WiFi reported error: no known networks found

[Raffa2s]

Hi,
In the last few days, I had tried to connect to my Duet2 wifi as always but I couldn't (server unreachable). I had tried to reset the firmware but nothing... How can I fix that?
Down below you can find the state of M587 and M552 S1, after that the error "WiFi reported error: no known networks found" even if the wifi is listed.

Send: M587
Recv: Remembered networks:
Recv: CASARAF IP=192.168.1.29 GW=0.0.0.0 NM=0.0.0.0
Recv: ok
[...]
Send: M552 S1
Recv: ok
[...]
Recv: WiFi reported error: no known networks found
Recv: WiFi module is idle

thank you

[jay_s_uk]

@raffa2s the SSID is case sensitive. Is your wifi network name all in capitals?
What terminal software did you use?

[Raffa2s]

@jay_s_uk I just write it right but it's appears like that, is it normal?
Octoprint as terminal was used

[jay_s_uk]

@raffa2s I believe octoprint capitalises every letter. So if you have anything lowercase in your password or SSID you need to use ' in front of each letter as described here https://duet3d.dozuki.com/Wiki/Gcode#Section_M587_Add_WiFi_host_network_to_remembered_list_or_list_remembered_networks
If you're reading the same network I suggest starting a fresh by deleting all known networks using M588 S"*"

[Raffa2s]

@jay_s_uk ok I try