Hi Matteo, You should interpret rssi reading as signed 8 bit value in 2's complement form. (From Page 64 of 87: CC2420 datasheet) "RSSI (0x13) - RSSI and CCA Status and Control Register" part
On Sun, Aug 16, 2009 at 1:09 AM, Matteo Dany <[email protected]> wrote: > Hi guys, > > I have a tmote sky and I search to read a Rssi, but I have little > problem with convert Rssi . > I read correctly the Rssi from radio message and the value appears in > a range 0, 255. But how convert the value in dbm? > I search in google and I read the CC2420 datasheet, they suggest to > subtract -45 to the value found. > When I found 255 - 45 = 210 dbm? I read in the datasheet that the > range is from 0 to -100 dbm. > Where I wrong? > > > Thank you very much > > Matt > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > -- Mehmet Akif Antepli Grad. Student Dept. of EEE Middle East Technical University
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