diff --git a/opkg.sh b/opkg.sh
index 62ef5b9..5c0aa84 100755
--- a/opkg.sh
+++ b/opkg.sh
@@ -148,12 +148,8 @@ write_config() {
     echo "$data" > "${path}/$2"
     # echo $(cat "/tmp/test.txt" | jq -C --indent 4 '.') > /tmp/test2.txt
 }
-
 # write_config "/home/root/szeged/customer_281/szeged/1/1/" "test.txt"
 
-    # x=$(cat "/home/root/szeged/customer_281/szeged/1/1/test.txt" | jq .opkg.atbqt)
-    #echo $x
-
 # Download opkg-package. After the download, extract data.tar.gz to
 # access e.g. atbqt.
 download_opkg_package () {
@@ -201,3 +197,83 @@ download_opkg_package () {
 }
 # download_opkg_package "atbqt" "atbqt_1.0.0-r1_cortexa9t2hf-neon.ipk"
 
+ar_extract_opkg_package_data () {
+    return 0
+
+    cp $1 "/tmp"
+    # mv $1 "/tmp"
+    cd /tmp
+    # ar -x $1
+    #if [ $? ne 0 ]; then
+    data_file="data.tar.xz"
+    if ! [ -f "$data_file" ]; then
+        printf "ERROR %s does not exist\n" "$data_file" >&2
+        return 1
+    fi
+
+    cd -
+    return 0
+
+    tar -qxvf $data_file
+    
+
+    echo $pwd 
+}
+# ar_extract_opkg_package_data "atbqt_1.0.0-r1_cortexa9t2hf-neon.ipk"
+
+tar_extract_opkg_package_data () {
+    exec {ftar}< <(tar -xvf "$2" -C "$1") # use process substitution
+    cs_pid=$! 
+    exec {ftar}>&-  
+    wait $cs_pid
+
+    binary="$1/$3"
+    if ! [ -f "$binary" ]; then
+        printf "ERROR %s does not exist\n" "$binary" >&2
+        return 1
+    fi
+
+    return 0
+}
+# tar_extract_opkg_package_data "/tmp" "data.tar.xz" "opt/app/ATBAPP/ATBQT"
+
+read_atbqt_version () {
+    version=$(/tmp/opt/app/ATBAPP/ATBQT -v)
+    version=(${version// / })
+
+    if [ ${#version[@]} -lt 7 ]; then
+        printf "ERROR %s has wrong format\n" "${version[@]}" >&2
+        return 1
+    fi 
+
+    version=("${version[3]}" "${version[6]}")
+    echo ${version[@]}
+}
+# xxx=`read_atbqt_version`
+# echo $xxx
+
+
+check_atbqt_version () {
+    if `download_opkg_package "atbqt" "atbqt_1.0.0-r1_cortexa9t2hf-neon.ipk"`; then
+        return 1
+    fi
+
+    if `ar_extract_opkg_package_data "atbqt_1.0.0-r1_cortexa9t2hf-neon.ipk"`; then
+        return 1
+    fi
+    
+    if `tar_extract_opkg_package_data "/tmp" "data.tar.xz" "opt/app/ATBAPP/ATBQT"`; then
+        return 1 
+    fi
+    
+    version=`read_atbqt_version`
+    version=(${version// / })
+
+    if [ "${version[0]}" = "$1" ] && [ "${version[1]}" = "$2" ]; then
+        return 0
+    fi
+
+    return 1
+}
+check_atbqt_version "20221220_1038_00318q" "4.5.2-65-gf1799aa3_00318/Nexobility_dev"
+