Ethernet Server

This library allows users to connect via Ethernet as a server. The following sample is based on the mbed library. You can build it using the web compiler.

Sample Program

Sample for the Ethernet server library. The server backs echo.

#include <Arduino.h>
#include <EthernetInterface.h>
#include <stdio.h>
#include <string.h>
EthernetInterface eth;
TCPSocketServer svr;
bool serverIsListened = false;
TCPSocketConnection client;
bool clientIsConnected = false;
void setup (void)
    pinMode(PIN_LED_BLUE, OUTPUT);
    pinMode(PIN_LED_RED, OUTPUT);
    digitalWrite(PIN_LED_BLUE, LOW);
    digitalWrite(PIN_LED_RED, LOW);
    //setup ethernet interface
    printf("Start to connect..\n\r");
    eth.init(); //Use DHCP
    printf("IP Address is %s\n\r", eth.getIPAddress());
    //setup tcp socket
    if(svr.bind(80)< 0) {
        printf("tcp server bind failed.\n\r");
        return ;
    } else {
        printf("tcp server bind successed.\n\r");
        serverIsListened = true;
    if(svr.listen(1) < 0) {
        printf("tcp server listen failed.\n\r");
        return ;
    } else {
        printf("tcp server is listening...\n\r");
    //listening for http GET request
    while (serverIsListened) {
        //blocking mode(never timeout)
        if(svr.accept(client)<0) {
            printf("failed to accept connection.\n\r");
        } else {
            printf("connection success!\n\rIP: %s\n\r",client.get_address());
            clientIsConnected = true;
            digitalWrite(PIN_LED_BLUE, HIGH);
            while(clientIsConnected) {
                char buffer[1024] = {};
                switch(client.receive(buffer, 1023)) {
                    case 0:
                        printf("recieved buffer is empty.\n\r");
                        clientIsConnected = false;
                    case -1:
                        printf("failed to read data from client.\n\r");
                        clientIsConnected = false;
                        printf("Recieved Data: %d\n\r\n\r%.*s\n\r",strlen(buffer),strlen(buffer),buffer);
                        if(buffer[0] == 'G' && buffer[1] == 'E' && buffer[2] == 'T' ) {
                            printf("GET request incomming.\n\r");
                            //setup http response header & data
                            char echoHeader[256] = {};
                            sprintf(echoHeader,"HTTP/1.1 200 OK\n\rContent-Length: %d\n\rContent-Type: text\n\rConnection: Close\n\r\n\r",strlen(buffer));
                            clientIsConnected = false;
                            printf("echo back done.\n\r");
            printf("close connection.\n\rtcp server is listening...\n\r");
            digitalWrite(PIN_LED_BLUE, LOW);
void loop(){