exceptions.TimeoutException: There was a timeout while executing the requested operation.

[GiGoShIjAkOvSkI]

Hello to everyone,

i have a xbee and i what to use this java library but i have one problem i got a error:

com.digi.xbee.api.exceptions.TimeoutException: There was a timeout while executing the requested operation. at com.digi.xbee.api.AbstractXBeeDevice.sendXBeePacket(AbstractXBeeDevice.java:989) at com.digi.xbee.api.AbstractXBeeDevice.sendATCommand(AbstractXBeeDevice.java:804) at com.digi.xbee.api.AbstractXBeeDevice.sendParameter(AbstractXBeeDevice.java:1983) at com.digi.xbee.api.AbstractXBeeDevice.getParameter(AbstractXBeeDevice.java:1925) at com.digi.xbee.api.AbstractXBeeDevice.readIOSample(AbstractXBeeDevice.java:1781) at com.digi.xbee.api.AbstractXBeeDevice.getDIOValue(AbstractXBeeDevice.java:1334) at xbee_discover.XBEE_DISCOVER$UpdateOutputTask.run(XBEE_DISCOVER.java:140) at java.util.TimerThread.mainLoop(Timer.java:555) at java.util.TimerThread.run(Timer.java:505)

the code: .............................. .............................. setDIOTimer1.scheduleAtFixedRate(new UpdateOutputTask(remote_dev1), 0,5000); setDIOTimer2.scheduleAtFixedRate(new UpdateOutputTask(remote_dev2), 5000,10000); setDIOTimer3.scheduleAtFixedRate(new UpdateOutputTask(remote_dev3), 10000,20000);

    } catch (XBeeException e) {
        System.out.println(e);
        myDevice.close();
        System.exit(1);
    }
}

private static class UpdateOutputTask extends TimerTask {

    private final RemoteXBeeDevice remoteDevice;

    public UpdateOutputTask(RemoteXBeeDevice remote) {            
        this.remoteDevice = remote;
    }

    @Override
    public void run() {

        try {
            if (remoteDevice.getDIOValue(IOLine.DIO3_AD3) == IOValue.HIGH) {
                remoteDevice.setDIOValue(IOLine.DIO3_AD3, IOValue.LOW);
            } else {
                remoteDevice.setDIOValue(IOLine.DIO3_AD3, IOValue.HIGH);
            }
        } catch (XBeeException ex) {
            Logger.getLogger(XBEE_DISCOVER.class.getName()).log(Level.SEVERE, null, ex);
        }

    }
}

Why i get this exception and how to solve?

[GiGoShIjAkOvSkI]

i debug and view that the exception is throw here

// Write the packet data. writePacket(packet); try { // Wait for response or timeout. synchronized (responseList) { try { responseList.wait(receiveTimeout); } catch (InterruptedException e) {} } // After the wait check if we received any response, if not throw timeout exception. if (responseList.size() < 1) throw new TimeoutException(); // Return the received packet. return responseList.get(0);

I set the receiveTimeout to 4000 but i get the exception!Why?

exception is throw random in time.

This is packet lost?

[daescalona]

Hello,

The timeout exception occurs because you do not receive an answer back from the device. As I saw in the example, you are trying to configure DIO pins of a remote device. Have you verified if there is connection with the remote divice? (fro example performing a device discovery and checking that the device appears in the list).

Also, is the remote device a sleeping device? if so there is a chance the device was sleeping while you were sending the command.

[GiGoShIjAkOvSkI]

Hello,

Thank you for your answer. For your first question do I verify the connection with the remote device the answer is yes. I performed device discovery in the beginning of the program and in the list of discovered devices I see my remote device. For your second question, in my network I have 3 devices, 2 routers and one END device and the error I get is from the router, not from the END device (and the router cannot be sleeping).

I have run the range test ( XCTU), and the results are that from 28 000 240 packets are lost (drop), So my question here is, do I get the exception in the program when a packet is dropped (lost) ?

Thank you in advance

[diescalo]

When performing a range test within XCTU it considers that a packet is lost when it does not receive the answer for that packet in a period of time. That time can be configured in the Range Test options.

The XBee Java Library throws a Timeout Exception when the answer of a frame is not received after a period of time. That time can be changed using the following method of an XBeeDevice object (by default it is 2 seconds):

setReceiveTimeout(int receiveTimeout)

Anyway, I would try to send the same packet you are getting the error using XCTU just to make sure you receive the answer from the remote device.

[lastSpark]

I also receive the same error:

com.digi.xbee.api.exceptions.TimeoutException: There was a timeout while executing the requested operation.
        at com.digi.xbee.api.AbstractXBeeDevice.sendXBeePacket(AbstractXBeeDevice.java:1051)
        at com.digi.xbee.api.AbstractXBeeDevice.sendATCommand(AbstractXBeeDevice.java:866)
        at com.digi.xbee.api.AbstractXBeeDevice.sendParameter(AbstractXBeeDevice.java:2053)
        at com.digi.xbee.api.AbstractXBeeDevice.getParameter(AbstractXBeeDevice.java:1992)
        at com.digi.xbee.api.AbstractXBeeDevice.readIOSample(AbstractXBeeDevice.java:1845)
        at com.digi.xbee.api.AbstractXBeeDevice.getDIOValue(AbstractXBeeDevice.java:1398)
        ...
        at java.util.TimerThread.mainLoop(Timer.java:555)
        at java.util.TimerThread.run(Timer.java:505)

increasing the default 2sec to 5 sec of setReceiveTimeout(int receiveTimeout) does not resolve my issue. Any other suggestion to resolve this?