A simple example project for SPI OLED displays commonly used on Arduino that shows the room temperature and a connected computer's IP if the computer is running the provided server, written in Python.

To prevent data corruption when using multiple SPI devices on the same bus, care must be taken to ensure that they are only accessed from within the main loop, or from the interrupt routine, never … ...

Run in the Arduino IDE the HelloWorld example with an ili9488 in SPI. In fact, you don't need an ili display to try this, because it fails at compile time. The possible wiring errors, are irrelevant ...