Hi all,
I've just released my first Arduino project.
It's a code that check my emails each 10 secondes and switch a LED on when unread mails are available.
There is also a post on my site but i can't post a link since it's my first post on Arduino forum.
and here is the full code (don't forget to enter your name and password and also to change the IP settings both of the board and the server).
/*****************************************************/
// Email Checker
// Designer : Arturo Erbsman
// Programmer : Antoine Villeret
// ENSADLab - 2010
/*****************************************************/
#include <Ethernet.h>
#define LEDPIN 9 // LED connected to this pin
#define TTL 10000 // time to live : time before a command is considered to be lost
byte mac[] = {0x00, 0x1C, 0xC0, 0x5D, 0x5C, 0x26};
// IP settings
byte ip[] = {
172, 30, 34, 138 };
byte gateway[] = {
172, 30, 34, 254 };
byte subnet[] = {
255, 255, 255, 0 };
byte webmail[] = {212, 27, 48, 2}; // imap.free.fr
char user[] = "yourname"; // your user name
char pass[]="yourpass"; // your password
int i,length,command_id;
unsigned long time,iteration;
boolean message_flag;
char c;
char matchseq[] = "UNSEEN"; // char seq that indicates new messages
int matchseqlength;
Client client(webmail, 143);
int asknwait(int count, char* command, ...) // this function sends the command in char command to the server and waits for an answer
{
command_id++;
Serial.print("\nC:a");
Serial.print(command_id);
Serial.print(" ");
client.print("a");
client.print(command_id);
client.print(" ");
// handles severals char arg
va_list l_Arg;
va_start(l_Arg, count);
while( count ) {
Serial.print(command);
client.print(command);
count--;
command = va_arg(l_Arg, char*);
}
va_end(l_Arg);
Serial.println();
client.println();
time = millis()+TTL;
Serial.println("Wait... ");
while(!client.available()){ // waiting for an answer from the server
if (time < millis())
{
Serial.print("Time out. Close the connection.");
client.stop();
Serial.println(" Reset the connection");
return -1;
}
}
return 0;
}
void setup()
{
Serial.begin(9600);
// global variable initialization
iteration = 0;
c=0,i=0;
int j,k;
pinMode(LEDPIN,OUTPUT);
matchseqlength = sizeof(matchseq)/sizeof(char)-1;
}
void loop()
{
command_id=0;
iteration++;
start:
Serial.print("Iteration : ");
Serial.println(iteration);
// is client connected ?
if (!client.connected()) {
Serial.println();
client.flush();
client.stop();
Serial.println("Reconnecting.");
Ethernet.begin(mac, ip, gateway, subnet);
if (client.connect()) {
Serial.println("Connected.");
}
else {
Serial.println("Connection failed. Next try in 5 s.");
delay(5000);
goto start;
}
}
client.flush();
if(asknwait(4,"LOGIN ",user," ",pass)) goto start;
client.flush();
if(asknwait(1,"SELECT INBOX")) goto start;
int j=0;
while(client.available()>0)
{
c=client.read();
Serial.print(c);
if (c==matchseq[j]) {
j++;
}
else {
j=0;
}
if (j==matchseqlength) break;
}
digitalWrite(LEDPIN,j==matchseqlength);
client.flush();
asknwait(1,"LOGOUT");
Serial.print("Fin iteration ");
Serial.println(iteration);
Serial.println("**********\n");
delay(10000);
}
This has been tested with imap.free.fr and webmail.ensad.fr.
It doesn't support SSL authentification yet.
For now, the code runs on a Duemilanove with an ETHERNET Shield but it will be integrated in a YellowJacket, an Arduino mini with a Wifi connection as soon as I received the board.
I will post the changes of the code for the yellow jacket and also some pictures of the final object as soon as possible.
Feedbacks are welcome 
a.