Take the ESP32-CAM, a board that started appearing ... pins of the camera board so that programs can be uploaded from the Arduino IDE when the reset button is pressed. None of that is terribly ...

The SPI routines in the ESP32 Arduino port both work just fine ... There were also two extra definitions that I had to add to the program to make it run, but they’ve both been streamlined ...

Thanks to their low power consumption, inexpensive price tags, and multiple I/O options, ESP32, Arduino, and other microcontroller ... as it lets you program the microcontroller from a web UI.