Zigbee 802.15.4 Asynchronous CSMA MAC Example Help

Hello,

I am using the Communications Toolbox for Zigbee. I am trying to implement a Zigbee network based on the IEEE 802.15.4 - Asynchronous CSMA MAC - MATLAB & Simulink Example .

I am attempting to send data and I think I am not understanding how this example is setting the payload for each packet. I assumed that the payload was using this:

% Initialize device inputs

received1 = zeros(samplesPerChip * chipsPerSymbol * symbolsPerStep/2, 1);

received2 = zeros(samplesPerChip * chipsPerSymbol * symbolsPerStep/2, 1);

and that calling:

transmitted1 = panCoordinator(received1);

Would send this payload. But this doesnt seem to be the case, as changing that value to anything but a 1280x1 array of zeros sends errors.

Any help would be greatly appreciated. Thanks.