ESP32 Ethernet Devboard

ESP32 Ethernet Development Module is a development board designed for industrial IoT projects, supporting Wi‑Fi, Ethernet and Bluetooth connectivity. With its built-in LAN8720-based Ethernet PHY interface, it provides wired network connection directly via RJ45 port. It can be programmed over USB Type‑C and easily used with Arduino IDE or PlatformIO.

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Use Cases

IoT devices
Industrial data acquisition systems
Smart building automation
Ethernet-based sensor networks
Control systems with web server
IP-based access control devices (e.g. RFID + Ethernet)

Technical Specifications

Microcontroller: ESP32-WROOM-32D
Core: Dual-core (up to 240 MHz)
RAM: 520 KB
Flash: 4 MB (SPI Flash)
Connectivity: Wi-Fi 2.4GHz 802.11 b/g/n / 10/100 Mbps Ethernet (LAN8720 PHY) / Bluetooth 4.2 BR/EDR + BLE
Programming Interface: USB Type-C
Power Supply: 5V (USB Type-C or 5V pin)
GPIO Pins: Access to all standard ESP32 pins

Programming and Usage

It can be programmed directly over USB Type-C using Arduino IDE or PlatformIO.

It is compatible with the common Ethernet, Wi-Fi, Bluetooth, MQTT and TCP/IP libraries in the ESP32 ecosystem.

Sample Code

#include <Arduino.h>
#include <ETH.h>
#include <HTTPClient.h>

#define ETH_ADDR 1
#define ETH_POWER_PIN -1
#define ETH_MDC_PIN 23
#define ETH_MDIO_PIN 18
#define ETH_TYPE ETH_PHY_LAN8720
#define ETH_CLK_MODE ETH_CLOCK_GPIO17_OUT

const char* GOOGLE_CHECK_URL = "http://clients3.google.com/generate_204";
const unsigned long INTERVAL_MS = 10000;

bool ethReady = false;
HTTPClient http;
unsigned long lastMillis = 0;

void WiFiEvent(WiFiEvent_t event) {
  switch (event) {
    case ARDUINO_EVENT_ETH_START:
      Serial.println("ETH başlatıldı");
      ETH.setHostname("esp32-ethernet");
      break;
    case ARDUINO_EVENT_ETH_CONNECTED:
      Serial.println("ETH bağlandı");
      break;
    case ARDUINO_EVENT_ETH_GOT_IP:
      Serial.print("IP: ");
      Serial.println(ETH.localIP());
      ethReady = true;
      break;
    case ARDUINO_EVENT_ETH_DISCONNECTED:
    case ARDUINO_EVENT_ETH_STOP:
      Serial.println("ETH bağlantısı kesildi");
      ethReady = false;
      break;
    default:
      break;
  }
}

void setup() {
  Serial.begin(115200);
  WiFi.onEvent(WiFiEvent);
  ETH.begin(ETH_ADDR, ETH_POWER_PIN, ETH_MDC_PIN, ETH_MDIO_PIN, ETH_TYPE, ETH_CLK_MODE);
}

void loop() {
  if (ethReady && millis() - lastMillis >= INTERVAL_MS) {
    lastMillis = millis();
    http.begin(GOOGLE_CHECK_URL);
    int code = http.GET();
    Serial.printf("HTTP Code: %d\n", code);
    http.end();
  }
}

Licensing

ESP32 Ethernet Devboard has been developed by İLİMERA TECHNOLOGY.