Hi all, I would say from my experiments that if u change from 3 to 1, you get a significant difference of TX power.. Cheers Daniele
Daniele Munaretto Researcher DoCoMo Communications Laboratories Europe GmbH Landsbergerstraße 312 80687 Munich Germany Mobile : +49- 162- 2919-218 Office : +49- 89- 56824-218 Fax : +49- 89- 56824-300 [EMAIL PROTECTED] visit us in http://www.docomolab-euro.com Managing Directors (Geschäftsführer): Dr. Toru Otsu, Dr. Narumi Umeda, Kazushige Yoshida Amtsgericht München, HRB 132967 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Urs Hunkeler Sent: Monday, July 16, 2007 4:12 PM To: vazoumana fofana Cc: tinyos-help@Millennium.Berkeley.EDU Subject: Re: [Tinyos-help] [reduce power] Hi, Have a look at the CC2420 data-sheet at http://www.ti.com/lit/gpn/cc2420 (page 51). Actually the CC2420 only supports 8 discreet values for the TX power. A value of 3 or below (including 1) would correspond to the lowest TX power of -25 dBm. Cheers, Urs vazoumana fofana schrieb: > Hello, > > i ve succeded in reducing power. I ve got a precision to ask : what s > the meaning of the value 1. Which unit does it correpond ? > >> From: Urs Hunkeler <[EMAIL PROTECTED]> >> To: vazoumana fofana <[EMAIL PROTECTED]>, >> tinyos-help@Millennium.Berkeley.EDU >> Subject: Re: [Tinyos-help] [reduce power] >> Date: Fri, 13 Jul 2007 16:13:47 +0200 >> >> Hi, >> >> This is what I previously wrote about reducing TX power: >> >> In Tinyos 2 with a platform with the cc2420 (such as MicaZ and the >> Tmotes), you can use either a flag in the makefile: >> >> CFLAGS += "-DCC2420_DEF_RFPOWER=1" >> >> or you can dynamically change the tx power at runtime (individually for >> every packet) with something like (wire in the CC2420PacketC module): >> >> call CC2420Packet.setPower(&rpacket, 1); >> >> You'll have to issue that call for every packet prior to sending it. >> >> Reducing the TX power to its minimum I get a maximum transmission range >> of roughly 3 meters under ideal conditions. >> >> Cheers, >> Urs >> >> >> vazoumana fofana schrieb: >> > Hello >> > * >> > I ve seen mails exchanged about this field but i lost it. >> > Does somebpdy how i can reduce power transmission on telos mote under >> > tinyos 2.x. >> > I want to experiment multi hop network so i need to reduce trhe >> range of >> > each mote. >> > >> > Thanks for any help. > > _________________________________________________________________ > Windows Live Spaces : créez votre blog à votre image ! > http://www.windowslive.fr/spaces > _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
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