External wakeup with Arduino on ESP32-S3

#define BUTTON_PIN_BITMASK 0x200000000  // 2^33 in hex
#define INTERRUPT_PIN GPIO_NUM_2

#define LED 5  // or use LED_BUILTIN for on-board LED
RTC_DATA_ATTR int bootCount = 0;

void setup() {
  Serial.begin(115200);
  delay(1000);

  pinMode(LED, OUTPUT);
  digitalWrite(LED, LOW);

  ++bootCount;
  Serial.println("Boot number: " + String(bootCount));

  print_wakeup_reason();

  Serial.println("Going to blink the LED 10 times");
  blink(10);
  Serial.println("Going to sleep now");

  esp_sleep_enable_ext0_wakeup(INTERRUPT_PIN, 1);  // 1 = High, 0 = Low

  esp_deep_sleep_start();
  Serial.println("This will never be printed");
}

void loop() { }

void blink(int times) {
  for (int i = 0; i <= times; i++) {
    digitalWrite(LED, HIGH);
    delay(1000);

    digitalWrite(LED, LOW);
    delay(1000);
  }
}

void print_wakeup_reason() {
  esp_sleep_wakeup_cause_t wakeup_reason;

  wakeup_reason = esp_sleep_get_wakeup_cause();

  switch (wakeup_reason) {
    case ESP_SLEEP_WAKEUP_EXT0:
      Serial.println("Wakeup caused by external signal using RTC_IO");
      break;
    case ESP_SLEEP_WAKEUP_EXT1:
      Serial.println("Wakeup caused by external signal using RTC_CNTL");
      break;
    case ESP_SLEEP_WAKEUP_TIMER:
      Serial.println("Wakeup caused by timer");
      break;
    case ESP_SLEEP_WAKEUP_TOUCHPAD:
      Serial.println("Wakeup caused by touchpad");
      break;
    case ESP_SLEEP_WAKEUP_ULP:
      Serial.println("Wakeup caused by ULP program");
      break;
    default:
      Serial.printf("Wakeup was not caused by deep sleep: %d\n", wakeup_reason);
      break;
  }
}

BOARD?=esp32:esp32:esp32s3:CDCOnBoot=cdc
PORT?=/dev/cu.usbmodem14*
UART_PORT?=/dev/cu.usbserial-1*
BUILD=build
## Pass in V=--verbose to output more information than default

.PHONY: help default lint compile upload clean

default: clean lint compile upload

help: ## Show help message
	@awk 'BEGIN {FS = ":.*##"; printf "\nUsage:\n  make \033[36m\033[0m\n"} /^[$$()% 0-9a-zA-Z_-]+:.*?##/ { printf "  \033[36m%-15s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)

lint: ## Lint code using cpplint
	cpplint --extensions=ino --filter=-legal/copyright,-runtime/int *.ino

compile: ## Compile code and create the firmware binary
	arduino-cli compile $(V) --fqbn $(BOARD) --output-dir $(BUILD) ./

upload: ## Upload the firmware to the board
	arduino-cli upload $(V) --fqbn $(BOARD) --port $(PORT) --input-dir $(BUILD)

rollback:
	@echo "Ensure you plug into the UART port of ESP32-S3 board"
	esptool.py --port $(UART_PORT) erase_flash
	esptool.py --port $(UART_PORT) erase_flash
	@echo "Ensure flash in the blinky example of ESP-IDF before flashing in Arduino code"

clean: ## Remove all built files
	rm -rf build