What do you mean that your motes should respond immediately to a message? What kind of response are you looking for?
The microcontroller automatically enters sleep state when no tasks are pending. It takes about 1-6us for the microcontroller to wake. The radio is on continuously unless you set a schedule using SP in Boomerang or explicitly turn the radio on or off. If you are asking "why does it take 3-10ms to transmit a message in response to a received message", the answer is due to 3 things: (1) the switching time of the radio, (2) the CSMA backoff period, and (3) the processing overhead of receiving the packet, creating a new packet, and putting it into the radio's transmit buffer. If this does not answer your question, please clarify exactly what you are doing and expecting in detail. -Joe On 7/19/06, giovanni gamba <[EMAIL PROTECTED]> wrote:
I, i'm working on Tmote Sky and i have a question on power saving state. When the mote is not active, does it go in a power saving state by default? My question has a precise aim... when my motes receive a message they should response immediately, but i see a delay of several (3-10) ms. Is this normal? I see something on papers from Moteiv and i see that the radio has to wake up and this takes few ms. I do not formally put my motes in power down mode... (i mean, i don't use commands or modules for this). I would like to know if this behaviour is correct. Thank you very much _______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
_______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
