diff --git a/README.md b/README.md
index 58e0473..091fc20 100644
--- a/README.md
+++ b/README.md
@@ -1,93 +1,123 @@
-# SIM Toolkit Examples
+# SIM Toolkit Examples
-Various example Java SIM Toolkit applications. You typically install them using
-the tools from the repository.
+This repository contains example Java SIM Toolkit applications.
-For more information see
-
+Build requirements
+------------------
+### Install ANT:
-# Build requirements
+ANT is required to control the build process. It can be installed via APT
+(debian)
-Install a JAVA compiler and ANT:
```
-$ sudo apt-get install default-jdk ant
+$ sudo apt install ant
```
-Download the Javacard SDKs into the (empty) directory oracle_javacard_sdks
+### Download a suitable JDK:
+
+For compatibility reasons it is recommended to download a specific JDK and use
+it to compile the javacard applets. The code in this repository has been tested
+with the following JDK variants:
+
+Oracle Java SE Development Kit 11.0.24
+
+
+OpenJDK 11.0.2 (build 11.0.2+9)
+
+
+The easiest method to install the JDK is to download the tar.gz version and to
+unpack it to a suitable location and to let the environment variable `JAVA_HOME`
+point to that location.
+
+### Download JAVA-card SDKs:
+
+There is a curated github repository that contains a good selection of JAVA-card
+SDKs:
+
+Use the following commandline to download the Javacard SDKs into the (empty)
+directory oracle_javacard_sdks:
+
```
$ git submodule update --init --recursive
```
-There is also another component "ant-javacard.jar", which is automatically downloaded during the build process.
+Building CAP files
+------------------
-# Building CAP files
+The build process is started by running `ant`. The environment variable
+`JAVA_HOME` must point to the location of the JDK.
+
+ANT will also automatically download another required component called
+"ant-javacard.jar". See for
+more information.
-The build process is started by calling ANT
```
-$ ant
-Buildfile: /home/owner/work/git_master/hello-stk/build.xml
+$ JAVA_HOME=/home/user/bin/jdk/oracle/jdk-11.0.24/ ant
+Buildfile: /home/user/work/simcard_applet_loading/hello-stk_osmo/build.xml
dist:
- [get] Getting: https://github.com/martinpaljak/ant-javacard/releases/latest/download/ant-javacard.jar
- [get] To: /home/owner/work/git_master/hello-stk/ant-javacard.jar
- [get] https://github.com/martinpaljak/ant-javacard/releases/latest/download/ant-javacard.jar moved to https://github.com/martinpaljak/ant-javacard/releases/download/v23.08.29/ant-javacard.jar
- [get] https://github.com/martinpaljak/ant-javacard/releases/download/v23.08.29/ant-javacard.jar moved to https://objects.githubusercontent.com/github-production-release-asset-2e65be/28853876/2cb87380-f21f-45e7-894e-54ca5a3513d0?X-Amz-Algorithm=AWS4-HMAC-SHA256&X-Amz-Credential=AKIAIWNJYAX4CSVEH53A%2F20230906%2Fus-east-1%2Fs3%2Faws4_request&X-Amz-Date=20230906T085907Z&X-Amz-Expires=300&X-Amz-Signature=d16ac3b8e6a53831e85ec8315daa51b90f0ccfc09dcfd55d76bd8ff416a0651c&X-Amz-SignedHeaders=host&actor_id=0&key_id=0&repo_id=28853876&response-content-disposition=attachment%3B%20filename%3Dant-javacard.jar&response-content-type=application%2Foctet-stream
- [cap] INFO: using JavaCard 3.0.5 SDK in /home/owner/work/git_master/hello-stk/oracle_javacard_sdks/jc305u3_kit with JDK 11
- [cap] INFO: targeting JavaCard 2.2.1 SDK in /home/owner/work/git_master/hello-stk/oracle_javacard_sdks/jc221_kit
+ [get] Destination already exists (skipping): /home/user/work/simcard_applet_loading/hello-stk_osmo/ant-javacard.jar
+ [cap] INFO: using JavaCard 3.0.5 SDK in /home/user/work/simcard_applet_loading/hello-stk_osmo/oracle_javacard_sdks/jc305u3_kit with JDK 11
+ [cap] INFO: targeting JavaCard 2.2.1 SDK in /home/user/work/simcard_applet_loading/hello-stk_osmo/oracle_javacard_sdks/jc221_kit
[cap] INFO: Setting package name to org.toorcamp.HelloSTK
[cap] Building CAP with 1 applet from package org.toorcamp.HelloSTK (AID: D07002CA44)
[cap] org.toorcamp.HelloSTK.HelloSTK D07002CA44900101
- [compile] Compiling files from /home/owner/work/git_master/hello-stk/hello-stk
- [compile] Compiling 1 source file to /home/owner/work/git_master/hello-stk/build/classes
- [compile] /home/owner/work/git_master/hello-stk/hello-stk/src/org/toorcamp/HelloSTK/HelloSTK.java
- [convert] [ INFO: ] Converter [v3.0.5]
- [convert] [ INFO: ] Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
- [convert]
- [convert]
- [convert] [ INFO: ] conversion completed with 0 errors and 0 warnings.
+ [compile] Compiling files from /home/user/work/simcard_applet_loading/hello-stk_osmo/hello-stk
+ [compile] Compiling 1 source file to /home/user/work/simcard_applet_loading/hello-stk_osmo/build/classes
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/hello-stk/src/org/toorcamp/HelloSTK/HelloSTK.java
[verify] Verification passed
- [cap] CAP saved to /home/owner/work/git_master/hello-stk/build/HelloSTK.cap
- [cap] INFO: using JavaCard 3.0.5 SDK in /home/owner/work/git_master/hello-stk/oracle_javacard_sdks/jc305u3_kit with JDK 11
- [cap] INFO: targeting JavaCard 2.2.1 SDK in /home/owner/work/git_master/hello-stk/oracle_javacard_sdks/jc221_kit
+ [cap] CAP saved to /home/user/work/simcard_applet_loading/hello-stk_osmo/build/HelloSTK.cap
+ [cap] INFO: using JavaCard 3.0.5 SDK in /home/user/work/simcard_applet_loading/hello-stk_osmo/oracle_java
+ [cap] INFO: targeting JavaCard 2.2.1 SDK in /home/user/work/simcard_applet_loading/hello-stk_osmo/oracle_
[cap] INFO: Setting package name to org.osmocom.IMSIChange
[cap] Building CAP with 1 applet from package org.osmocom.IMSIChange (AID: D07002CA44)
[cap] org.osmocom.IMSIChange.IMSIChange D07002CA44900102
- [compile] Compiling files from /home/owner/work/git_master/hello-stk/imsi-change
- [compile] Compiling 3 source files to /home/owner/work/git_master/hello-stk/build/classes
- [compile] /home/owner/work/git_master/hello-stk/imsi-change/src/org/osmocom/IMSIChange/Bytes.java
- [compile] /home/owner/work/git_master/hello-stk/imsi-change/src/org/osmocom/IMSIChange/IMSIChange.java
- [compile] /home/owner/work/git_master/hello-stk/imsi-change/src/org/osmocom/IMSIChange/MobileIdentity.java
- [compile] /home/owner/work/git_master/hello-stk/imsi-change/src/org/osmocom/IMSIChange/IMSIChange.java:83: warning: [cast] redundant cast to byte
- [compile] proHdlr.appendTLV((byte)(TAG_DEFAULT_TEXT), (byte)4, prefillVal, (short)0,
- [compile] ^
- [compile] /home/owner/work/git_master/hello-stk/imsi-change/src/org/osmocom/IMSIChange/IMSIChange.java:134: warning: [cast] redundant cast to short
- [compile] gsmFile.select((short) SIMView.FID_DF_GSM);
- [compile] ^
- [compile] /home/owner/work/git_master/hello-stk/imsi-change/src/org/osmocom/IMSIChange/IMSIChange.java:135: warning: [cast] redundant cast to short
- [compile] gsmFile.select((short) SIMView.FID_EF_IMSI);
- [compile] ^
- [compile] /home/owner/work/git_master/hello-stk/imsi-change/src/org/osmocom/IMSIChange/IMSIChange.java:145: warning: [cast] redundant cast to short
- [compile] gsmFile.select((short) SIMView.FID_DF_GSM);
- [compile] ^
- [compile] /home/owner/work/git_master/hello-stk/imsi-change/src/org/osmocom/IMSIChange/IMSIChange.java:146: warning: [cast] redundant cast to short
- [compile] gsmFile.select((short) SIMView.FID_EF_IMSI);
- [compile] ^
- [compile] /home/owner/work/git_master/hello-stk/imsi-change/src/org/osmocom/IMSIChange/IMSIChange.java:173: warning: [cast] redundant cast to byte
- [compile] proHdlr.init((byte)PRO_CMD_REFRESH, SIM_REFRESH_SIM_INIT_FULL_FILE_CHANGE, DEV_ID_ME);
- [compile] ^
- [compile] /home/owner/work/git_master/hello-stk/imsi-change/src/org/osmocom/IMSIChange/MobileIdentity.java:41: warning: [cast] redundant cast to byte
- [compile] byte nibble = bcd[(byte)nibble_i >> 1];
- [compile] ^
+ [compile] Compiling files from /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change
+ [compile] Compiling 3 source files to /home/user/work/simcard_applet_loading/hello-stk_osmo/build/classes
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/Bytes.
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/Mobile
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
+ [compile] proHdlr.appendTLV((byte)(TAG_DEFAULT_TEXT), (byte)4, prefillVal, (short)0,
+ [compile] ^
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
+ [compile] gsmFile.select((short) SIMView.FID_DF_GSM);
+ [compile] ^
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
+ [compile] gsmFile.select((short) SIMView.FID_EF_IMSI);
+ [compile] ^
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
+ [compile] gsmFile.select((short) SIMView.FID_DF_GSM);
+ [compile] ^
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
+ [compile] gsmFile.select((short) SIMView.FID_EF_IMSI);
+ [compile] ^
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/IMSICh
+ [compile] proHdlr.init((byte)PRO_CMD_REFRESH, SIM_REFRESH_SIM_INIT_FULL_FILE_CHANGE, DEV_ID_ME);
+ [compile] ^
+ [compile] /home/user/work/simcard_applet_loading/hello-stk_osmo/imsi-change/src/org/osmocom/IMSIChange/Mobile
+ [compile] byte nibble = bcd[(byte)nibble_i >> 1];
+ [compile] ^
[compile] 7 warnings
- [convert] [ INFO: ] Converter [v3.0.5]
- [convert] [ INFO: ] Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
- [convert]
- [convert]
- [convert] [ INFO: ] conversion completed with 0 errors and 0 warnings.
[verify] Verification passed
- [cap] CAP saved to /home/owner/work/git_master/hello-stk/build/ImsiChange.cap
+ [cap] CAP saved to /home/user/work/simcard_applet_loading/hello-stk_osmo/build/ImsiChange.cap
BUILD SUCCESSFUL
-Total time: 7 seconds
+Total time: 2 seconds
```
+
+In case a different JDK has to be chosen it is important to check if the JDK is
+compatible with the JAVA-card SDK. Not all combinations will yield usable
+results.
+
+A table with compatible JDK / JAVA-card SDK combinations can be found here:
+
+
+Loading CAP files
+-----------------
+
+The loading of the CAP files is typically done using the tools from .
+
+For more information see:
+