Sleep mode

[Luit]

How can I activate sleep mode, disable when input to GP1 and then go back into sleep mode?

This is my script:

import machine
import urequests
from machine import Pin


pressed = 0

def pincb(pin):
    global pressed
    pressed += 1


p_out = Pin('GP2', mode=Pin.OUT)
p_out.value(1)
pin_int = Pin('GP1', mode=Pin.IN, pull=Pin.PULL_UP)
pin_int.irq(trigger=Pin.IRQ_RISING, handler=pincb)

while True:
    if pressed > 0:
        url = "(my url)"
        params = { "test": "true" }
        urequests.urlopen(url, "GET", params)
        pressed = 0

Thank you very much!