[Tinyos-help] reading rssi on Micaz gives incorrect values (-135 dBm)

Mayur Maheshwari mayur.maheshwari at gmail.com
Fri Nov 2 11:19:01 PDT 2007


Hi,

I am trying to read rssi values for my application (on basestation). The
algorithm I use calculates ambient noise by reading the rssi value just
after the packet is received at basestation. This seems to work fine on
telosb, but on micaz 3-4/10 times  I get a  strange reading of -135 dBm. (at
other times I get a value of -95 which seems to be correct for ambient
noise). On telosb I regularly get this correct value.

Any ideas why this is happening on micaz. I am wondering if it could be
related to some bus contention issue?

Thanks,

-- 
Mayur Maheshwari(mayur.maheshwari at ieee.org)

"Karmanye Vadhikaraste Ma Phaleshu Kadachana,
Ma Karma Phala Hetur Bhurmatey Sangostva Akarmani"
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