[Tinyos-help] transmission range

[José Manuel Sánchez-Matamoros Pérez]

I have used mica2 motes at 900MHz and i get more than 20 meters with a mote
on the ground. On this experiment we don't configure the mote at the max
power, so i think we can obtain a greater distance easily.

Another think you must to check is the battery level.

On 9/25/07, Jacob Sorber <jacob.sorber at gmail.com> wrote:
>
> 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 < wdm9511 at gmail.com> 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 <tony.weihan at gmail.com> 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
> > >
> > >
> > >
> > >
> > >
> > >
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> >
> > >
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>
>
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