs/development/python-modules/pymodbus/default.nix
+++ b/pkgs/development/python-modules/pymodbus/default.nix
@@ -6,12 +6,12 @@
   fetchFromGitHub,
   prompt-toolkit,
   pygments,
+  pymodbus-repl,
   pyserial,
   pytest-asyncio,
   pytest-cov-stub,
   pytest-xdist,
   pytestCheckHook,
-  pythonOlder,
   redis,
   setuptools,
   sqlalchemy,
@@ -21,29 +21,22 @@
 
 buildPythonPackage rec {
   pname = "pymodbus";
-  version = "3.9.0";
+  version = "3.9.1";
   pyproject = true;
 
-  disabled = pythonOlder "3.9";
-
   src = fetchFromGitHub {
     owner = "pymodbus-dev";
     repo = "pymodbus";
     tag = "v${version}";
-    hash = "sha256-8v48+wnxVBIXJhCn7/oHyoxPN8smWWNY/i5LMHhKUVk=";
+    hash = "sha256-O64r8/3AGZYr449FANo3wQCUiIJkIjN5eQ+VoTrvUHo=";
   };
 
   build-system = [ setuptools ];
 
   optional-dependencies = {
-    repl = [
-      aiohttp
-      typer
-      prompt-toolkit
-      pygments
-      click
-    ];
+    repl = [ pymodbus-repl ];
     serial = [ pyserial ];
+    simulator = [ aiohttp ];
   };
 
   nativeCheckInputs = [
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 157017e1e937..e3098c7fc424 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -12664,6 +12664,8 @@ self: super: with self; {
 
   pymodbus = callPackage ../development/python-modules/pymodbus { };
 
+  pymodbus-repl = callPackage ../development/python-modules/pymodbus-repl { };
+
   pymodes = callPackage ../development/python-modules/pymodes { };
 
   pymonctl = callPackage ../development/python-modules/pymonctl { };