I am currently utilizing a TP-Link
TL-WR710N updated with most current version of OpenWRT.
Concurrent with said endeavor have purchased and played with larger AP combo cellular modems.
Some of the larger combo/AP/modem devices still are in their boxes as they were just too large for me.
Favorite larger boxes are the
Ericsson modems (well they have now quit doing this) and NexusIsr.
They all work but are much larger than the TP-Link.
Favorite one has multiple means of transport plus dual celluar connections and GPS and is portable and utilized for emergency stuff. (you can triangulate it's positioning using telco and GPS).
My TP-Link has 8 MB of flash memory and 32 MB of RAM memory.
I wanted two NICs such is the reason that I purchased this model.
It works fine with commonly used 3G/4G USB modems. (the device talks wired via 2 NICs, wireless (off right now) and serially via USB ports on it.
The device though clocks at 400Mhz and doesn't really have that much play space in it.
I have kept it updated and it's been working fine powered from my OmniPro II panel.
It is connected via the OmniPro II NIC and one serial port (for play) these days.
BusyBox v1.23.2 (2015-04-08 12:11:09 UTC) built-in shell (ash)
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| - || _ | -__| || | | || _|| _|
|_______|| __|_____|__|__||________||__| |____|
|__| W I R E L E S S F R E E D O M
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CHAOS CALMER (
Bleeding Edge, r45306)
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* 1 1/2 oz Gin Shake with a glassful
* 1/4 oz Triple Sec of broken ice and pour
* 3/4 oz Lime Juice unstrained into a goblet.
* 1 1/2 oz Orange Juice
* 1 tsp. Grenadine Syrup
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ICS-TPLink-MR:~#
I have purchased a daughter board for it but yet have not connected it. The daughter board adds more USB ports and an easy way to get to the GPIO stuff. I was looking to install an RTC battery clock on it. I want to fit everything though in as little space as possible as today the device is sitting inside of my OmniPro II can (and that is full of stuff today).
The direction here with the board is to make it a miniature combo utility device for the OmniPro II panel. I can do stuff with the serial port connection or the network connection. It does email / text just fine. I have been able to build basic status LuCi pages with it which is a good thing.
Other folks have added an RPi2 / Arduino mix for automation using these microrouters.