The temperature calibration looks straight forward enough, but I had some questions about the calibration of the light sensor. Is there any device you recommend for taking the reference reading of the lux level?
A pyrometer is typically used for light calibration.
How many calibration points do you typically do yourself?
At least 2, depending on the response curve of the sensor.
Also, sorry if I missed it but I didn't see any conversion from ADC value to SI units for the S9067 light sensor. I looked on the tinyOS message list, the net, the Hanamatsu company website and the moteiv support pages, and could see it. Do you have for instance a pdf with this information.
See pages 27-28 of the Tmote Invent user's guide. It tells you how to calculate the photocurrent, I, of the sensor based on your gain settings. The S9067 datasheet at www.hamamatsu.com has a graph of Lux vs Photocurrent. http://sales.hamamatsu.com/assets/pdf/parts_S/S9066-01_S9067-01.pdf -Joe _______________________________________________ Tinyos-help mailing list [email protected] https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
