sleep() [ Sleep ]

ULTRA_LOW_POWER (SystemSleepMode)

SystemSleepMode::ULTRA_LOW_POWER, ULTRA_LOW_POWER, SystemSleepMode.ULTRA_LOW_POWER

// EXAMPLE
SystemSleepConfiguration config;
config.mode(SystemSleepMode::ULTRA_LOW_POWER)
      .gpio(D2, FALLING);
System.sleep(config);

Since 2.0.0:

The SystemSleepMode::ULTRA_LOW_POWER mode is similar to STOP mode however internal peripherals such as GPIO, UART, ADC, and DAC are turned off. Like STOP mode, the RTC continues to run but since many more peripherals are disabled, the current used is closer to HIBERNATE. It is available in Device OS 2.0.0 and later.

In this mode:

• Real-time clock (RTC) is kept running.
• Network is kept on if used as a wake-up source (Gen 3 devices only).
• BLE is kept on if used as a wake-up source (Gen 3 devices only).
• GPIO, UART, ADC are only kept on if used as a wake-up source.
• GPIO are kept on; OUTPUT pins retain their HIGH or LOW voltage level during sleep.
• Can wake from: Time or GPIO. On Gen 3 also analog, serial, BLE, and network.
• On wake, execution continues after the the System.sleep() command with all local and global variables intact.

Typical power consumption in ultra-low power (ULP) sleep mode, based on the wakeup source:

Cellular Devices (B Series SoM, Tracker SoM, Tracker One, Boron, E404X, E Series, and Electron):