ESP32_WakeupOnLow.ino

// Example to enter deep sleep after 10 seconds and wake up with a GPIO pin
void setup() {
    // Initialize Serial for debugging
    Serial.begin(115200);
    delay(1000);  // Wait for the serial to initialize

    // Set GPIO pin for wakeup
    esp_sleep_enable_ext0_wakeup(GPIO_NUM_0, 0);  // Wake on low signal on GPIO 0

    // Start deep sleep
    Serial.println("Entering deep sleep mode in 10 seconds...");
    delay(10000);  // Wait 10 seconds
    esp_deep_sleep_start();  // Enter deep sleep mode
}

void loop() {
    // The device will never reach here as it goes into deep sleep
}