Dear András Bíró. I think probably with 868 MHz was better than 2.4 GHz because the wavelength is the longest. I was expecting to reach at least 25 m.
Thanks a lot for your information. Yours faithfully, Alejandro. > Hi Alejandro, > > I would except much less. We tried to communicate in grain (corn to be > exact), and it was less than 1m. Eventually, we used 868MHz, which was > still really bad, but we could live with that. > But anyway, you should try it, it's quite simple. > One more thing: in our tests, it seemed that it was much better if the > mote was in a bigger box, so its antenna gets farther from the grain > (but we couldn't use this solution). > > Andris > > > On Fri, Oct 5, 2012 at 6:53 PM, <[email protected]> wrote: >> Dear Hamid Rafiei. >> >> Thanks for your answer. >> >> What do you think is the maximum distance in the best case? e.g. in 50 >> m. >> >> Sincerely, >> >> Alejandro >> >> >>> Hi, >>> >>> I believe it all depends on the level of moisture in the soil, in case >>> of >>> a >>> high level of humidity it wouldn't be much at all >>> >>> On Friday, October 5, 2012, wrote: >>> >>>> Dear all, >>>> >>>> Someone know how much is the maximum distance to communicate two >>>> TelosB >>>> under the soil using antenna of 5 dBi each one and 2.4 GHz? I mean the >>>> two >>>> sensors are "buried" even the antennas as well. >>>> >>>> Thanks in advance for any information. >>>> >>>> Regards, >>>> >>>> Alejandro. >>>> >>>> >>>> >>>> _______________________________________________ >>>> Tinyos-help mailing list >>>> [email protected] <javascript:;> >>>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >>>> >>> >>> >>> -- >>> -- Sent from my iPhone >>> >> >> >> _______________________________________________ >> 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
