Dear Ravi, I've also done some test for CTP currrent consumption using micaz. I have the same result as you are. It took around 30 min for a node to join a network, and the minimum current consumption is around 5-6mA (not shown in my graph).
My test result (along with the firmware that I used) is in : http://gamedevel.wordpress.com/2007/08/06/micaz-platform-current-consumption-with-tinyos-2x-multiple-hop-radio-and-power-management/ A bit misuse of my personal blog. But I want to know whether others has the same experience with T2.0.1 I think the 5-6mA represents IDLE sleeping mode, which is caused by the Timer1. The Timer1 is used to cycle the radio. Thus, according to getPowerState() in McuSleepC.nc in tos/chips/atm128, if Timer1 overflow interrupt is activated the sleep mode should be IDLE. So, if we move the power cycle from Timer1 to Timer0 ASYNC, I think we can use POWER_SAVE idle mode (around 8uA according to the datasheet). Am I correct ? Regards, -daniel -------- Original Message -------- > From: Ravi Prasad <[EMAIL PROTECTED]> > Sent: Monday, August 06, 2007 9:28 AM > To: [EMAIL PROTECTED] > Subject: Re: [Tinyos-help] Again!!!! Low-power CC2420 multihop in TinyOS2.x > question???? > > Hi Roman, > > Thanks for your suggestions. > > The modifications you stated will help reduce power > consumption. > > But again looking into your suggestions what I did > should give a low power consumption (=~ 200uA to > 300uA) in general case. Because if I do not use > rxSleep for packets forwarded directly to root, it > will help reduce power consumption ONLY in nodes at > single hop distance from root. Also for accumulating > packets and sending in a burst will help in case of > medium to high network traffic. But I tested with very > low network traffic. > > Please correct me if I am wrong. > > The last suggestion to modify offsets and windows is > not very clear to me. I am looking into it. But it > would be great if you can elaborate a bit. > > Also I am very keen to know the exact power > consumption you acheived by using LPL in Tmotes. > > Because it is very weird that in micaz i get 4mA sleep > current and in Tmote it is 200-300uA. ATmega128 has > higher sleep current as compared to Msp430. We can > also assume that micaz board is more power hungry then > telos. But the difference should not be more than few > 10uA. > > > Regards > Ravi _______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
