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 ... to find out the AVR chip inside.

A lot of people have used ESP8266 to add inexpensive WiFi connectivity to their projects, but [Oscar] decided to take it one step further and program ... Arduino’s bootloader. Once the hex file ...

[Chris] wrote us to share a neat technique he has been using to program ... generated hex file through a Java app he created, which converts the data into a WAV file. With the Arduino put into ...