Code:
/*
* Made by KinCony IoT: https://www.kincony.com
*
* This Arduino program sets up an ESP32-S3 with a W5500 Ethernet module
* as a TCP server. It listens on port 4196 and echoes back any string
* received from a client.
*
* Hardware connections:
* - CLK: GPIO42
* - MOSI: GPIO43
* - MISO: GPIO44
* - CS: GPIO41
* - RST: GPIO1
* - INT: GPIO2
*
* Static IP address: 192.168.3.55
* Subnet Mask: 255.255.255.0
* Gateway: 192.168.3.1
* DNS: 192.168.3.1
*/
#include <SPI.h>
#include <Ethernet.h>
// Define the W5500 Ethernet module pins
#define W5500_CS_PIN 41
#define W5500_RST_PIN 1
#define W5500_INT_PIN 2
#define W5500_CLK_PIN 42
#define W5500_MOSI_PIN 43
#define W5500_MISO_PIN 44
// MAC address for your Ethernet shield (must be unique on your network)
byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
// Static IP address configuration
IPAddress ip(192, 168, 3, 55); // Static IP address
IPAddress subnet(255, 255, 255, 0); // Subnet mask
IPAddress gateway(192, 168, 3, 1); // Default gateway
IPAddress dns(192, 168, 3, 1); // DNS server address
// Create an EthernetServer object to handle TCP connections
EthernetServer server(4196);
void setup() {
// Initialize serial communication
Serial.begin(115200);
while (!Serial) {
; // Wait for serial port to connect
}
// Initialize the W5500 module
pinMode(W5500_RST_PIN, OUTPUT);
pinMode(W5500_INT_PIN, INPUT);
digitalWrite(W5500_RST_PIN, LOW); // Reset the W5500 module
delay(100); // Wait for reset to complete
digitalWrite(W5500_RST_PIN, HIGH); // Release reset
// Initialize SPI with the correct pin definitions
SPI.begin(W5500_CLK_PIN, W5500_MISO_PIN, W5500_MOSI_PIN);
// Set up the Ethernet library with W5500-specific pins
Ethernet.init(W5500_CS_PIN);
// Start the Ethernet connection with static IP configuration
Ethernet.begin(mac, ip, dns, gateway, subnet);
// Print the IP address to the serial monitor
Serial.print("IP Address: ");
Serial.println(Ethernet.localIP());
// Start listening for incoming TCP connections
server.begin();
}
void loop() {
// Check for incoming client connections
EthernetClient client = server.available();
if (client) {
Serial.println("New client connected");
// Read data from the client and echo it back
while (client.connected()) {
if (client.available()) {
char c = client.read();
server.write(c);
}
}
// Close the connection when done
client.stop();
Serial.println("Client disconnected");
}
}
