Transmission Times out After a While Randomly about libxbee3 HOT 1 CLOSED

Hello,

Please could you enable debugging (see #7 here
http://attie.co.uk/libxbee/getting_started/its_not_working).
It's important that and XBEE_LOG_RX are XBEE_LOG_TX enabled.

I'm interested to see if there is any communication between libxbee and the
XBee module, or if this stops completely (my suspicion).

Please re-run your application, and attach the log output.

Attie

On 19 January 2016 at 01:14, Matthew Hsu [email protected] wrote:

Hello,

I'm currently trying to send data using the xbee_connTx(...) method to
send data between two series three XBees, both at 57600 baud on an Ubuntu
13.04. The code that I am using can be found here
https://github.com/CURocketry/LaunchVehicleController2016/blob/c127752cb3e664ce98da45a721671853de15d45e/src/main.c.
I have been testing with the XBees stationary and right next to each other.

The transmission code is roughly as follows:

for (;;) {
/* do stuff to the buffer */
if ((ret = xbee_connTx(con, &retVal, buf_start, buf_size)) != XBEE_ENONE) {
if (ret == XBEE_ETX) {
printf("tx error (0x%02X)\n", retVal);
} else {
printf("error: %s\n", xbee_errorToStr(ret));
}
}
usleep(500000); //500ms

}

I'm currently running into an issue where, inconsistently after a few
hundred transmissions or so, transmission returns an error of
XBEE_ETIMEOUT. It works again if I terminate the program and restart it.
Each time, the number of transmissions that go through vary: sometimes 50
might work, other times >300. Even though transmission is timing out,
packets can still be successfully received.

I have already tried:

• Increasing/decreasing the delay in the infinite loop. (50ms-1000ms)
• Sending only one byte at a time.
• Disabling and enabling ACK.

I saw your documentation on connection types
http://attie.co.uk/libxbee/func_overview#connection-oriented_interface_
and have figured out that the semaphore in (xbee_framewait)[
https://github.com/attie/libxbee3/blob/bc2dae498c3009e7aa50e1124988200f877e436a/frame.c#L130]
is timing out after the default 1 second, but I am not sure how to further
debug the issue or what the root cause might be.

Any help would be greatly appreciated!

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