With some AT-1 updates, the WiFi module itself is also updated.
If no WiFi appears after the update and the AT_INFO.log file does not contain anything else under "WIFISWVER=" the software for the WiFi module has not yet been installed correctly. As a result, the module cannot work, and no WiFi network appears.
Please restart the AT-1 several times and always wait approx. 3-5 minutes. The WiFi module update is restarted each time the AT-1 is started. This usually resolves the problem entirely after a few attempts.
The USB drive is no longer required. If you do not insert the USB drive into the AT-1, the update process is faster as no file synchronization has to be performed.