[Tinyos-help] RSSI values of mica2

ram kishore rapoliit at gmail.com
Tue Jun 3 03:57:49 PDT 2008


Hi,
      I receive RSSI values( uint16_t type) using Msg->strength feild
.At maximum power, I get RSSI(ADC) value as 0x0015.Given in
/tos/platform/mica2/ADCREFM.nc file(attached) is the following
formula:

ADC = (Vport*1024) / Vref; Where Vref =1.23V as in ADCREFM file.I find
Vport using above equation for 0x0015(integer=21) and substitute in

RSSI(dBm) = -50 * Vport -45.5 ;

I get -46.2612 dBm which is wrong actually.I use tinyos1.1.10.I posted
this problem several times all in vain.Please help me out.I am going
out of head.Please.

Thanking you,
Kishore


More information about the Tinyos-help mailing list