https://simcom.ee/modules/wcdma-hspa/sim5360/,
a multi-band 3G modem with GPS and Glonass; USB, UART, I2C and
SPI interfaces; a handful of GPIO lines ...
... and "LUA Script Language" (sic).
It appears that the host can either control the numerous
features of the modem by sending AT commands to the device, or
can download a Lua script to the device so that it does all
the clever stuff itself, so the host does not have to be
involved.
Now to find a way to talk to it from a Linux device (Beagle
Bone Black) rather than using the Windows-only tools... Linux
modem-manager does all the right stuff to make a cellular
conne ction and send and receive texts, but it is not obvious
how to download and compile the Lua scripts.
Stephen Irons