-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 >> We took indoor measurements of the strength value too. The value that we got back was a uint16_t value. And it showed a steadily increasing trend - which makes sense after reading this >> email.
Using CC2420 the strength value is a uint8_t value, according to AM standard, that can be found in /tos/platforms/micaz, for example. Using a CC1000 the algorithm is different. At the following link you can find information about how to do that (remember to set the output power value to the level you want, and that for CC1000 the frequencies are not around 2.4GHz but 915MHz and 433MHz ) http://www.xbow.com/Support/Support_pdf_files/MPR-MIB_Series_Users_Manual.pdf >>However, the uint8_t part is a bit of a concern. Our measurements stared at a value of 60 and ended at a value of 324 (distances from 0" to about 100"). We applied the same transform >>that you suggested below (ours is a CC1000 radio so the offset's 41? :shrug: ). after looking at the link suggested below you would be able to convert correctly the RSSI into dBm value. >> We did get a progressively decreasing trend. examples of RSSI-distance measured by myself are in the attatchment, and you can find similar results in litarature. wish to be helpful roberto -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFEUzuurt4NkCCuMLkRAl+KAJ9nEkg3IZt4YHLoORpBuwG085E0SACfVStV wrE4L8+fVwVeEM0ROLYAeaI= =2WhT -----END PGP SIGNATURE-----
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