Pyscan NFC/Rfid reading Issue

[SSerravezza SSerravezza]

Good evening,
I'm getting an Issue when trying to read a standard ISO 14443-3A tag.
I'm using attached main.py with latest MFRC630
I'm getting correct Uid but after authentication the tag return every block at ZERO.
The tag is properly written on sector 2 (see dump.png and is perfectly readable with a variety of tag readers.
Tried with Lopy and Wipy.. no way.
Any ideas?
Thanks.
Saverio

A card has been detected, reading its UID ...
UID has length 4
1       UID [4]: E6 51 3D 30 
        Sector 00 : Block: 00 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        Sector 00 : Block: 01 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        Sector 00 : Block: 02 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        Sector 00 : Block: 03 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        ________________________________
        Sector 01 : Block: 00 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        Sector 01 : Block: 01 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        Sector 01 : Block: 02 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        Sector 01 : Block: 03 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        ________________________________
        Sector 02 : Block: 00 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        Sector 02 : Block: 01 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        Sector 02 : Block: 02 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        Sector 02 : Block: 03 : 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 
        ............

[Gijs]

Hi,
Could you instantiate the MFRC card reader with the flag debug=True, this should give more debug output on what is actually happening. I was not able to find a readable card in the office at this time, so. I cannot check it for you right now.

[SSerravezza SSerravezza]

@Gijs Here the debug:
attached to pyscan_debug.py

[SSerravezza SSerravezza]

@Gijs here is the bug in MFRC630: you are printing the lenght of response instead of the value...

On line 374 it should be:

return dest

[Gijs]

Great work! I was indeed expecting the issue to be something like this, but had a hard time testing without a working sample. Let me know if that works for you, and I'll have it changed in the libraries!