import uos import network from flashbdev import bdev def wifi(): import ubinascii ap_if = network.WLAN(network.AP_IF) essid = b"MicroPython-%s" % ubinascii.hexlify(ap_if.mac()[-3:]) ap_if.config(essid=essid, authmode=network.AUTH_WPA_WPA2_PSK, password=b"micropythoN") def check_bootsec(): buf = bytearray(bdev.SEC_SIZE) bdev.readblocks(0, buf) empty = True for b in buf: if b != 0xff: empty = False break if empty: return True fs_corrupted() def fs_corrupted(): import time while 1: print("""\ FAT filesystem appears to be corrupted. If you had important data there, you may want to make a flash snapshot to try to recover it. Otherwise, perform factory reprogramming of MicroPython firmware (completely erase flash, followed by firmware programming). """) time.sleep(3) def setup(): check_bootsec() print("Performing initial setup") wifi() uos.VfsFat.mkfs(bdev) vfs = uos.VfsFat(bdev, "") with open("/boot.py", "w") as f: f.write("""\ # This file is executed on every boot (including wake-boot from deepsleep) import webrepl webrepl.start() """) return vfs