In this video:

• Revisit AVR^® Libc support for sleep.
• Disable the Brown-out detector when sleeping.
• Provide an overview of the solution project to AVR hands-on megaAVR^® picoPower^® which uses a very similar application to the one we have developed.
• Explore the techniques used to save power:
  1. GPIO set as inputs with pull-ups enabled.
  2. Use the Power Reduction register to turn off the clocks to unused peripherals.
  3. Use the Asynchronous Timer-Counter 2 which can be clocked directly from an Real Time Clock (RTC).
• Set the Sleep mode to Power-Save mode.
• In the while loop, if the send flag is set after sending the USART string, putting the AVR MCU to sleep.