I tried Google, I tried a bunch of forums and I searched here. This question needs a final answer:
Which GSM-shield is most efficient for GPRS communication?
Since Arduino is the amateurs best friend for home automation and IoT, an "efficient" shield has a very low power consumption.
I am currently developing a system that collects some data from different sensors at a place far, far away, with limited access to power (e.g. it has a very small solar panel and a battery). It is also in pocket-size which makes a car battery a bad option.
Anyway, this specific device reads these sensors every 20 minutes, and if there's a deviation since the previous reading it starts the GSM module to send the new data to my API.
SMS and call features are of absolutely no interest at all.
Since these GSM-power-absorbing-current-eating-devils really like power I must think outside the box and compare different alternatives. So besides the primary question in this post, is there any way you can limit the power consumed, for example by limit the connection speed or anything like that? I'm using a M590 module at the moment, and that beast can eat around 2A if it's hungry.
Thanks in advance :)