I meanwhile managed to get screenshots from LCD modes 120x120 and 80x80, transferring them back to my PC and then converting them into PNGs.
The problem of getting screenshots from LCD modes 240x240 and 240x160 is still unsolved, though.
@Andreas_Rozek started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
I meanwhile managed to get screenshots from LCD modes 120x120 and 80x80, transferring them back to my PC and then converting them into PNGs.
The problem of getting screenshots from LCD modes 240x240 and 240x160 is still unsolved, though.