What are the possibilities of getting a screen that would allow a direct connection to an RS-232 instead of Bluetooth? To use something like this?
rammount.com

The ability to charge the tablet with the stability of a wired RS-232?

GDS® Hardwire Charger with mUSB Plug and Serial Adapter
Leveraging the USB 2.0 OTG mode, the RAM-GDS-CHARGE-RS232U adapter combines two functions that are critical to enabling ELD and telematics solutions with commercially available tablet form factors. The ability to charge a host device ¬– that supports the OTG embedded (FTDI and Prolific) drivers...


The ability to charge the tablet with the stability of a wired RS-232?