Hi, I'm using tinyos-2.1.0 and telosb (with cc2420 radio). I wand to just send one packet periodically (don't use receiver). I use Low Power Listening to reduce the power consumption as much as possible. I've also disabled CCA check.
After measuring the current drawn for sending packet, I saw that there is a time interval before sending packet in which the power consumption is too much (near 22mA). In this figure I marked that period with question mark. https://www.dropbox.com/s/sxphioa3xhs66ms/wave3.bmp After digging the code, I found some possible reasons for that. 1) Before sending a packet, STXON.strobe is called. This will enable TX after calibration (if not already performed). So maybe this power consumption is because of turning on the radio. 2) CC2420 is capable of doing in-line encryption. So maybe this power consumption is because of encrypting the packet before sending that. Now, can any one tell me which of aforementioned options is the reason? And if it is because of encryption, how can I disable it? Thanks Farzad _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
