XBEE, the coordinator cannot receive the message from the two routers

Hello professors,

I'm trying to let two routers to send message at the same time to test if there is data collision. the DH/DL of coordinator I set is 0/FFFF which is broadcast, and the DL/DH of both routers I set is used the source address of the coordinator. But the problem is it doesnt work.... sometimes the coordinator can only get message from only one router. I think it should be displayed both messages from the two routers. I'm really appreciate for your suggestion, thanks.

Best regards

I think it should be displayed both messages from the two routers.

So, why doesn't the mysterious code, that you didn't post, do that?

Could it have anything to do with:

I'm trying to let two routers to send message at the same time to test if there is data collision.

What happens if there is data collision? You really can't expect some magic to happen to allow both messages to be received at the same time.