Wireless solution for microcontroller project

[DeathPheonix]

I'm looking into a wireless solution for my project. Previously we were thinking using an LTE radio for our microcontroller (STM32 based micro, haven't choose which one yet) and we found that LTE is a pain to work around with micros, then we were thinking using just GSM network. However we would like to be able to stream something better than 320P@10FPS through this wireless connection. The project is meant to be deployed where wifi does not exist and should have a relatively far communication range. So I was wondering if there exists something like a bare-bone LTE to wifi board that I can power with a battery and provide wifi signal for my micro and for video streaming. I know that there exists a lot of commercial products that can achieve this, but the thing is those commercial product tend to come with a case and built-in power supply. I would want something without a case and power-supply so I can easily incorporate them in my project. 

[DeathPheonix]

3 hours ago, James Evens said:

One off or small production run?

One off prototype. Won't be considering production but would help if we can reliably source that part.

[DeathPheonix]

1 hour ago, James Evens said:

Buy a prebuild lte to wifi. Remove the case and hook them up to the same battery the micro will use. If you want to spend some more time you could also remove the power delivery and use your own power delivery. Since you need a fast mcu why not use cortex-A (for example pi zero w) and a usb 4g dongle?

Other options would be to open mouser and search for dev boards. You will find more then one for example from seedstudio one based around the LARA-R200 series.

We are limited to use micros only and have to write bulk of the firmware and software interface. Pretty sure that a pi zero w does not qualify