I bought the 3.5inch screen to display QR codes, for use at a dentistry reception, so that clients can scan their next appointment into their phone.
How can I programatically access the screen? I realise you are using a COM port driver. Can you please give me code / or the details of the protocol so that I can display a QR code. I'll probably be doing my code in C# or C++. But, any language would be ok. I could convert it.
Whatever code or protocol information you have would be much appreciated.