Hi Marc, Have you changed the RF230DriverLayerP file? I think the ED and RSSI measurements are not performed at the same time. The ED is done automatically by the hardware after the SYNC byte is received, while the RSSI is done manually when the first interrupt is handled. This could cause some difference.
Best, Miklos 2011/10/5 Marc Barceló <[email protected]>: > Hello to everyone, > > I am a researcher working on WSN, using IRIS motes (which use RF230 Radio > Hardware). I am measuring the received power from one mote to another. The > RF230 datasheet says that two different measures can be used, Energie > Detection (ED) or Received Signal Strength Indicator (RSSI). To convert the > measured values to dBm, according to the datasheet, for the first case it is > necessary to do: PRF = ED_VAL -91. For the second case the following has to > be done PRF = RSSI_BASE_VAL + 3•(RSSI - 1). The problem is that these > measures does not seem to be equivalent since using the ED measure I receive > more power( a difference greater than 10 dB) in comparisson with the RSSI > measure. I am using the Basic operating mode so, since what I know, both > measures should be very similar. > > I would appreciate any help, > > Best Regards > _______________________________________________ > Tinyos-help mailing list > [email protected] > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > _______________________________________________ Tinyos-help mailing list [email protected] https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
