20.13. lwip_tcpclient_freertos_socket

20.13.1. Overview

This example shows the usage of TCP client on FreeRTOS.

  • MCU as TCP client sends data frame periodically to a TCP server.

20.13.2. Board Settings

  • Connect a USB port on PC to the PWR DEBUG port on the development board with a USB Type-C cable

  • Connect an Ethernet port on PC to a RGMII port or a RMII port on the development board with an Ethernet cable

20.13.3. Project Configurations

  • Ethernet Port Settings: Refer to Ethernet common project settings

  • Ethernet DHCP Configurations

    • the configurations in the CMakeLists.txt as follows:

      • sdk_compile_definitions(-DLWIP_DHCP=0): Disable DHCP feature

      • sdk_compile_definitions(-DLWIP_DHCP=1): Enable DHCP feature

20.13.4. Run Example

  • Compiling and Downloading

  • Running log is shown in the serial terminal as follows:

    This is an ethernet demo: TCP Client With Socket API On FreeRTOS
LwIP Version: 2.1.2
Enet phy init passed !
Link Status: Up
Link Speed:  1000Mbps
Link Duplex: Full duplex
IPv4 Address: 192.168.100.10
IPv4 Netmask: 255.255.255.0
IPv4 Gateway: 192.168.100.1
Connect to server successfully!

  • Run an Ethernet debugging tool

    • Create and set a TCP server: TCP Server IP: 192.168.100.5/Port: 5001

    • Open

    • Watch the data frame in the receive window

      ../../../_images/lwip_tcpclient.png