added pnpList.vbs, updated readme

README.txt

@@ -1,13 +1,17 @@
-usbSearch -- Search for USB devices 
+usbSearch -- Search for USB devices, list USB COM ports, in Windows
 
 2012, Tod E. Kurt, http://todbot.com/blog/
 
 
 A list of Windows-only tools (for now) for inspecting USB devices & serial ports
 
-- usbSearch.vbs    - search USB bus by VID / PID
-- usbSearch.c      - search USB bus by VID / PID (but in C, not VBScript)
+- usbSearch.vbs    - search USB bus by VID / PID, in VBScript
+- usbSearch.exe    - search USB bus by VID / PID 
+- usbSearch.c      - source code for usbSearch.exe
 - listComPorts.vbs - list all known COM ports, with other useful info
+- listComPorts.exe - list all known COM ports, with other useful info
+- listComPorts.c   - source code for listComPorts.exe
+- pnpList.vbs      - list all PnP devices, USB and other
 
 The .vbs files are executed on the command-line with the "cscript.exe" command.
 For instance, to list all the COM ports, run:
@@ -16,7 +20,23 @@ $ cscript.exe //nologo listComPorts.vbs
 COM26 - FTDI - FTDIBUS\VID_0403+PID_6001+A6004CCFA\0000
 COM24 - PJRC.COM, LLC. - USB\VID_16C0&PID_0483\12345
 
-The above example shows an Arduino Diecimila and Teensy plugged in.
+The exe file outputs similar results when run:
+
+$ listComPorts.exe
+COM26 - FTDI - FTDIBUS\VID_0403+PID_6001+A6004CCFA\0000
+COM24 - PJRC.COM, LLC. - USB\VID_16C0&PID_0483\12345
+
+The above examples show an Arduino Diecimila and Teensy plugged in.
+
+Note that the USB VID and PID are displayed (0403 and 6001, respectively, 
+for the Arduino), and the serial number too, if the device has one.
+In the Arduino case, the serial number is "A6004CCFA".
+The serial number is useful for determining which Arduino is bound to which
+COM port.
+
+To build the exe files, install MinGW or similar and type "make".  
+See the Makefile for details.
+