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The ESP32 is a popular microcontroller and find itself being utilized in many projects. Some projects however can really use more display real estate than available on inexpensive color LCD/TFT displays. Maybe a dual-display will be of interest especially is the display is provided by two of the hardware SPI interfaces in the ESP32: VSPI and HSPI. This project can be the launching pad for your own dual screen designs.
Wiring is shown in the chart below. Note that "-1" represent signals that are not connected.
I used ArduinoIDE 1.8.13 for Linux. My ESP32 development board is the WROOM-32 version although many development boards should be capable: just check the signals to ensure they are routed to the development board edges.
For this sample project, all of the required Adafruit LCD code is encapsulated into the ZIP file you will download. Simply decompress the ZIP and open the "ESP32_HSPI_VSPI_ILI9341_OK.ino file in the IDE. Library code will be shown in the ArduinoIDE tabs.
Below is shown the Tools/Options I used to compile:
As always, have fun.