![]() Because the file size of a 240*240 color bitmap is way too large to fit program memory in an Arduino Uno we are using an ESP32 microcontroller board: ESP32-WROOM-32. The screen used is a 1.3 inch, 240*240 pixel TFT display with ST7789 controller and SPI interface. ![]() In the present project we convert a color picture into a c-array that is either included in a sketch or saved in a file that is called from within a sketch. Several ways exist to display bitmap images, pictures so to say, on a screen attached to an Arduino, ESP8266 or ESP32.
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