Форум HARDUINO

Hi, I want to buy a key for a ATS25X1 with firmware version 4.2 air beta. I live in France. Who can sell me this ? Thank you

Do you know how to go back to stock on this? something went wrong with the update

you can flash another firmware with the arduino IDE or ESP32 dowload tool :

try with version 4.0 by Bernard Binns :
https://www.qsl.net/n9ewo/ats25.html