diff --git a/.gitmodules b/.gitmodules
index 423d1bbeed8fb..e6712c1f9f40e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -65,3 +65,6 @@
 [submodule "lib/libmetal"]
 	path = lib/libmetal
 	url = https://github.com/OpenAMP/libmetal.git
+[submodule "lib/arduino-lib"]
+	path = lib/arduino-lib
+	url = https://github.com/arduino/arduino-lib-mpy.git
diff --git a/lib/arduino-lib b/lib/arduino-lib
new file mode 160000
index 0000000000000..277efd50fcc63
--- /dev/null
+++ b/lib/arduino-lib
@@ -0,0 +1 @@
+Subproject commit 277efd50fcc637e2e2e87c9aa50c06acc9080970
diff --git a/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/manifest.py b/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/manifest.py
index b3c6b02e5ba07..7b35b54c7a90b 100644
--- a/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/manifest.py
+++ b/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/manifest.py
@@ -10,3 +10,9 @@
 
 # Bluetooth
 require("aioble")
+
+# Register external library
+add_library("arduino-lib", "$(ARDUINO_LIB_DIR)")
+
+# CMWX1 Lora module.
+require("cmwx1", library="arduino-lib")
diff --git a/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/mpconfigboard.mk b/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/mpconfigboard.mk
index de9902c16cf7f..9bb336d65e9d5 100644
--- a/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/mpconfigboard.mk
+++ b/ports/renesas-ra/boards/ARDUINO_PORTENTA_C33/mpconfigboard.mk
@@ -18,5 +18,8 @@ MICROPY_SSL_MBEDTLS = 1
 MICROPY_PY_NETWORK = 1
 MICROPY_PY_NETWORK_ESP_HOSTED = 1
 
+ARDUINO_LIB_DIR = lib/arduino-lib
+GIT_SUBMODULES += $(ARDUINO_LIB_DIR)
 FROZEN_MANIFEST = $(BOARD_DIR)/manifest.py
+MICROPY_MANIFEST_ARDUINO_LIB_DIR = $(TOP)/$(ARDUINO_LIB_DIR)
 MBEDTLS_CONFIG_FILE = '"$(BOARD_DIR)/mbedtls_config_board.h"'
diff --git a/ports/stm32/boards/ARDUINO_GIGA/manifest.py b/ports/stm32/boards/ARDUINO_GIGA/manifest.py
index b3c6b02e5ba07..b7b9a2b470d02 100644
--- a/ports/stm32/boards/ARDUINO_GIGA/manifest.py
+++ b/ports/stm32/boards/ARDUINO_GIGA/manifest.py
@@ -10,3 +10,9 @@
 
 # Bluetooth
 require("aioble")
+
+# Register external library
+add_library("arduino-lib", "$(ARDUINO_LIB_DIR)")
+
+# RPC
+require("msgpackrpc", library="arduino-lib")
diff --git a/ports/stm32/boards/ARDUINO_GIGA/mpconfigboard.mk b/ports/stm32/boards/ARDUINO_GIGA/mpconfigboard.mk
index 46fe40c2a6a82..f58c98af83cfd 100644
--- a/ports/stm32/boards/ARDUINO_GIGA/mpconfigboard.mk
+++ b/ports/stm32/boards/ARDUINO_GIGA/mpconfigboard.mk
@@ -26,5 +26,8 @@ MICROPY_SSL_MBEDTLS = 1
 MICROPY_PY_OPENAMP = 1
 MICROPY_PY_OPENAMP_REMOTEPROC = 1
 
+ARDUINO_LIB_DIR = lib/arduino-lib
+GIT_SUBMODULES += $(ARDUINO_LIB_DIR)
 FROZEN_MANIFEST = $(BOARD_DIR)/manifest.py
+MICROPY_MANIFEST_ARDUINO_LIB_DIR = $(TOP)/$(ARDUINO_LIB_DIR)
 MBEDTLS_CONFIG_FILE = '"$(BOARD_DIR)/mbedtls_config_board.h"'
diff --git a/ports/stm32/boards/ARDUINO_NICLA_VISION/manifest.py b/ports/stm32/boards/ARDUINO_NICLA_VISION/manifest.py
index b3c6b02e5ba07..b7b9a2b470d02 100644
--- a/ports/stm32/boards/ARDUINO_NICLA_VISION/manifest.py
+++ b/ports/stm32/boards/ARDUINO_NICLA_VISION/manifest.py
@@ -10,3 +10,9 @@
 
 # Bluetooth
 require("aioble")
+
+# Register external library
+add_library("arduino-lib", "$(ARDUINO_LIB_DIR)")
+
+# RPC
+require("msgpackrpc", library="arduino-lib")
diff --git a/ports/stm32/boards/ARDUINO_NICLA_VISION/mpconfigboard.mk b/ports/stm32/boards/ARDUINO_NICLA_VISION/mpconfigboard.mk
index 77d547bce05e9..0e8ff0e82d388 100644
--- a/ports/stm32/boards/ARDUINO_NICLA_VISION/mpconfigboard.mk
+++ b/ports/stm32/boards/ARDUINO_NICLA_VISION/mpconfigboard.mk
@@ -26,5 +26,8 @@ MICROPY_SSL_MBEDTLS = 1
 MICROPY_PY_OPENAMP = 1
 MICROPY_PY_OPENAMP_REMOTEPROC = 1
 
+ARDUINO_LIB_DIR = lib/arduino-lib
+GIT_SUBMODULES += $(ARDUINO_LIB_DIR)
 FROZEN_MANIFEST = $(BOARD_DIR)/manifest.py
+MICROPY_MANIFEST_ARDUINO_LIB_DIR = $(TOP)/$(ARDUINO_LIB_DIR)
 MBEDTLS_CONFIG_FILE = '"$(BOARD_DIR)/mbedtls_config_board.h"'
diff --git a/ports/stm32/boards/ARDUINO_PORTENTA_H7/manifest.py b/ports/stm32/boards/ARDUINO_PORTENTA_H7/manifest.py
index b3c6b02e5ba07..eb53df0fbdeb2 100644
--- a/ports/stm32/boards/ARDUINO_PORTENTA_H7/manifest.py
+++ b/ports/stm32/boards/ARDUINO_PORTENTA_H7/manifest.py
@@ -10,3 +10,10 @@
 
 # Bluetooth
 require("aioble")
+
+# Register external library
+add_library("arduino-lib", "$(ARDUINO_LIB_DIR)")
+
+# RPC
+require("cmwx1", library="arduino-lib")
+require("msgpackrpc", library="arduino-lib")
diff --git a/ports/stm32/boards/ARDUINO_PORTENTA_H7/mpconfigboard.mk b/ports/stm32/boards/ARDUINO_PORTENTA_H7/mpconfigboard.mk
index c56c8f005f72b..3b173b3acdb92 100644
--- a/ports/stm32/boards/ARDUINO_PORTENTA_H7/mpconfigboard.mk
+++ b/ports/stm32/boards/ARDUINO_PORTENTA_H7/mpconfigboard.mk
@@ -26,5 +26,8 @@ MICROPY_SSL_MBEDTLS = 1
 MICROPY_PY_OPENAMP = 1
 MICROPY_PY_OPENAMP_REMOTEPROC = 1
 
+ARDUINO_LIB_DIR = lib/arduino-lib
+GIT_SUBMODULES += $(ARDUINO_LIB_DIR)
 FROZEN_MANIFEST = $(BOARD_DIR)/manifest.py
+MICROPY_MANIFEST_ARDUINO_LIB_DIR = $(TOP)/$(ARDUINO_LIB_DIR)
 MBEDTLS_CONFIG_FILE = '"$(BOARD_DIR)/mbedtls_config_board.h"'

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