Optiboot (an older version) is installed by default on the Arduino Uno and (as of 2018) official Arduino Nano boards. It can be installed on all older mega8, 168 or 328 based Arduinos. As of 2019, ...

This repository contains the scripts that produce the libraries included with esp32-arduino. Tested on Ubuntu (32 and 64 bit), Raspberry Pi and MacOS. Install the ...