Hi, I am working on getting a new study up and running and we purchased a stimtracker with the included lightsensors to validate the timing of visual stimulus onset and offset. We are using Psychtoolbox for our stimulus presentation and have set up a black patch to appear under the light sensor when the stimulus is shown. We are collecting the output from the stimtracker through the computer’s serial port. However, I am having some difficulty making sense of the serial port ouput: 9 values seem to be output at the onset and offset of the light sensor. Does anyone have any insight into how to decode this output?
See the XID Commands page and search for “PROTOCOL FOR STIMTRACKER 2G” within the page. It describes the format.