_boot.py for Micropython on esp32 board

_boot.py

import gc
import uos
from flashbdev import bdev

from machine import Pin, Timer, Signal
from time import sleep_ms

# For ESP32-C3 LilyGo-T-OI-PLUS
LED_IN = Pin(3, Pin.OUT, 1)
LED_IN.off()

def flash(t=None):
    LED_IN.on()
    sleep_ms(150)
    LED_IN.off()

try:
    if bdev:
        uos.mount(bdev, "/")
except OSError:
    import inisetup

    vfs = inisetup.setup()

timer1 = Timer(0)
timer1.init(mode=Timer.PERIODIC, period=500, callback=flash)

print('\n\n')

try:
    import wifi_config
    import network

    sta_if = network.WLAN(network.STA_IF)
    sta_if.active(True)
    if not sta_if.isconnected():
        for ap in sta_if.scan():
            ssid = ap[0].decode('utf-8')
            # Trying connection with known access points...
            if ssid in wifi_config.aps:
                print('SSID for Wifi: %s' %(ssid,))
                sta_if.connect(ssid, wifi_config.aps[ssid])
                while sta_if.status() == network.STAT_CONNECTING:
                    print('.', end='')
                    sleep_ms(200)
                print('')

                if sta_if.isconnected():
                    ap_if = network.WLAN(network.AP_IF)
                    ap_if.active(False)
                    break

    if sta_if.isconnected():
        try:
            import uftpd
        except:
            sta_if.ifconfig()

        try:
            import ntptime
            ntptime.settime()
        except:
            pass
except:
    print('No Wifi setting found')
finally:
    timer1.deinit()

try:
    from upysh import *
except:
    pass

gc.collect()

wifi_config.py

# Put this file on your board after flashing, with ampy for example "ampy -p /dev/ttyUSB0 put wifi_config.py"
aps = {
    "GALAVEYSON": "my-secret-passord-1",
    "Redmi 7A":   "my-secret-passord-2",
}