The ESP32-S3-ETH is a powerful microcontroller module manufactured by WAVESHARE (Part ID: ESP32-S3-POE-ETH). It features integrated Wi-Fi and Bluetooth capabilities, along with Ethernet support for reliable wired connectivity. This module is designed for high-performance IoT applications, offering robust communication options and advanced processing power.

Powering the Module:

• Use PoE (Power over Ethernet) for a single-cable solution.
• Alternatively, supply 5V via the VIN pin or USB-C connector.

Connecting to Ethernet:

• Connect the Ethernet cable to the RJ45 port for wired communication.
• Ensure the Ethernet network supports 10/100 Mbps speeds.

Programming the Module:

• Use the USB-C port to connect the module to a computer.
• Install the ESP32-S3 board package in the Arduino IDE or ESP-IDF.
• Select the correct COM port and board type before uploading code.

Using GPIO Pins:

• Configure GPIO pins as input or output in your code.
• Use appropriate pull-up or pull-down resistors if required.

Wireless Communication:

• Configure Wi-Fi or Bluetooth settings in your code for wireless connectivity.
• Ensure proper security protocols (e.g., WPA2) are implemented for Wi-Fi.

• Power Supply: Ensure the module receives a stable 3.3V or 5V power supply.
• Ethernet Shielding: Use shielded Ethernet cables in noisy environments to reduce interference.
• GPIO Voltage Levels: Avoid applying voltages higher than 3.3V to GPIO pins to prevent damage.
• Firmware Updates: Regularly update the firmware to ensure compatibility and security.

Below is an example of how to use the ESP32-S3-ETH with the Arduino IDE to connect to an Ethernet network and send data to a server:

#include <ETH.h> // Include the Ethernet library for ESP32-S3

// Ethernet configuration
#define ETH_CLK_MODE ETH_CLOCK_GPIO17_OUT // Set clock mode
#define ETH_PHY_POWER 12                  // GPIO pin for PHY power

// Network credentials
const char* server = "example.com";       // Server address
const int port = 80;                      // Server port

void setup() {
  Serial.begin(115200);                   // Initialize serial communication
  ETH.begin(ETH_PHY_POWER, ETH_CLK_MODE); // Initialize Ethernet

  // Wait for Ethernet connection
  while (!ETH.linkUp()) {
    Serial.println("Connecting to Ethernet...");
    delay(1000);
  }
  Serial.println("Ethernet connected!");
}

void loop() {
  // Example: Send a GET request to the server
  WiFiClient client;
  if (client.connect(server, port)) {
    client.println("GET / HTTP/1.1");
    client.println("Host: example.com");
    client.println("Connection: close");
    client.println();
    Serial.println("Request sent!");
  } else {
    Serial.println("Connection failed!");
  }
  delay(10000); // Wait 10 seconds before sending the next request
}

Ethernet Not Connecting:

• Ensure the Ethernet cable is securely connected to the RJ45 port.
• Verify that the network supports 10/100 Mbps speeds.
• Check if the PoE switch or injector is functioning correctly.

Wi-Fi Not Connecting:

• Double-check the SSID and password in your code.
• Ensure the Wi-Fi network is within range and not overloaded.

Module Not Detected by Computer:

• Verify the USB-C cable is functional and supports data transfer.
• Install the correct USB drivers for the ESP32-S3.

GPIO Pins Not Working:

• Confirm the pin mode (input/output) is correctly set in the code.
• Check for short circuits or incorrect wiring.

Q: Can I use both Ethernet and Wi-Fi simultaneously?
A: Yes, the ESP32-S3-ETH supports simultaneous Ethernet and Wi-Fi operation.

Q: How do I update the firmware?
A: Use the ESP-IDF or Arduino IDE to upload the latest firmware via the USB-C port.

Q: What is the maximum Ethernet cable length?
A: The maximum recommended length is 100 meters (328 feet) for standard Ethernet cables.

Q: Can I power the module with a battery?
A: Yes, you can use a 3.7V LiPo battery with a suitable voltage regulator to provide 3.3V.