SerialSniffer

SerialSniffer is a tool to visualize data, which are exchanged over the serial ports (i.e. RS232 or RS422). SerialSniffer gives you the possibility to have a deep view inside the data. You also can determine which data comes from which port, log it, record it for later playback or transmit via network. FAQ: http://www.serialsniffer.com/en/pdf/SerialSniffer_FAQ_English.pdf