[Tinyos-help] Acks on application BaseStationCC2420

[Philip Levis]

On Jan 14, 2007, at 11:56 PM, Shuo Xiao wrote:

> Hi everyone,
>
> I'd like to add the acks function on application BaseStationCC2420  
> in tinyos 2.0 (and I used micaz platform). That is to say, one mote  
> sends packets to the BaseStation by radio link, and then PC  
> connecting to BaseStation displays packets of the BaseStation by  
> serial link. In the meantime, the BaseStation sends acks back to  
> the sender mote by radio link.
>
> I tried to call the command "RadioSend.send"  in the event  
> "RadioReceive.receive", which manually sent packets to acknowledge  
> previous packets. Can I use interface PacketAcknowledgements in  
> this application to implement acks function and how? And the  
> implementation of interface PacketAcknowledgements actually sends  
> back ack packets without payload, complying with IEEE 802.15.4, am  
> I right?

With the CC2420, you get either hardware acknowlegments OR the  
ability to hear all packets; you can't have both. If you want an app  
that only receives packets addressed to it and acknowledges them,  
then use the standard BaseStation app.


Phil