![]() ESP32 DOIT DEVKIT V1 Board (read Best ESP32 development boards).To follow this tutorial, you need the following parts: You can also take a look at our ESP32 GPIO reference guide. The following figure shows the ESP32 pinout and its RTC GPIOs highlighted in light orange color (for the ESP32 V1 DOIT board). Note: with this wake up source, you can only use pins that are RTC GPIOs. ESP_EXT1_WAKEUP_ANY_HIGH: wake up if any of the GPIOs go high.ESP_EXT1_WAKEUP_ALL_LOW: wake up when all GPIOs go low.A bitmask of the GPIO numbers that will cause the wake up.To use this wake up source, you use the following function: esp_sleep_enable_ext1_wakeup(bitmask, mode) So, RTC peripherals and RTC memories can be powered off in this mode. This wake up source is implemented by the RTC controller. Wake up the ESP32 if all the pins you’ve selected are low.Wake up the ESP32 if any of the pins you’ve selected are high.You can use two different logic functions: This wake up source allows you to use multiple RTC GPIOs. This represents the state of the GPIO that will trigger wake up. The second argument, level, can be either 1 or 0. This function accepts as first argument the pin you want to use, in this format GPIO_NUM_X, in which X represents the GPIO number of that pin. To use this wake up source, you use the following function: esp_sleep_enable_ext0_wakeup(GPIO_NUM_X, level) So, RTC peripherals will be kept on during deep sleep if this wake up source is requested. The ext0 wake up source option uses RTC GPIOs to wake up. This wake up source allows you to use a pin to wake up the ESP32. You have two possibilities of external wake up: ext0, and ext1. This means that you can wake up the ESP32 by toggling the value of a signal on a pin, like the press of a button. Finally, you use the esp_deep_sleep_start() function to put your ESP32 into deep sleep mode.Įxternal wake up is one of ways to wake up the ESP32 from deep sleep.However, by default, the ESP32 automatically powers down the peripherals that are not needed with the wake up source you define. You can decide what peripherals to shut down or keep on during deep sleep.In this article, we’ll show you how to use the external wake up source. You can use one or combine more than one wake up source. This means configure what will wake up the ESP32. First, you need to configure the wake up sources. ![]() To write a sketch to put your ESP32 into deep sleep mode, and then wake it up, you need to keep in mind that: ESP32 Deep Sleep with Arduino IDE and Wake Up Sources.To learn more about deep sleep and other wake up sources, you can follow the next tutorials: identify which GPIO caused the wake up.wake up the ESP32 using several GPIOs using the ext1 method.wake up the ESP32 by changing the value of one GPIO (with a pushbutton) using the ext0 method. ![]()
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