I am running MicroPython v1.20.0 on 2023-04-26; ESP module with ESP8266

I put the following code in boot.py and nothing in main.py:

from debugfun import breakpoint, vars
print("Activating network")
import network
wlan = network.WLAN(network.STA_IF)
wlan.active(True)
wlan.connect('ssid', 'password')

if my router power off when esp8266 connected, Then the esp8266 will create a new access point with the same ssid and password as my router. It's DHCP is 192168.4.*.

It will prevent the other devices to reconnect to the router.