[Tinyos-help] [TinyOS-help] Transmission power

[Rémi Villé]

Hi,

I'm a beginer with TinyOS and I would like to have a low radio
transmission power to test Collection without dispatching motes
(TelosB) in all the building...
So I found this thread
(www.millennium.berkeley.edu/pipermail/tinyos-help/2009-February/038031.html)
which speak about CC2420PacketC.nc.
In CC2420Packet.nc interface  there is  the async command  setPower(
message_t* p_msg, uint8_t power ), it seams that I can set power
between 0 and 31...

I would like to know if it's the good way to test multi-hop (whith Collection).
How work the setPower command (the power chosen will be use with all
the message_t* p_msg, and not other type of message?, is there a way
too apply the power to all transmissions (a default value at compile
maybe)?)
I heard that when power is too low, transmission become bizarre, so I
don't know which power to use.

Thanks,

Rémi Villé