The python script begins streaming a hex file over WiFi to the ESP8226, which relays it to the Arduino’s bootloader. Once the hex file is streamed, the microcontroller seamlessly starts ...

You don’t have to use the built-in IDE. You can simply right click on the processor and upload a hex file. Recent Arduino IDEs have an option to export a hex file, and that works with no problem.

At the heart of the Arduino platform is an AVR microcontroller, in usual way you need a special hardware programmer and suitable hex files to program the Atmel AVR chip. Fortunately, Arduino is a ...