@JonB This is the link to my github code, sorry it's very messy:
https://github.com/HenningTm/drawing_touchpad
The .xlsx file in the repository contains the point coordinates for the shape and is redrawn in lines 474-489.

Works perfectly, thanks!

you have to thin out your points... one way would be to filter data in touch_moved to only register motions larger than X pixels, or that occur after a long delay. then you would use a bezier arc to connect.

you have to compute the control points yourself, which may be non trivial.

You are right, the problem was, that I drew each little line as a path individually. Now that I create one big path and draw it once, it works. Thanks!

Hey,
There are many other ways to send data to your pc, the one I particularly prefer is uploading the data to a drive and downloading it on the required device. You may also try FTP server. However, the easiest method would be to use different applications that send songs, images to devices using wifi like ShareIt. You could also use the inbuilt bluetooth in your devices, if it is available. Try transferring https://sc-downloader.net/ songs with above mentioned ways to know which one is best suited for your device.

For what it's worth, one of my many abandoned projects, a "pen tool"
https://gist.github.com/2d9e24f31f471f629d56912ead624538

That looks perfect. Thanks a lot!