Deep sleep Beetle RP2350 Arduino

try this code：

#include "pico/sleep.h"
#include "pico/runtime.h"
#include "hardware/rtc.h"

const int WAKE_PIN = 10; // The GPIO used to wake the device

void setup() {
 Serial.begin(115200);
 pinMode(WAKE_PIN, INPUT_PULLUP);
 pinMode(LED_BUILTIN, OUTPUT);
}

void loop() {
 digitalWrite(LED_BUILTIN, HIGH);
 delay(2000);
 digitalWrite(LED_BUILTIN, LOW);

 Serial.println("Entering Sleep Mode... Pull GPIO 10 to Ground to wake.");
 Serial.flush(); // Ensure serial buffer is empty before sleeping

 // Function to handle the sleep logic
 sleep_goto_dormant_until_pin_low(WAKE_PIN);

 // Execution resumes here after waking up
 Serial.println("Woken up!");
}

void sleep_goto_dormant_until_pin_low(uint gpio) {
   // Configure the GPIO to wake the processor
   // This is a simplified representation of the SDK call
   sleep_run_from_xosc(); // Switch to the crystal oscillator
   sleep_goto_dormant_until_edge_high(gpio); 
}