ESP32 Deep Sleep Demo

You can watch a video walkthrough of this code here

Porting to another board

You will probably want to change this line:

#define BUTTON_GPIO GPIO_NUM_35

To match one of the buttons on your board.

Deep sleep using a timer to wake up

Make sure this is uncommented:

#define DEEP_SLEEP_TIMER

When you push the button, the ESP32 will enter deep sleep for 30 seconds.

Deep sleep using a single GPIO pin to wake up

Make sure this is uncommented:

#define DEEP_SLEEP_EXT0

The ESP32 will wake up when the button is pressed.

Deep sleep using multiple GPIO pins to wake up

There are two options here:

#define DEEP_SLEEP_EXT1_ANY_HIGH

This will wake the ESP32 if either pins 12 or 15 go high.

Or:

#define DEEP_SLEEP_EXT1_ALL_LOW

This will wake the ESP32 when both pins 12 and 15 are taken low.

Deep sleep using touch to wake up

Uncomment:

#define DEEP_SLEEP_TOUCH

The device will wake up when touch pin 9 is touched (GPIO 32). You can just connect a wire to pin 32 and when you touch the wire the device will wake up.