I have a device with an Ethernet connection that the user usually connects to ADSL router.
I'd like to offert a 4G connectivity too. I could replace the Ethernet adapter board with a 4G adapter board, but the effort is too high for us.
So I'm thinking to use a 4G router, that is similar to ADSL router, but has a 4G modem instead of ADSL model. There are many products available on the market.
However I'd like to embed a 4G router in my product for many reasons: better customer impression and the possibility to supply the router when the mains is absent (my product has an internal battery as a secondary power source).
So I'm searching for a small embeddable board that features a SIM holder, a 4G modem and 1 or 2 Ethernet ports. I will connect my Ethernet board to this 4G router. Do you know of something similar?
How difficult is to design this?