Hi Enrico,

 > Anyway, I managed to solve the problem with a simple yet potentially
> dangerous fix: I deleted the if statement in the
> GSM_PERMISSIVE_STATE_RESPONSE_STRING case, so, it changed from:
>
> ​gatchat/gatsyntax.c (row 309 more or less)​
> case GSM_PERMISSIVE_STATE_RESPONSE_STRING:
>      if (byte == '"')
> syntax->state = GSM_PERMISSIVE_STATE_RESPONSE;
> break;​
>
> ​To:
>
> ​case GSM_PERMISSIVE_STATE_RESPONSE_STRING:
> syntax->state = GSM_PERMISSIVE_STATE_RESPONSE;
> break;​
>
> ​With this fix everything seem to work in my case.
> Do you think it is dangerous in any way?​

Yes.  This particular logic enables strings (e.g. text enclosed in 
quotes) to contain various special characters that would otherwise be 
interpreted differently.

It looks like you have an unterminated " in one of the AT command 
responses...

Regards,
-Denis