Is it possible to record UNIX time with millisecond precision?

Coding
1

In order to work out the absolute delay between when triggers are received in the programme I am using to record EEG, and the time that stimuli are first presented in psychopy, I am trying to use the core.getAbsTime() in psychopy so I can compare with UNIX timestamps recorded in the EEG software.

This works, but I can only get UNIX timestamps in Psychopy to the nearest second. Is there are way to record these timestamps with millisecond precision?

Thanks

2

Hi @nrh31, have you thought about using Pythons time package? See docs.

You could save time at specific events using:

# Begin Experiment
import time

# Each Frame
if event == true:
    thisExp.addData("utcTime", time.time())

Note, the time docs do say that not all systems provide time with better precision that 1 second.

3

This works really well! A perfect solution to my problem.

Many thanks

4

This does not work if it gets pushed to Pavlovia. It just get stuck at “initializing experiment…”

Any ideas as of how to fix this?

5

Hi @CbjOpto yes this was a Python solution, but you can easily do something similar in JS:

unixTime = new Date().getTime()
psychoJS.experiment.addData("unixTime", unixTime)
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