More extensive example in system/deep_sleep illustrates usage of various deep sleep wakeup triggers and ULP coprocessor programming.įollow us on Twitter and/or LinkedIn. Additionally it can disable all triggers if the argument is ESP_SLEEP_WAKEUP_ALL. This function deactivates trigger for the given wakeup source. Previously configured wakeup source can be disabled later using esp_sleep_disable_wakeup_source() API. Wake up sourcesĪfter putting the ESP32 into deep sleep mode, there are several ways to wake it up:Įsp_sleep_get_wakeup_cause() function can be used to check which wakeup source has triggered wakeup from sleep mode.įor touch pad and ext1 wakeup sources, it is possible to identify pin or touch pad which has caused wakeup using esp_sleep_get_touchpad_wakeup_status() and esp_sleep_get_ext1_wakeup_status() functions. Press question mark to learn the rest of the keyboard shortcuts. Im a programmer Press J to jump to the feed. It is also possible to go into deep sleep with no wakeup sources configured, in this case the chip will be in deep sleep mode indefinitely, until external reset is applied. Im using the above device and am looking to save power by entering deep sleep after idle and waking after tapping the display. Entering deep sleepĮsp_deep_sleep_start() function can be used to enter deep sleep once wakeup sources are configured. It is also possible to go into light sleep with no wakeup sources configured, in this case the chip will be in light sleep mode indefinitely, until external reset is applied. The only parts of the chip which can still be powered on are: RTC controller, RTC peripherals (including ULP coprocessor), and RTC memories (slow and fast).Įsp_light_sleep_start() function can be used to enter light sleep once wakeup sources are configured. To wake up from Deep Sleep there is a built-in timer that wakes you up after a period of time. In deep sleep mode, CPUs, most of the RAM, and all the digital peripherals which are clocked from APB_CLK are powered off. I have a simple sketch on an ESP32, which leaves one of its outputs on when it is in Deep Sleep mode and after a period of time the ESP32 exits Deep Sleep mode. Upon exit from light sleep, peripherals and CPUs resume operation, their internal state is preserved. In light sleep mode, digital peripherals, most of the RAM, and CPUs are clock-gated, and supply voltage is reduced. When ESP32 enters sleep mode, power is cut to any unneeded digital peripherals, while RAM receives just enough power to enable it to retain its data. What is sleep mode?ĮSP32 Sleep mode is a power-saving state that ESP32 can enter when not in use. Most ESP32 and ESP8266 board consume around 100 130uA. When the ePulse board is in deep sleep it only consumes between 25uA (at 3V3) and 35uA (at 12V).

2x STEMMA QT connectors, 1 on LDO1 and 1 on LDO2 21x GPIO. It’s really a great strategy for dramatically extending the battery life of a project that doesn’t need to be active all the time. LDO2 is user controlled & auto-shuts down in deep sleep. Power management gives a way to cut back ESP32’s power usage by leveraging one of its Sleep Modes. But if you are going to power your project by batteries, every mA counts. When your IoT project is powered by a plug in the wall, you tend not to care too much about power consumption.

Esp32 exit deepsleep