Cf. https://www.olimex.com/wiki/MOD-RFID1356MIFARE, the default key is FF:FF:FF:FF:FF:FF:FF:FF.
How can I change it with a custom value?
Many thanks.
Thank you for the post.
The initial firmware of MOD-RFID1356MIFARE lacked such a feature. It has been added in the newest firmware that is out now. Follow the information at the wiki article for more details on how to upgrade the firmware and how to use the new functions: https://www.olimex.com/wiki/MOD-RFID1356MIFARE
Best regards,
Lub/OLIMEX