ESP8266 Community Forum

Thanks for the tip, but I think that it's more likely an issue in the ESP8266WiFi library, it populates the access point config struct with a dangerous cast:



It makes the same type of cast with the password and sure enough, passwords with _s also seem to cause issues. So I'd guess that it might be an issue with the Arduino IDE project.

I'm not following you ...
do you means this cast is causing problem only with ssid/pw that contains underscores ?
I have doubt on that.
It is probably an Expresiff bug that doesn't under underscores.
It is like that 8 character requirement for password : not other APs have such requirements.

I guess that's a possibility. I don't have any other toolchains set up, so I can't check whether it just happens in the Arduino IDE or not at the moment, but I'll see if I can reproduce it just using AT commands.

Edit: Sadl- er, happily, I was able to connect normally to an access point including '_'s - including the same ssid/password that was failing before - when I used firmware commands to set it up. So it looks like this isn't an issue in Espressif's software.

martinayotte wrote:It is like that 8 character requirement for password : not other APs have such requirements. ;)

That's not a bug, it's compliance with the standard. WPA passphrases may have 8-63 characters. If your AP allows you to set a shorter passphrase, you have a buggy AP.