[chbot] Help with a B4A serial over USB project

[Mark Atherton]

Hi All,

Just wondering if someone with B4A skills could help me with some demo code.

I need a very simple and complete B4A project that will run on an 
Android tablet with OTG and connect to a CH340 USB/serial bridge.

The app needs a button that will send 'L' to the CH340 when pressed. It 
would also be useful to have a small area which displays incoming 
characters from the CH340. Port is configured at 57.6k, N, 8, 1.

Overall project is educational/non-commercial, and will become 
open-source in due course with appropriate credits.

Many thanks,

Mark