diff --git a/modules/libmodbus/3.1.10/MODULE.bazel b/modules/libmodbus/3.1.10/MODULE.bazel
new file mode 100644
index 00000000000..1b6b6e907e1
--- /dev/null
+++ b/modules/libmodbus/3.1.10/MODULE.bazel
@@ -0,0 +1,6 @@
+module(
+    name = "libmodbus",
+    version = "3.1.10",
+    compatibility_level = 1,
+)
+bazel_dep(name = "bazel_skylib", version = "1.7.1")
diff --git a/modules/libmodbus/3.1.10/patches/add_build_file.patch b/modules/libmodbus/3.1.10/patches/add_build_file.patch
new file mode 100644
index 00000000000..754ad379968
--- /dev/null
+++ b/modules/libmodbus/3.1.10/patches/add_build_file.patch
@@ -0,0 +1,66 @@
+diff --git a/BUILD b/BUILD
+new file mode 100644
+index 0000000..315d32e
+--- /dev/null
++++ b/BUILD
+@@ -0,0 +1,60 @@
++load("@bazel_skylib//rules:expand_template.bzl", "expand_template")
++
++cc_library(
++    name = "modbus",
++    srcs = glob(["src/*.c"]) + [
++        ":generate_config_h",
++        ":generate_modbus_version_h",
++    ],
++    hdrs = glob(["src/*.h"]),
++    copts = ["-DHAVE_CONFIG_H"],
++    includes = ["src"],
++    include_prefix = "libmodbus",
++    visibility = ["//visibility:public"],
++)
++
++alias(
++    name = "libmodbus",
++    actual = ":modbus",
++)
++
++cc_shared_library(
++    name = "modbus_shared",
++    additional_linker_inputs = [
++        ":modbus-versionscript.lds",
++    ],
++    user_link_flags = [
++        # Linker script to hide non-modbus symbols.
++        "-Wl,--version-script",
++        "$(location modbus-versionscript.lds)",
++    ],
++    visibility = ["//visibility:public"],
++    deps = [
++        ":modbus",
++    ],
++)
++
++expand_template(
++    name = "generate_modbus_version_h",
++    out = "src/modbus-version.h",
++    substitutions = {
++        "@LIBMODBUS_VERSION_MAJOR@": "3",
++        "@LIBMODBUS_VERSION_MINOR@": "1",
++        "@LIBMODBUS_VERSION_MICRO@": "10",
++        "@LIBMODBUS_VERSION@": "3.1.10",
++    },
++    template = "src/modbus-version.h.in",
++)
++
++genrule(
++    name = "generate_config_h",
++    outs = ["src/config.h"],
++    cmd = """cat > $@ <<EOF
++#define HAVE_DECL_TIOCM_RTS 1
++#define HAVE_DECL_TIOCSRS485 1
++#undef HAVE_ACCEPT4
++#undef HAVE_GAI_STRERROR
++#define HAVE_NETINET_IN_H 1
++#define HAVE_NETINET_IP_H 1
++""",
++)
diff --git a/modules/libmodbus/3.1.10/patches/add_modbus_versionscript_dot_lds.patch b/modules/libmodbus/3.1.10/patches/add_modbus_versionscript_dot_lds.patch
new file mode 100644
index 00000000000..dbdde678bb6
--- /dev/null
+++ b/modules/libmodbus/3.1.10/patches/add_modbus_versionscript_dot_lds.patch
@@ -0,0 +1,11 @@
+diff --git a/modbus-versionscript.lds b/modbus-versionscript.lds
+new file mode 100644
+index 0000000..ea4858f
+--- /dev/null
++++ b/modbus-versionscript.lds
+@@ -0,0 +1,5 @@
++{
++  global:
++    modbus_*;
++  local: *;
++};
diff --git a/modules/libmodbus/3.1.10/patches/module_dot_bazel.patch b/modules/libmodbus/3.1.10/patches/module_dot_bazel.patch
new file mode 100644
index 00000000000..acde8731d91
--- /dev/null
+++ b/modules/libmodbus/3.1.10/patches/module_dot_bazel.patch
@@ -0,0 +1,9 @@
+--- a/MODULE.bazel
++++ a/MODULE.bazel
+@@ -0,0 +1,6 @@
++module(
++    name = "libmodbus",
++    version = "3.1.10",
++    compatibility_level = 1,
++)
++bazel_dep(name = "bazel_skylib", version = "1.7.1")
diff --git a/modules/libmodbus/3.1.10/presubmit.yml b/modules/libmodbus/3.1.10/presubmit.yml
new file mode 100644
index 00000000000..8d8013a8821
--- /dev/null
+++ b/modules/libmodbus/3.1.10/presubmit.yml
@@ -0,0 +1,15 @@
+matrix:
+  platform:
+  - debian10
+  - ubuntu2004
+  bazel:
+  - 8.x
+  - 7.x
+tasks:
+  verify_targets:
+    name: Verify build targets
+    platform: ${{ platform }}
+    bazel: ${{ bazel }}
+    build_targets:
+    - '@libmodbus//:modbus'
+    - '@libmodbus//:modbus_shared'
diff --git a/modules/libmodbus/3.1.10/source.json b/modules/libmodbus/3.1.10/source.json
new file mode 100644
index 00000000000..6d2f56b13e7
--- /dev/null
+++ b/modules/libmodbus/3.1.10/source.json
@@ -0,0 +1,11 @@
+{
+    "url": "https://github.com/stephane/libmodbus/releases/download/v3.1.10/libmodbus-3.1.10.tar.gz",
+    "integrity": "sha256-iZvk4lq3/leZ1D+VZ1ENbwY9Lo9WE23XJrb9l2+bIlM=",
+    "strip_prefix": "libmodbus-3.1.10",
+    "patches": {
+        "add_modbus_versionscript_dot_lds.patch": "sha256-O5Luywpd7kYnst/RMovKqi+ze1AGg/VCyFC7RN8HCvY=",
+        "add_build_file.patch": "sha256-QJ61k+ie5LxcJ2ouQYRW2LDK2HaxFmEi94r5beBitFQ=",
+        "module_dot_bazel.patch": "sha256-j4xOkLqnL9gHf0SvX4Z+OPIvh+Wywv1QNR0yK2xXkmw="
+    },
+    "patch_strip": 1
+}
diff --git a/modules/libmodbus/metadata.json b/modules/libmodbus/metadata.json
new file mode 100644
index 00000000000..da626ba3f4d
--- /dev/null
+++ b/modules/libmodbus/metadata.json
@@ -0,0 +1,22 @@
+{
+    "homepage": "www.libmodbus.org",
+    "maintainers": [
+        {
+            "email": "beardsworth@intrinsic.ai",
+            "github": "mbeards",
+            "name": "Michael Beardsworth"
+        },
+        {
+            "email": "jimjing@intrinsic.ai",
+            "github": "jimjing",
+            "name": "Jim Jing"
+        }
+    ],
+    "repository": [
+        "github:stephane/libmodbus"
+    ],
+    "versions": [
+        "3.1.10"
+    ],
+    "yanked_versions": {}
+}