How to use the full screen size with the GxEPD library for E-PAPER displays

Other Hardware Displays
2

Your Arduino MEGA has not enough RAM to buffer the content of the whole screen. You need to use paged drawing. See example PagedDisplayExampleSmallRam.ino

Or you can use GxEPD2_AVR which does paged drawing using picture loop. See GxEPD2_AVR_Example.

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