Once the pin transitions into the state given by level argument, the chip will be woken up. This feature can monitor any pin which is an RTC IO. It will work only if RTC peripherals are kept on during sleep. This function uses external wakeup feature of RTC_IO peripheral. Gpio_num: Number of the GPIO to test for wakeup source capabilityĮsp_err_t esp_sleep_enable_ext0_wakeup ( gpio_num_t gpio_num, int level ) ¶ True if this GPIO number will be accepted as a sleep wakeup source. Returns true if a GPIO number is valid for use as wakeup source.įor SoCs with RTC IO capability, this can be any valid RTC IO input pin. Touch pad which caused wakeup bool esp_sleep_is_valid_wakeup_gpio ( gpio_num_t gpio_num ) ¶ If wakeup was caused by another source, this function will return TOUCH_PAD_MAX Touch_pad_t esp_sleep_get_touchpad_wakeup_status (void ) ¶ ReturnĮSP_ERR_INVALID_STATE if wakeup triggers conflict The FSM mode of the touch button should be configured as the timer trigger mode. In revisions 0 and 1 of the ESP32, touch wakeup source can not be used when RTC_PERIPH power domain is forced to be powered on (ESP_PD_OPTION_ON) or when ext0 wakeup source is used. Time_in_us: time before wakeup, in microsecondsĮsp_err_t esp_sleep_enable_touchpad_wakeup (void ) ¶ ReturnĮSP_ERR_NOT_SUPPORTED if additional current by touch (CONFIG_ESP32_RTC_EXT_CRYST_ADDIT_CURRENT) is enabled.ĮSP_ERR_INVALID_STATE if ULP co-processor is not enabled or if wakeup triggers conflictĮsp_err_t esp_sleep_enable_timer_wakeup (uint64_t time_in_us ) ¶ĮSP_ERR_INVALID_ARG if value is out of range (TBD) In revisions 0 and 1 of the ESP32, ULP wakeup source cannot be used when RTC_PERIPH power domain is forced to be powered on (ESP_PD_OPTION_ON) or when ext0 wakeup source is used. Source: - number of source to disable of type esp_sleep_source_tĮsp_err_t esp_sleep_enable_ulp_wakeup (void ) ¶
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It will be performed in esp_sleep_start function.ĮSP_ERR_INVALID_STATE if trigger was not active This function does not modify wake up configuration in RTC. This function is used to deactivate wake up trigger for source defined as parameter of the function. This will allow the system to wake up from sleep automatically when required by WiFi driver, thereby maintaining connection to the AP.įunctions ¶ esp_err_t esp_sleep_disable_wakeup_source ( esp_sleep_source_t source ) ¶ If WiFi connection needs to be maintained, enable WiFi modem sleep, and enable automatic light sleep feature (see Power Management APIs). At this point the hardware will be configured according to the requested wakeup sources, and RTC controller will either power down or power off the CPUs and digital peripherals. Once wakeup sources are configured, application can enter sleep mode using esp_light_sleep_start() or esp_deep_sleep_start() APIs. Wakeup sources can be configured at any moment before entering light or deep sleep mode.Īdditionally, the application can force specific powerdown modes for the RTC peripherals and RTC memories using esp_sleep_pd_config() API. Next section describes these APIs in detail.
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Wakeup sources can be enabled using esp_sleep_enable_X_wakeup APIs and can be disabled using esp_sleep_disable_wakeup_source() API. These sources can be combined, in this case the chip will wake up when any one of the sources is triggered. Wakeup from deep and light sleep modes can be done using several sources.