Thank you friend, you are great... soft is work good but now I have problem with interface (RS232<->TTL), RX communication is OK but no success with transmit
may be polarity problem...
I found interface schematic and protocol explanation on this forum page - http://www.autogas4you.org/board/thread.php?threadid=3625&threadview=0&hilight=&hilightuser=0&page=1
but cannot see the picture - Prins_VSI_Adapter.png .
If somebody help me, German language is difficult for me, google translate not help in this case