Hi folks, I like to collect some data from a bunch of sensors over a day. Once a day I want to sent this data via GSM to cosm.com or an other website. This should be a long term project over some month. There is no power nearby so I relay on batteries.
Have you any recommendation for GSM boards that (1) can be powered by battery, some manufacturer say explicitly on ebay you need a power supply because of peaks up to 2A if the shield is running (2) are there special shields / GSM modules who are extra power saving or that I can complete disable--I only need the GSM 1-2 minutes per day
There is a great page about saving power for the Arduino http://www.gammon.com.au/forum/?id=11497 Is there any comparable for GSM modules?
It is interesting that they do not recommend "normal" Arduino bards for power critical applications:
The initial outcome is that, to save power, forget about using a development board. Further savings (like reducing clock speed) would be overshadowed by the huge overhead of the voltage regulator and USB interface chip.
So I think this can be the same issue for GSM modules. I see on many boards voltage regulator and additional stuff so I doubt if it is a good idea to drive such modules by battery?