Solved. I had 2 PCB's each of which had a GND. Connecting the GND pins of
the PCB's solved the problem.
> hi,
> Here is an experiment that i performed to compare the idle voltages i
> get at pins SO,SI and SCLK.
>
> telosb(tmote-sky) platform {SO=2.4V, SI=2.4V, SCLK = 2.4V}
>
> I attached an external radio to the original telosb platform (disabled the
> radio that comes with the tmote-sky) and tried measuring the same.
>
> New platform {SO=2.4V, SI=2.4V, SCLK = 0.7V}
>
> As SCLK is just an input to the radios, attaching a different radio to the
> SPI pins should not make any difference to SCLK.
>
>
> Any idea why this happens?
>
> P.S: In the MotePlatformC.nc file, the initial values of the pins(S),SI
> and SCLK) are specified to be the same in both platforms.
>
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>
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