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Even at the place where no available network access all over the world, your Monitoring system still works well with 3G dongle & International Data SIM card.
I write from now on how to set up an inexpensive 3G network environment on your RaspberryPi easily. USB 3G dongle and Data SIM card utilities "gc_modem" In General, a setting of USB 3G dongle and SIM Card is troublesome works with bizarre technical terms, like udev rule, apn, and so on.
The "gc_modem" is useful utilities to change there troublesome works mentioned above to just select the name of dongle and SIM card which you'll use.
gc_modem is consist of the following parts: udev_rules : Definitions of each USB 3G dongles which will be mentioned.wvdial : Definitions of each…