as far as I am aware 15ms could be quite normal, though it should be slightly quicker on average? I measured a range of between 3 and 13ms between calling .send() and getting .sendDone() back on a cc2420 (MICAz) while sending very small packets (1 or 2 bytes payload, I forget exactly).
approx: ~1-10ms initial random backoff ~1ms for every 30 bytes sent at maximum (theoretical) rate of 240kbps There's probably a way to adjust the backoff. LPL manages to stream repeated sendings of the same packet at a far higher rate. hope that helps as a starting point? -Ben > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf > Of Bhavish > Aggarwal > Sent: 31 March 2008 14:30 > To: tinyos-help@millennium.berkeley.edu > Subject: [Tinyos-help] CC2420 Send interface > > > Hi, > > I have to send packets over the CC2420 radio on tmote sky at a fast > rate. I tried using the "AMSend" interface but this takes roughly 15ms > per packet. I have not been able to figure out the reason for this > high value. One possible reason could be that the AMSend addresses the > packets so it might take a lot of overhead. There is an alternate > "Send" interface which sends without addressing. But I couldn't find > any component implementing it. Does anyone know the reason for this > high value of time taken per packet or which component implements the > "Send" interface for CC2420 radio? > > Thanks, > > Bhavish > _______________________________________________ > Tinyos-help mailing list > Tinyos-help@millennium.berkeley.edu > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/t > inyos-help > ******************************************************************************* Please consider the environment before printing this email. ******************************************************************************* This email and any files transmitted with it are intended solely for the use of the individual or entity to whom they are addressed and may not be divulged to any third party without the express permission of the originator. Any views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of Thales Research & Technology (UK) Limited. ******************************************************************************* _______________________________________________ Tinyos-help mailing list Tinyos-help@millennium.berkeley.edu https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
