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 ...

ESP8266 read and write a text file by: martinayotte and Steve Nelson (it was mostly Martin! I just documented it) This will read and write a file to the SPIFFS file system. This particular example ...