JavaCard: how to send data to outside?

Question

JavaScript

I am developing an applet on JavaCard (while in the jcardsim.org emulator).
I have data in the form of a string (byte array) that I have collected in the application code.
And now I want to send to my server in any available way (except SMS).
Is it possible to open a socket (tcp, udp) ?
Looked around www.oracle.com/technetwork/java/embedded/javacard /... , www.win.tue.nl/pinpasjc/docs/apis/jc222 but didn't find anything.
But, here I found a mention of something like STK_CMD_SEND_DATA (in the same place about receiving data, opening and closing a channel), but did not understand how to use it in practice.

Answer 1

the javacard specification itself (versions 2.2 and below 100%, and even 3+, as far as I remember) does not provide the ability to open sockets and any other similar types of connection. so do not even dig in this direction.
Usually the card/sim developer provides all the specific libraries and SDKs. But as a rule, no one will give you anything if you do not officially cooperate with them. In this area, any information other than general information (javacard, gp, op) is classified as a trade secret. If the libraries are not provided, then it is not possible to use the full functionality of the map. Please contact the map developer for any questions.