(using a mts300ca board on a crossbow micaz mote and tinyos 2.x)
A did a simple experiment, I added one Timer to the Oscilloscope application, which is set periodic and samples the photosensor (every 100ms), lighting the leds with the most significant bits of the sensor reading; the other timer is used with a startOneShot(5000) (on Boot.booted() ) to start the radio when it is fired (just start the radio, do nothing else, no sending and no receiving). The light readings are ok before the radio starts, after that the value always has the most significant bit on. It's not just that the bit is on, the readings change on the other bits, but now the value is never lower than 512 (most significant bit). After turning off the radio, values go back to normal. Turning on the radio is affecting the adc voltage readings? The same happens with the TempC sensor, which has the same adc. The microphone doesn't seem to be affected by this. Any thoughts? Cheers, Hugo On 4/24/07, Hugo Sousa < [EMAIL PROTECTED] > wrote:
Forgot to mention, this only happens with the oscilloscope application. With Sense the readings are normal. On 4/24/07, Hugo Sousa < [EMAIL PROTECTED]> wrote: > > I never get light readings below a certain value (~500), not even in a > closed box, why is that? Any kind of calibration is needed? Heat > sensitivity? Also, while in the closed box, the readings slowly go up. > > Cheers, > Hugo >
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