External mifare and MFStandardConnection increment method issue

[pawangjain]

Hi all

I am developing an app to connect to an external mifare card using nokia 6131nfc and manipulate the value on one of the value blocks of the ext mifare card

i am able to connect and read the contents of an external mifare card using the MFStandardConnection when i run the midlet on an emulator of nokia6131 sdk v1.1 with an omnikey reader..(since my mobile's firmware is old v3.12 i am not able to test the app on the phone itself)

This is how i do

conn = (MFStandardConnection)Connector.open(connUrl);

where connUrl is got from target properties when the target is detected..

I am able to read the data of the binary blocks and the value from the value blocks
How ever i am facing a problem with the MFBlock class' increment() method when i increment a value block


I get the following message and the emulator closes abruptly

value = 100
ALERT: java/lang/NoSuchMethodError: No such method increment.(Lcom/nokia/nfc/nxp/mfstd/MFKey;J)I.

similar is the case with the decrement() method

Has anyone ever come across such an issue or is there some problem with the emulator


Thank you

[alixwarnke]

I'm not sure, but I believe you have to format the MIFARE card to use MF Value blocks instead of the standard ones to be able to do increment/decrement. Maybe you have to set that up in the general purpose byte or something.

[kollyhood]

Hi,
I do not know how to post a new discussion, I am sorry for highjacking this thread.
I was trying the mifare examples in the 6212 sdk. One of the samples increments the mifare value block, everything works fine but the only problem is I am not able to increment the value beyond 800 the value returned goes into (-) negative.
Any Idea how I can store and operate value more than 10000. Thanks - ann