Cannot connect after update to 1.20

[fpex]

I have upgraded via the SD, since it was a very old firmware. This first M997 S0 and then M997 S1 from pronterface.
The net result is that now the board no longer connects to a WIFI.
I followed the steps as form the guide

M552 S0
M587 S"ssid" P"passed"

But it does not work. It seems that the board makes all I give as ssid/psswd uppercase and of course it does not work.
The AP also iOS no longer working, therefore M552 S1 results in no known networks and no more AP.

If I try to reinstall the firmware, it simply deletes the bin file and claims it is not there.

I am kind of lost. Any help is welcome.
Thanks

[dc42]

To avoid the SSID and password getting converted to uppercase, use a terminal emulator to connect to USB instead of a 3D printer host program. See https://duet3d.com/wiki/Getting_connected_to_the_Duet_WiFi#Connecting_to_your_access_point_using_firmware_1.19_or_later.

[fpex]

How do I remove all the wrong upped networks?

[Dougal1957]

M588 * will nuke them all

http://reprap.org/wiki/Gcodes#M588:_Forget_WiFi_host_network

[dc42]

To be precise:

M588 S"*"

[fpex]

thanks
I managed to get it connected but the web interface is gone, I get a black page on safari and cannot connect on chrome using the IP I retrieve

[dc42]

Did you put the DWC files in the right place on the SD card?