Hello everyone,
I am trying to make a simple webserver, based on the example form the standard Ethernet library, [https://www.arduino.cc/en/Tutorial/LibraryExamples/WebServer]. When accessing the web page on my laptop or smartphone on the same LAN network, everything works as expected. Then, I tried to make a port forward in my router, so I can access the webserver from devices outside my LAN network at home; using my WAN ip adress:port numer to connect to it. I can't get it to work, could someone help me?
I am using an Ethernet shield on an Arduino MEGA 2560. The Ethernet shield has an Wiznet W5100 chip on it and doesn't come with an MAC-address on the back.
I tried both ports 80 and 6476 for the port forward, neither does work. My internet service provender said that they do not block any of the ports.
I have used the following code:
/*
Web Server
A simple web server that shows the value of the analog input pins.
using an Arduino Wiznet Ethernet shield.
Circuit:
Ethernet shield attached to pins 10, 11, 12, 13
Analog inputs attached to pins A0 through A5 (optional)
created 18 Dec 2009
by David A. Mellis
modified 9 Apr 2012
by Tom Igoe
modified 02 Sept 2015
by Arturo Guadalupi
*/
#include <SPI.h>
#include <Ethernet.h>
// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
// IPAddress ip(192, 168, 1, 177);
IPAddress ip(192, 168, 18, 9);
IPAddress gateway (192, 168, 18, 1);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
//EthernetServer server(80);
EthernetServer server(6476);
int SPIpinSS = 53;
int SDcardPinSS = 4;
void setup() {
// Set pins 53 and 4 to OUTPUT mode and make them HIGH.
pinMode(SPIpinSS, OUTPUT);
pinMode(SDcardPinSS, OUTPUT);
digitalWrite(SPIpinSS, HIGH);
digitalWrite(SDcardPinSS, HIGH);
// You can use Ethernet.init(pin) to configure the CS pin
Ethernet.init(10); // Most Arduino shields
//Ethernet.init(5); // MKR ETH shield
//Ethernet.init(0); // Teensy 2.0
//Ethernet.init(20); // Teensy++ 2.0
//Ethernet.init(15); // ESP8266 with Adafruit Featherwing Ethernet
//Ethernet.init(33); // ESP32 with Adafruit Featherwing Ethernet
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB port only
}
Serial.println("Ethernet WebServer Example");
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
// Check for Ethernet hardware present
if (Ethernet.hardwareStatus() == EthernetNoHardware) {
Serial.println("Ethernet shield was not found. Sorry, can't run without hardware. :(");
while (true) {
delay(1); // do nothing, no point running without Ethernet hardware
}
}
if (Ethernet.linkStatus() == LinkOFF) {
Serial.println("Ethernet cable is not connected.");
}
// start the server
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
}
void loop() {
// listen for incoming clients
EthernetClient client = server.available();
if (client) {
Serial.println("new client");
// an http request ends with a blank line
boolean currentLineIsBlank = true;
while (client.connected()) {
if (client.available()) {
char c = client.read();
Serial.write(c);
// if you've gotten to the end of the line (received a newline
// character) and the line is blank, the http request has ended,
// so you can send a reply
if (c == '\n' && currentLineIsBlank) {
// send a standard http response header
client.println("HTTP/1.1 200 OK");
client.println("Content-Type: text/html");
client.println("Connection: close"); // the connection will be closed after completion of the response
client.println("Refresh: 5"); // refresh the page automatically every 5 sec
client.println();
client.println("<!DOCTYPE HTML>");
client.println("<html>");
// output the value of each analog input pin
for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
int sensorReading = analogRead(analogChannel);
client.print("analog input ");
client.print(analogChannel);
client.print(" is ");
client.print(sensorReading);
client.print(", which is ");
client.print(sensorReading * (5.0 / 1023.0) );
client.println(" V.<br />");
client.println("<br />");
}
client.println("</html>");
break;
}
if (c == '\n') {
// you're starting a new line
currentLineIsBlank = true;
} else if (c != '\r') {
// you've gotten a character on the current line
currentLineIsBlank = false;
}
}
}
// give the web browser time to receive the data
delay(1);
// close the connection:
client.stop();
Serial.println("client disconnected");
}
}
I have created an static LAN IP-address for the Arduino Shield, set to the same IP-address as used in the sketch, so I am sure the IP-address can't be given to another device.
I hope someone can help me.
