You'll have to go look at the schematics, or horrors....search whatever doc there is...to see if it's the same paradigm as the mica's. On Mica2,Z the Voltage reading is coming from a fixed-value-ref where the ADC ref is the actual battery voltage. So as the battery droops the fixed-ref seems to increase, as does the ADC reading. Knowing the fixed-ref and the number of conversion bits leads to some simple algebra to get battery voltage.
MS Ákos Maróy wrote:
Sorry for having such basic questions again - I'm using the telosb platform, and I'm trying to deduct the voltage level being read from the values I get from the sensor. my assumption is that the sensor is reading the voltage value. I also understand that the sensor can be set up differently depending on the sref value in the documentation. but still, is there a formula on how to deduct the voltage measured based on the sensor reading? Akos _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
-- Platform: WinXP/Cygwin TinyOS version: 1.x, Boomerang Programmer: MIB510 Device(s): Mica2, MicaZ, Tmote Sensor board: homebrew _______________________________________________ Tinyos-help mailing list Tinyos-help@Millennium.Berkeley.EDU https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
