关于sendDone event

问题：Has the packet really been sent when you receive sendDone?

 

Steve said： In general for the cc2420 getting the send done means that the packet

has gone out over the air.  If you're seeing packet losses with this

sort of thing, it could definitly be hidden terminal.  However, the

cc2420 stack does not retry transmissions by default (or even request

an ack).  If that's what you want you'll need to look into the

PacketLink and PacketAcknowledgements interface.

 

You could see if the nodes are backing off due to contention by wiring

to the RadioBackoff interface and incrementing a counter in

requestContentionBackoff.