Hello everybody,

We are working on an outdoor WSN application, which should collect data
from one or more motes in the field to a single mote connected to a
computer. This mote has no power restrictions (powered via USB
connection), however the motes in the field do have power restrictions.
Currently the power consumption of these motes is rather high since the
radio reciever is always on. 

Our communication scheme is very simple: after a START command, the
field motes start transmitting data at regular interval for a (long)
fixed period of time; so after the START command the field motes do not
need to receive data from the central mote

We already looked into using NetSync or compiling for lowpower, but
these mechanisms seem to be rather complex for our approach. Is there an
easier way how we can switch off the radio chip between transmissions
(on the field motes)?

Martin


PS:
Some extra info:
- the mote connected to the PC is running TOSBase and all data is
collected using a Java application. 
- the motes are Tmote Sky, Tmote Mini and Tmote Mini Plus
- we use SPReceive and SPSend for communication on the field motes

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