XBee Hibernate puts the Arduino asleep as well!

Using Arduino Programming Questions
1

Hey there,
Time to hobby again with a XBee. Playing around with the Hibernate function on the XBee. It seems I can put the XBee asleep, but the Arduino main-loop stops as well, while it shouldn't. What I'm trying to do is:

  • Arduino pin 8 is connected with XBee pin 9 for the sleep command
  • in Setup(), set pin8 LOW, connect with the XBee and send "+++", followed by "ATSM 1"
  • Set pin 9 of the XBee HIGH (=go to bed?)
  • In the meanwhile, let the main loop switch on LED 13 shortly each 7 seconds

Nothing fancy, but when the XBee goes asleep (the green "Accosciate" LED on the shield goes off), the Arduino loop stops as well. At least, I don't see my LED toggling anymore.

If I keep pin 9 low, or put the sleep mode at ATSM 0 (sleep off), the main loop keeps working... It's as if the main loop is waiting forever, but for what (serial input?)? Should I stop the Serial connection as well when putting it to sleep (Serial.), and thus also restart with Serial.begin when I want to wake-up the XBee?

    void setup()
    {
        // Wake XBee, set it up
        pinMode( 13 , OUTPUT);     // LED
        pinMode(  8 , OUTPUT);     // Goes to XBee Hibernate pin 9
        digitalWrite(  8, LOW  );  // Power up
        digitalWrite( 13, LOW  );  //

        delay(250);        

        // Start serial comm, and send AT command to set the sleep modus
        Serial.begin( 9600 );        
        Serial.flush();
        delay(2100);
        Serial.print("+++");  // put the XBee in command mode
        Serial.flush();
        delay(1100);

        if (checkSerialForOk()) 
        {
           Serial.println("ATSM 1");
           Serial.flush();
           if (checkSerialForOk()) 
           {
              digitalWrite( 13, HIGH );	// Test if we received "OK"
           }
        }
        
        // Bedtime
        digitalWrite( 8, HIGH );

    } // setup
    
    
    void loop()
    {
	delay(7000);
        digitalWrite( 13, HIGH );  // Just show we're alive
	delay( 1000 );	
        digitalWrite( 13, LOW );
	// Later on I want to wake up the XBee each X time, and use the watchdog
	// to put the Arduino asleep as well...
    }

Additional notes:
- Also when storing the sleep mode and skipping the entire AT-command setup will put both the XBee & Arduino asleep.
- Once asleep, the reset button doesn't work anymore... The green "power" LED keeps on though
- Using a Arduino duemilanove Atmega 328, XBee shield & Xbee shield. Nothing else.

Rick

2

Hi,

I don't understand you quite well. But I'm trying to explain what I'm doing.

I'm using an arduino FIO with a xbee module. The fio will feed from a battery. Like you, I achieve to sleep the xbee module, but I'm not sure if doing that I'm sleeping the fio too.

I have some questions or comments to ask.... You enter on command mode, why? I used the x-ctu program to enable SM to 1, I'm not concerning to putting to 0 later. I copy I part of my program

void setup() {
pinMode(sleepPin, OUTPUT); // OUTPUT controls xbee module
digitalWrite(sleepPin, LOW); // set to LOW (wake)

xbee.begin(9600); // start XBee communication
}

void loop() {

Serial.print("\n zZzZzZzZ \n");
digitalWrite(sleepPin, HIGH); // sleep state

delay(SLEEP_CYCLE*1000); // tiempo en ms, declarado como UNSIGNED LONG !!!!

digitalWrite(sleepPin, LOW); // ESTADO DESPIERTO
Serial.print("\n DESPIERTO\n");
delay(1000);
// 1. medir temperatura y humedad
temperature = readSensor('T');
humidity = readSensor('H');
uint8_t data[] = { 3,4,1,temperature,2,humidity };
uint8_t length = sizeof(data);
uint8_t option = 0;

As you can see I do not enter to command mode...

well, maybe you don't need my experience xD but I was wondering if you are interesting on sleeping the board. I found these libraries:
narcoleptic --> (Google Code Archive - Long-term storage for Google Code Project Hosting.)
enerlib --> (Arduino Playground - LibraryList).

But, in all of them, it seems to be necessary an external action like press a button or write something on the monitor ... Well, rigth now, I am not quite sure of that, but what I need is a sort of a counter that when it is expired the board wakes up do something and again sleep, all itself without a external action.

I hope I could help you and overall, you or somebody could give me a clue.

Greetings

(sorry for my english)