[Tinyos-help] error while incorporating interface CC2420Packet;

[Philip Levis]

On Dec 3, 2007, at 10:01 PM, Vijayant Bhatnagar wrote:

> Hi,
> Since we have started working on TinyOS a week back, I may be  
> wrong. The following is the change I made:
> Please correct me if I am wrong :
>
>
>
>     call GainRadioModel.putOnAirTo(destNode, sending, metadata- 
> >ack, evt->time, power, power);      //Modified by Vijayant
>

This is problematic. You are setting the TX power of the receiver's  
ACK to be the same TX power as the transmitter. The reason this is  
problematic is because the two might not have the same TX powers, and  
if the receiver's power is lower than the transmitters you might get  
lots of false negative acks. By setting it in this way, you assume a  
perfectly consistent TX power setting scheme, which is not achievable  
in practice. It would make your results fictional and unachievable in  
reality.

As for what those values can be, you should consult chip data sheets  
(e.g., CC1000, CC2420).

Phil