<div dir="ltr"><div>Hi Mark</div><div><br></div><div>I do not have any B4A skills, but this might help you find the right direction:<br><br><a href="https://www.b4x.com/android/forum/threads/usbserial-with-multiple-unknown-vid-pid.121048/">https://www.b4x.com/android/forum/threads/usbserial-with-multiple-unknown-vid-pid.121048/</a><br><br></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Fri, May 9, 2025 at 8:13 AM Mark Atherton <<a href="mailto:markaren1@xtra.co.nz">markaren1@xtra.co.nz</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi All,<br>
<br>
Just wondering if someone with B4A skills could help me with some demo code.<br>
<br>
I need a very simple and complete B4A project that will run on an <br>
Android tablet with OTG and connect to a CH340 USB/serial bridge.<br>
<br>
The app needs a button that will send 'L' to the CH340 when pressed. It <br>
would also be useful to have a small area which displays incoming <br>
characters from the CH340. Port is configured at 57.6k, N, 8, 1.<br>
<br>
Overall project is educational/non-commercial, and will become <br>
open-source in due course with appropriate credits.<br>
<br>
Many thanks,<br>
<br>
Mark<br>
<br>
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