Uff... Interesting... I think i found the Problem.

I connected with following Serial parameters:
115200 baud, 7, even, 1, hardware flow control

The Connection works and i get readable answers and commands work.
But not the M587 containing a hypen.

When connecting with parameters like YAT on windows uses, the command works.
Used: 9600baud, 8,None, 1, no flow control)

wow... i tested screen, moserial, putty, picocom and other terminals on linux...
even YAT on wine.

everywhere the same problem.

When using a "native" windows Laptop and YAT i can save the network.

M587 S"mainframe-legacy" P"WIFIpass"
ok
M587
Remembered networks:
mainframe-legacy IP=0.0.0.0 GW=0.0.0.0 NM=0.0.0.0

Thank you!

Hey!
i struggle setting up an wifi Connection as the SSID name contains an -.
I am using linux to get the serial connection. When testing without the -, the connection is saved.

When i send:

M587 S"mainframe-legacy" P"WIFIpassword"

(there is no SPACE in SSID, only CODE-Tag adds it... Wifi name is mainframe-legacy)

it returns:

M587: Bad or missing parameter
ok

Can you help me to escape the - please?

Thanks in advance, hurr1k4ne