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Step 8 Programming step 2: Connecting to a Wireless Network

Again, this is largely based on the sparkfun tutorial, but I've removed the delays with "waits for response". This speeds things up and is easier to error check.

www.sparkfun.com/commerce/tutorial_info.php

/*

 Send the correct commands to connect to a wireless network using the parameters used on construction

*/

void WiFly::AutoConnect()

{

 delay(DEFAULT_TIME_TO_READY);

 

 FlushRX();

 

 // Enter command mode

 EnterCommandMode();

 

 // Reboot to get device into known state

 WriteToWiFlyCR("reboot");

 WaitUntilReceived("*Reboot*");

 WaitUntilReceived("*READY*");

 

 FlushRX();

 

 // Enter command mode

 EnterCommandMode();

 

 // turn off auto joining

 WriteToWiFlyCR("set wlan join 0");

 WaitUntilReceived(AOK, ERR);

 

 // Set authentication level to

 WriteToWiFly("set w a ");

 WriteToWiFlyCR(auth_level);

 WaitUntilReceived(AOK, ERR);

 

 // Set authentication phrase to

 WriteToWiFly("set w p ");

 WriteToWiFlyCR(m_password);

 WaitUntilReceived(AOK, ERR);

 

 // Set localport to

 WriteToWiFly("set i l ");

 WriteToWiFlyCR(port_listen);

 WaitUntilReceived(AOK, ERR);

 

 // Deactivate remote connection automatic message

 WriteToWiFlyCR("set comm remote 0");

 WaitUntilReceived(AOK, ERR);

 

 // Join wireless network

 WriteToWiFly("join ");

 WriteToWiFlyCR(m_network); 

 delay(DEFAULT_TIME_TO_JOIN);

 

 bool ok = WaitUntilReceived("IP=");

 delay(DEFAULT_TIME_TO_WAIT);

 

 FlushRX();

 

 if(ok == false)

 {

    m_printer->print("Failed to associate with '");

    m_printer->print(m_network);

    m_printer->println("'\n\rRetrying...");

    FlushRX();

    AutoConnect();

 }

 else

 {

    m_printer->println("Associated!");

    ExitCommandMode();

 }

 

 // TODO save this configuration

}

 

 

/*

 Enter command mode by sending: $$$

 Characters are passed until this exact sequence is seen. If any bytes are seen before these chars, or

 after these chars, in a 1 second window, command mode will not be entered and these bytes will be passed

 on to other side.

*/

void WiFly::EnterCommandMode()

{

 FlushRX();

 delay(1000); // wait 1s as instructed above

 m_printer->println("Entering command mode.");

 WriteToWiFly("$$$");

 WaitUntilReceived("CMD");

}

 

 

/*

 exit command mode

 send the "exit" command and await the confirmation result "EXIT"

*/

void WiFly::ExitCommandMode()

{

 WriteToWiFlyCR("exit");

 WaitUntilReceived("EXIT");

}