The value actually changes in time (at least on TMote Sky platform), so I would not call it constant. Definitely voltage != remaining charge, but this is all you can get easily. The charge can be estimated but it's not easy because batteries differ a lot. Naturally they have various capacities, but also they may be optimised for constant low current or bursty consumption, so some monitoring of the actual load may be needed.
Regards, Timofei On Sat, Jul 25, 2015 at 12:43 PM, Nahr Elk <[email protected]> wrote: > First, thank you for your prompt, Alexander and Timofei. > But, to the best of my knowledge, VoltageC component gives a constant > value which represents the electromotive force of the battery (i.e battery > voltage). > > -- > Nahr Elk > > 2015-07-24 14:39 GMT+01:00 Alexander <[email protected]>: > >> It will show battery voltage only but not how much energy left. >> >> Regards, Alex. >> >> 24 июля 2015 г., в 15:19, Timofei Istomin <[email protected]> написал(а): >> >> Hi, >> You can use the VoltageC component. >> Instructions are available, e.g., here >> <http://www.tinyos.net/dist-2.0.0/tinyos-2.x/doc/html/tutorial/lesson5.html> >> . >> >> Regards, >> Timofei >> >> On Fri, Jul 24, 2015 at 2:03 PM, Nahr Elk <[email protected]> wrote: >> >>> Hello, >>> >>> Please, how can I measure the remaining battery level in a sensor node. >>> >>> (something like to what is shown in cell phones). >>> >>> >>> Thanks. >>> >>> >>> -- >>> Nahr Elk >>> >>> _______________________________________________ >>> Tinyos-help mailing list >>> [email protected] >>> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >>> >> >> _______________________________________________ >> Tinyos-help mailing list >> [email protected] >> https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help >> >> >> >
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