[chbot] Help with a B4A serial over USB project

[Charles Manning]

Hi Mark

I do not have any B4A skills, but this might help you find the right
direction:

https://www.b4x.com/android/forum/threads/usbserial-with-multiple-unknown-vid-pid.121048/


On Fri, May 9, 2025 at 8:13 AM Mark Atherton <markaren1 at xtra.co.nz> wrote:

> 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
>
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