In the first part of this article we managed to put the AVR into power-down mode and were thereby able to lower the current consumption in idle mode to 0.0 mA. While this is great compared to the 22 mA before any optimization, there is no way to wake up the controller yet to do some actual work. This is what we're going to do in this episode.

This post has moved to my new blog: [deardevices.com](https://deardevices.com/2017/12/03/avr-sleep-mode-for-fun-and-profit-part-2/)! [![Dear Devices](https://steffen.ronalter.de/assets/deardevices.png)](https://deardevices.com/2017/12/03/avr-sleep-mode-for-fun-and-profit-part-2/)