reading eye data from serial port

Hello,
Serial port is supported in ML but I haven't seen any use case examples showing how to use it. My specific goal is to read eye position samples from an ASL eye tracker and input these in eye_, eye2_ tracker signals.
Any hints on how to do that would be most welcome.

What matters is what the serial port is supported for. To be interfaced with NIMH ML, your eye tracker should support voltage output. And you need an NI board. You can use TCP/IP instead, if your eye tracker is either Arrington, EyeLink or ISCAN.

Understood. I'll use an NI board, but that means I won't be able to recover pupil diameter.
Binocular ASL provides 4 analog outputs, allowing to read h and v for both eyes, but it leaves out pupil diameter. Its RS-232 output contains everything. With the PsychToolbox, I was able to read and decode serial data packets using the IOPort mexfile .
What then is serial input supported for in NIMH ML ?

It is unfortunate that the ASL tracker does not support voltage output for pupil size. NIMH ML does not sample/save serial input automatically for you, but you can still read and decode it yourself.

MATLAB has built-in commands for serial port, so I don't think you will need PsychToobox but you can call the IOPort mexfile, too, if you want.