Bluetooth hardware cable

[jhartl...@gmail.com]

Hi,

I am looking into making a Bluetooth cable, hard-wired into the diag socket on my discovery. The Bluetooth TTY is easy, it is the inverting of the RxD pin using hardware that is the question as my preferred TTY unit is fully automatic but non programmable.

Will a simple single inverter gate be enough, such as the 74AHCT1G04 from NXP(TTL level single input single output inverter on a chip), as long as it is done after resistor, so the signal is at TTL level and not 12V?

My bluetooth TTY adapter takes all the common TTY inputs and will run from a varied DC source, so a small 12v-5v converter will be used to keep things simple. 

I have a Toughbook CF-H1 medical grade tablet, which is drop proof(up to a metre) and splash proof to mil spec. :) so bluetooth would mean I could have this away from a fixed USB.

Thanks in advance,

James