Radio range will depend on how close to the ground you are. The range you are describing for your mica2's seems about right for a mote on the ground. If you can put them on a pole or in a tree, you will improve your range considerably.
You might also want to look at the XE1205 radio on the tinynode (from shockfish). At 30kbps we've been able to get 500m+ near the ground and near water with the whip antennae they come with. They claim that you can get 1km+ with a data rate of 1.2kbps, but tinyos doesn't currently support any data rate under 30kbps. Jacob On 9/25/07, Demin Wang <[EMAIL PROTECTED]> wrote: > > We used 2.4GHz 8.5 dBi antennas on MicaZs and can reach maximum 400 > meters with the maximum transmission power. > > demin > > On 9/25/07, Tony Han <[EMAIL PROTECTED]> wrote: > > Hi folks, > > > > I try to use mica2 sending data for 100m in certain area (have a few > trees > > and a creek around), but now, with 900MHz mica2, I get only 10 m in that > > environment, and if I use 433MHz mica2, I got 30m, still far less than > 100m. > > I use TinyOS 1.1.15. I set the transmission power to the maximum value > in > > MakeXbowlocal file. > > > > My question: is there any other "mote" has a longer range? or is there > any > > antenna can improve the TX and RX distance? > > > > I saw people deal with reduce the range for micaz, but please someone > help > > in increase the range. > > > > Thank you in advance > > > > Tony > > > > > > > > > > > > > > _______________________________________________ > > Tinyos-help mailing list > > Tinyos-help@Millennium.Berkeley.EDU > > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help > > > _______________________________________________ > Tinyos-help mailing list > Tinyos-help@Millennium.Berkeley.EDU > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >
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