TCP client example

This example provides a basic implementation of TCP client for ESP32 with drivers from this repository

About the example

TCP client is designed to periodically transmit to the server, and accept responses, which are printed to the console.

Configuring the example

Configure the example using idf.py menuconfig, according to your setup, provide settings for Ethernet initialization. Next, go to Example options and set the Server IP address.

Determining the server IP address

If you are running a TCP server on your PC using tcp_server.py - run a command to see your IP:

Windows - ipconfig /all
macOS/Linux - ifconfig

If you are running a TCP server on another ESP32 along with a DHCP server - see the output of your server for lines such as:

Plaintext

I (6349) tcp_server: --------
I (6359) tcp_server: Network Interface 0: 192.168.0.1
I (6359) tcp_server: Network Interface 1: 192.168.1.1
I (6369) tcp_server: --------

It will list all your network interfaces and the IP address assigned to it. Depending on the interface you are connected to - set the Server IP address accordingly.

Running the example

After you obtain an IP address you will see a message reading TCP client is started, waiting for the server to accept a connection.

If you are connecting the device to a PC - start the server with tcp_server.py. The command to do so is tcp_server.py IP to start listening on the specified IP address.

Important: use the IP address of your PC in the local network to which ESP32 is connected. It must match the IP address you've set in the Example options.

You will see incoming messages in the ESP32 console or as an output of tcp_server.py if you are connecting the ESP32 to your PC and running a TCP server using a script.