Hi! I would like to know some examples of gas sensors calibration and sleep modes or modes to hibernate between a period of time. I am reading about Sleep modes (deep, hibernate, etc.) but I don't have clear how to mix them, due to the differents delays. I have readen about weather station but it is quite different from gases. How can I order for example hibernation between time1 and time2?

Thank you so much for your help!!!

Hi MIMG,

to calibrate the sensor properly you should use a gas chamber and measure the output under different concentrations in the range of use. Your calibrated sensor will help you to determine the exact concentration in the chamber if you don't have a way to regulate it. After calibration, adjust the load resistor to match the sensor resistance at the middle of the desired measurement range.

Regarding the hibernate, you have an example here:

http://www.libelium.com/development/waspmote/example035

The difference between hibernate and the other sleep modes is that the only device active in hibernate mode is the RTC, that triggers an interruption to wake up the mote after a given time or at a determined hour.

You can find more information in section 3.3 of the Waspmote Power Programming Guide.

http://www.libelium.com/documentation/w ... _guide.pdf

Regards.