Hardware Block Diagram
As the system is designed to use low-cost existing hardware, the hardware layout is fairly straight forward. Main challenges will be arranging it into a neat space and portability.
The flow from left to right shows two antennas for the 4G LTE modem which is ideal for the modem which we have installed and performs diversity function for the modem. Data from the modem is passed to the router section via the application processor which is running OpenWRT. This application processor is chiefly responsible for most of software, everything except that which I refer as the "back end" which will be handled as a web service. It's possible this service could be handled via an on-board computer (shown at bottom), even one as simple as a Raspberry Pi, but I don't think the router is capable of handling it along with all its other router duties. As the network traffic is routed to the right, the WiFi 802.11ac router communicates with client devices.
Final version ideally should have an on-board battery bank, but I haven't implemented this feature yet. Bit of a short post on this subject, but it's pretty simple from a high level perspective.
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