esp-idf/examples/system/deep_sleep

Example: deep sleep

This example illustrates usage of deep sleep mode and various wakeup sources.

The following wake up sources are configured:

• Timer: wake up the chip in 20 seconds
• EXT1: wake up the chip if any of the two buttons are pressed (GPIO25, GPIO26)
• Touch: wake up the chip if any of the touch pads are pressed (GPIO32, GPIO33)
• ULP: wake up when the chip temperature changes by more than ~5 degrees Celsius (this value hasn't been characterized exactly yet).