[GreenKeys] Touch screen green keys?

[Joe Duszyński]

I did something similar to this with arduino (ESP32) and a 7" TFT
touch screen, it just bitbanged one pin on the arduino.
And all the libraries (Keyboardl, Touch screen are available online)
You could easily change the keyboard keys to anything your heart
desired and add sound ect.




On Mon, Feb 3, 2025 at 9:31 AM Duncan Brown <duncanancy at earthlink.net> wrote:
>
> Steve,
>
> If your touch screen just generated the 5 bit code (with start & stop bits) and outputed it as serial data, you could drive an optocoupler in series with the loop.  Then your M15 would type directly from your keyboard.
>
> Have fun,
>
> Duncan
> K2OEQ
>
> On 2/3/2025 8:50 AM, steve bennett via GreenKeys wrote:
>
> GKs,
>
>   Before I reinvent the wheel I thought I'd reach out and ask if anyone has already done this.
> Since my M15 is read only (no keyboard) I was thinking of using an old tablet or Android as a virtual keyboard.
> For simplicity I was thinking of implementing this in some sort of client side mobile code like  javascript
> and HTML.
> Say for example take an image of a vintage green keyboard and slice it up into javascript buttons.
> The idea is when you touch (or click) a button it triggers an audio sample of the AFSK for that character
> and the sound output of your device is plugged into your TU.
> (Yes I know I could use FLDIGI but I want to use a graphic key board with green keys)
>
> As a proof of concept I have already generated the necessary audio files and tested it with my android phone.
> On the Android plugged into a TU170 if I play A.WAV the machine prints an A, so on and so forth......
> Works great but it is tedious to scroll through a list of audio files to find the letter you are looking for.
>
> Any thoughts?
> Surely there is HTML and Javascript already out there somewhere that just needs adapted to this purpose.
> A keyboard input being such a universal and fundamental widget there has to be one out there I could just download.
> No need to write it from scratch.
>
> -Steve
>
>
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