This article explains how to add an additional serial touch monitor on a Windows XPe system. 

⚠️ Note: Windows XP Embedded is no longer supported by Microsoft or Elo Touch Systems. This information is provided for customers still using these systems.

This article covers the archived 5.2.0 driver. See Elo XPe Component Help.htm in the driver package for full details.

Multiple Serial Ports:

The Elo Serial Interface component by default adds 1 serial port at installation. Add support for multiple ports by editing EloCOMPort.reg file. The following two lines are to be modified. To change the number of ports, change the InstalledSerialDevCnt value to the desired value.If you need to change port,change the FriendlyName value. Generally friendly name is like Communications Port (COMx), where x is the number of the port. If this string doesn't match with the one in the system, the serial port doesn't work. So it is very important that you have exactly matching string for the friendly name.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\EloTouchscreen]
"InstalledSerialDevCnt"=dword:00000001

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\EloTouchscreen\LegacyPorts\COM1]
"FriendlyName"="Communications Port (COM1)"

You need to add as many lines of friendlynames as many ports. For example for two ports on COM1 and COM2 you need to have these lines in the file.

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\EloTouchscreen]
"InstalledSerialDevCnt"=dword:00000002

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\EloTouchscreen\LegacyPorts\COM1]
"FriendlyName"="Communications Port (COM1)"

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\EloTouchscreen\LegacyPorts\COM2]
"FriendlyName"="Communications Port (COM2)"