[Tinyos-help] [reduce power]

[Urs Hunkeler]

Hi,

This is what I previously wrote about reducing TX power:

In Tinyos 2 with a platform with the cc2420 (such as MicaZ and the
Tmotes), you can use either a flag in the makefile:

CFLAGS += "-DCC2420_DEF_RFPOWER=1"

or you can dynamically change the tx power at runtime (individually for
every packet) with something like (wire in the CC2420PacketC module):

call CC2420Packet.setPower(&rpacket, 1);

You'll have to issue that call for every packet prior to sending it.

Reducing the TX power to its minimum I get a maximum transmission range
of roughly 3 meters under ideal conditions.

Cheers,
Urs


vazoumana fofana schrieb:
> Hello
> *
> I ve seen mails exchanged about this field but  i lost it.
> Does somebpdy how i can  reduce power transmission on telos mote under
> tinyos 2.x.
> I want to experiment multi hop network so i need to reduce trhe range of
> each mote.
> 
> Thanks for any help.