Hello Not sure if this falls between a programming question or something else.
but i was wondering if it is possible to change ip address of the arduino through a webpage interface and have it store to maybe eeprom? Only way i can think of storing it is to the on board eeprom or some kind of flash chip.
everything i find is more about esp8266 or arduino yun. Can someone help me to figure this out? Thank you
Joseph
Hello can you please move this post to programming question i would like to update it.
Here is my problem. I need to do a network setup. Right now have a simple webserver with dhcp that picks up the address from the local router. But i can't take my laptop with me sometimes and i was wondering if there is a way to program it through the Web server web page?
my sketch below
#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
};
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
void setup() {
// 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
}
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
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.println("
");
}
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");
}
}
only thing i can think of is maybe store the ip address in EEPROM and have the sketch get the ip address from EEPROM. Not sure how would that work?
I did make some progress of uploading mac address and static ip information in eeprom.
First i used this sketch to manually add the information to eeprom
#include <EEPROM.h>
#include <SPI.h>
#include <Ethernet.h>
#include <NetEEPROM.h>
/* Stores network configuration of a MAC address and manual IP setup
* to EEPROM.
*/
void setup() {
byte mac[6] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
byte ip[4] = { 192, 168, 0, 191 };
byte dns[4] = { 8, 8, 8, 8 };
byte gw[4] = { 192, 168, 1, 1 };
byte subnet[4] = { 255, 255, 255, 0 };
NetEeprom.writeManualConfig(mac, ip, dns, gw, subnet);
}
void loop() {
}
then i took the read the eeprom and it did display all the information that was stored.
#include <EEPROM.h>
#include <SPI.h>
#include <Ethernet.h>
#include <NetEEPROM.h>
/* Prints the network configuration stored in EEPROM. */
void setup() {
Serial.begin(9600);
while (!Serial) {
// Wait for serial for Leonardo
}
if (NetEeprom.checkMagic()) {
byte mac[6];
NetEeprom.readMac(mac);
Serial.print("MAC: "); printMac(mac); Serial.println();
if (NetEeprom.isDhcp()) {
Serial.println("Network configured using DHCP");
} else {
byte addr[4];
NetEeprom.readIp(addr);
Serial.print("IP: "); printIp(addr); Serial.println();
NetEeprom.readDns(addr);
Serial.print("DNS: "); printIp(addr); Serial.println();
NetEeprom.readGateway(addr);
Serial.print("GW: "); printIp(addr); Serial.println();
NetEeprom.readSubnet(addr);
Serial.print("Subnet: "); printIp(addr); Serial.println();
}
} else {
Serial.println("Network MAC and IP have not been configured");
}
}
void loop() {
}
void printMac(byte mac[]) {
for (int i = 0; i < 6; i++) {
if (i > 0) {
Serial.print(":");
}
if (mac[i] < 0x10) {
Serial.print("0");
}
Serial.print(mac[i], HEX);
}
}
void printIp(byte ip[]) {
for (int i = 0; i < 4; i++) {
if (i > 0) {
Serial.print(".");
}
Serial.print(ip[i]);
}
}
then i put in part of the read sketch for only the ip address address to see if it will display.
/*
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 <EEPROM.h>
#include <SPI.h>
#include <Ethernet.h>
#include <NetEEPROM.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);
// Initialize the Ethernet server library
// with the IP address and port you want to use
// (port 80 is default for HTTP):
EthernetServer server(80);
void setup() {
// 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
}
// start the Ethernet connection and the server:
Ethernet.begin(mac, ip);
server.begin();
Serial.print("server is at ");
Serial.println(Ethernet.localIP());
byte addr[4];
NetEeprom.readIp(addr);
Serial.print("IP: "); printIp(addr); Serial.println();
}
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.println("
");
}
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");
}
}
void printMac(byte mac[]) {
for (int i = 0; i < 6; i++) {
if (i > 0) {
Serial.print(":");
}
if (mac[i] < 0x10) {
Serial.print("0");
}
Serial.print(mac[i], HEX);
}
}
void printIp(byte ip[]) {
for (int i = 0; i < 4; i++) {
if (i > 0) {
Serial.print(".");
}
Serial.print(ip[i]);
}
}
What I'm not sure is how put the Ip address from the eeprom into the Web server ip address. Can someone please help me with this?