This program tests commands from the Serial and Button to control 2 LED and a 5V Relay Module (jqc3f-5vdc-c). #include <Arduino.h> /* Commands a: change LED1 s: change LED2 r: change relay d: change ...

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 ...