diff --git a/Documentation/platforms/arm/stm32h7/boards/linum-stm32h753bi/index.rst b/Documentation/platforms/arm/stm32h7/boards/linum-stm32h753bi/index.rst
index c9ad293b7ef..48a63d3c2fc 100644
--- a/Documentation/platforms/arm/stm32h7/boards/linum-stm32h753bi/index.rst
+++ b/Documentation/platforms/arm/stm32h7/boards/linum-stm32h753bi/index.rst
@@ -393,3 +393,18 @@ can enable the ModBus to respond to queries::
 In your pc you will be able to read the ModBus registers using an application like ``mbpoll``::
 
     $ mbpoll -a 10 -b 38400 -t 3 -r 1000 -c 4 /dev/ttyUSB1 -R
+
+modbus_master
+-------------
+
+Configures the ModBus RTU Master located at apps/examples/modbusmaster. This
+configuration enables a RS485 on USART6.
+
+After configuring the desired pins on menuconfig and wiring the RS485 converter, you
+can enable the ModBus Master to create queries for device with address 10::
+
+    nsh> mbmaster
+
+In your pc you will be able to create a ModBus Slave with address 10 using an application like ``diagslave``::
+
+    $ sudo diagslave -a 10 -b 38400 /dev/ttyUSB0
diff --git a/boards/arm/stm32h7/linum-stm32h753bi/configs/modbus_master/defconfig b/boards/arm/stm32h7/linum-stm32h753bi/configs/modbus_master/defconfig
new file mode 100644
index 00000000000..058d12e7b47
--- /dev/null
+++ b/boards/arm/stm32h7/linum-stm32h753bi/configs/modbus_master/defconfig
@@ -0,0 +1,79 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+# CONFIG_MB_MASTER_FUNC_READWRITE_HOLDING_ENABLED is not set
+# CONFIG_MB_MASTER_FUNC_READ_COILS_ENABLED is not set
+# CONFIG_MB_MASTER_FUNC_READ_DISCRETE_INPUTS_ENABLED is not set
+# CONFIG_MB_MASTER_FUNC_READ_INPUT_ENABLED is not set
+# CONFIG_MB_MASTER_FUNC_WRITE_COIL_ENABLED is not set
+# CONFIG_MB_MASTER_FUNC_WRITE_HOLDING_ENABLED is not set
+# CONFIG_MB_MASTER_FUNC_WRITE_MULTIPLE_COILS_ENABLED is not set
+# CONFIG_MB_MASTER_FUNC_WRITE_MULTIPLE_HOLDING_ENABLED is not set
+# CONFIG_NSH_DISABLE_IFCONFIG is not set
+# CONFIG_NSH_DISABLE_PS is not set
+# CONFIG_STANDARD_SERIAL is not set
+# CONFIG_STM32H7_USE_LEGACY_PINMAP is not set
+CONFIG_ARCH="arm"
+CONFIG_ARCH_BOARD="linum-stm32h753bi"
+CONFIG_ARCH_BOARD_LINUM_STM32H753BI=y
+CONFIG_ARCH_CHIP="stm32h7"
+CONFIG_ARCH_CHIP_STM32H753BI=y
+CONFIG_ARCH_CHIP_STM32H7=y
+CONFIG_ARCH_CHIP_STM32H7_CORTEXM7=y
+CONFIG_ARCH_STACKDUMP=y
+CONFIG_ARMV7M_DCACHE=y
+CONFIG_ARMV7M_DCACHE_WRITETHROUGH=y
+CONFIG_ARMV7M_DTCM=y
+CONFIG_ARMV7M_ICACHE=y
+CONFIG_BOARD_LOOPSPERMSEC=43103
+CONFIG_BUILTIN=y
+CONFIG_DEBUG_FEATURES=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_EXAMPLES_ALARM=y
+CONFIG_EXAMPLES_MODBUSMASTER=y
+CONFIG_EXAMPLES_MODBUSMASTER_PORT=2
+CONFIG_EXAMPLES_MODBUSMASTER_PROGNAME="mbmaster"
+CONFIG_EXAMPLES_MODBUSMASTER_SLAVEADDR=10
+CONFIG_INIT_ENTRYPOINT="nsh_main"
+CONFIG_INTELHEX_BINARY=y
+CONFIG_LIBM=y
+CONFIG_MB_PORT_HAS_CLOSE=y
+CONFIG_MB_RTU_MASTER=y
+CONFIG_MM_REGIONS=4
+CONFIG_MODBUS=y
+CONFIG_MODBUS_MASTER=y
+CONFIG_NSH_ARCHINIT=y
+CONFIG_NSH_BUILTIN_APPS=y
+CONFIG_NSH_FILEIOSIZE=512
+CONFIG_NSH_LINELEN=64
+CONFIG_NSH_READLINE=y
+CONFIG_PREALLOC_TIMERS=4
+CONFIG_RAM_SIZE=245760
+CONFIG_RAM_START=0x20010000
+CONFIG_RAW_BINARY=y
+CONFIG_RR_INTERVAL=200
+CONFIG_RTC_ALARM=y
+CONFIG_RTC_DATETIME=y
+CONFIG_RTC_DRIVER=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=6
+CONFIG_START_MONTH=12
+CONFIG_START_YEAR=2011
+CONFIG_STM32H7_PWR=y
+CONFIG_STM32H7_RTC=y
+CONFIG_STM32H7_UART4=y
+CONFIG_STM32H7_USART1=y
+CONFIG_STM32H7_USART6=y
+CONFIG_SYSTEM_NSH=y
+CONFIG_TASK_NAME_SIZE=0
+CONFIG_UART4_BAUD=38400
+CONFIG_UART4_PARITY=2
+CONFIG_UART4_RS485=y
+CONFIG_USART1_SERIAL_CONSOLE=y
+CONFIG_USART6_BAUD=38400
+CONFIG_USART6_PARITY=2
+CONFIG_USART6_RS485=y