Widora Air firmware upgrade help

how can I download / flash OpenWRT firmware in an Widora-Air module, in windows, can I do it with flash download tool ?
I need that because I try it wifi scan example written with Arduino, and now I need to revert…

oh,it’s esp32!
enter the esp-idf exampler folder,use the command:“make flash”

I made a terminal connection, but don’t know to make the next step.
I not have web acces :frowning:
this is the message:

waiting for download

@mango Thank you !

you can use the web upgrade in uboot
please see: http://wiki.widora.cn/doku.php?id=zh:webupdate
Prepare a debug serial port and a cable