Openlogger how to query reading via usb

[JimR]

We have both of these and would like to use either of them to measure dc
voltages. The problem is we are using robotics to move our sensors so we also
need the x,y,z coordinates as well as the voltage read at those coordinates.
Is there any way to ask the hardware to report what it is reading? Our software
basically positions the sensor in one of 900 possible grid locations and we
then measure 2 voltages and compute the current from the voltage drop across a
know resistor as well as reading magnetic field strength.  If we could put the
coordinates into the log perhaps using the digital i/o. We just need a way to
indicate the position where we took the readings in the log file somehow.
Thanks.