import machine
from machine import TouchPad, Pin
import esp32

sw = Pin(33, Pin.IN, Pin.PULL_UP)  # GPIO33̃vAbvL    
esp32.wake_on_ext0(sw,  esp32.WAKEUP_ALL_LOW)
print("start to sleep(1min)")
machine.lightsleep(60*1000)  #  timer wake at 1min
print("wake up from sleep")
print_wakeup_reason()
