Thanks for your help I use xbow's CntToLedsAndRfm application to send the packets so I thought changing the RF power in the MakeXbowlocal file was going to work.
On 9/11/06, Michael Collett <[EMAIL PROTECTED]> wrote:
It's likely that you are not actually changing the transmit power. Other people have had a similar problems: http://mail.millennium.berkeley.edu/pipermail/tinyos-help/2006-September/019053.html http://mail.millennium.berkeley.edu/pipermail/tinyos-help/2006-September/019026.html It's all about keeping track of what header files are being included by your code, and changing all the right ones. The help archives should point you in the right direction... Mike -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Philip Levis Sent: 11 September 2006 17:36 To: Adam Scheuring Cc: tinyos-help@Millennium.Berkeley.EDU Subject: Re: [Tinyos-help] RSSI value on micaz On Sep 11, 2006, at 9:12 AM, Adam Scheuring wrote: > Dear list members, > Im making measurements of received radio signal strength of micaz > motes. My setup contains a transmitter and a receiver. The receiver is > connected to a MIB520 board and im changing the distance between the > transmitter and the receiver to get a rssi-range characteristic. > I have the following "problem": i have programmed the transmitter's > radio to 0dBm and -25dBm transmit power and the none the > characteristic nor the values were changed significantly. I have > checked that they are really programmed to different transmit power > leves by checking the maximum transmit range, but the RSSI values were > nearly the same in both cases. > Is it possible that the RSSI calculates with the transmitter's power? > I have only found this in the Chipcon CC2420 datasheet: > It's not calculated with the transmitter's power. You should see different RSSI values. My best guess is that the way you're changing the transmit power isn't working. Phil _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help ------------------------------------------------------------------- This e-mail and any attachments may contain confidential and/or privileged material; it is for the intended addressee(s) only. If you are not a named addressee, you must not use, retain or disclose such information. NPL Management Ltd cannot guarantee that the e-mail or any attachments are free from viruses. NPL Management Ltd. Registered in England and Wales. No: 2937881 Registered Office: Serco House, 16 Bartley Wood Business Park, Hook, Hampshire, United Kingdom RG27 9UY ------------------------------------------------------------------- _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
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