Atmel AVR 8- and 32-bit MCUs deliver a unique combination of performance, power efficiency and design flexibility. Optimized to speed time to market-and easily adapt to new ones-they are based on the industrys most code-efficient architecture for C and assembly programming.
[env:stable]
platform = atmelavr
board = ...
...
[env:development]
platform = https://github.com/platformio/platform-atmelavr.git
board = ...
...
Please navigate to documentation.