From my glances of the protocol sheet, I've gathered:
* A crossover (null modem) cable is required, as RXD/TXD are swapped on both ends of the cable.
* fairly standard RS232 settings, 9600 BPS, N, 8, 1, which is what the generic serial device does by default.
* the protocol is a mash of binary and ASCII, and very compact.
DC1/DC2/ETX are ASCII control characters (which have their roots in Teletype communication, but I digress), look at an ASCII chart for their equivalents, like:http://www.asciitable.com/index/asciifull.gif
As you see, 0x11 (hex) is DC1, which translates to \11 in TestSerialCommand or \x11 within a GSD string.
The values to use for timeout are specified there in the protocol sheet, but I will just for example say timeout is 0, so, TOUT 1 2 and 3 would all be 0.
so for the ready command (which according to the specification must be sent at the start of any communication), you would do for TestSerialPort:
This should spit back a long string of data. Let's see if this does anything, first.