how to write key A and Key B onto WS1850S

[huanfai]

I recently get a M5 Dial V1.1 and I have card with mifare 1k card encrypted with known key A/B and read data from block 1.
I used to work with Arduino and rc522 and it works fine.
Now I tried to migrate my project to M5 Dial and a had some problems on writing authentication keys on WS1850S and get feedback of authentication status.
in UIFlow 2's RFID instruction didn't mention about the encryption things.

[felmue]

Hello @huanfai

looking at the soucre code for UIFlow2 device firmware I think authentication keys are fixed to default values. See here and here.

In ohter words I don't think the RFID blocks in UIFlow2 can handle anything different than default authentication keys.

Thanks
Felix

[peolsolutions]

To write Key A and Key B onto a WS1850S, connect the device to your PC and use compatible software. Place the MIFARE card on the reader, authenticate the target sector using the default key, and access the sector trailer block. Input your new Key A, access bits, and Key B in the correct format. Write the data, verify authentication with new keys, and ensure access settings are not misconfigured.