We have used a Lumina 3G+ controller for a couple of years for fMRI studies, but recently we are having problems receiving the scanner triggers.
The Lumina is connected to a 3T Philips MRI scanner and to a MacBook Pro (macOS Big Sur, 11.6), and is set to Keyboard mode using ASCII.
The problem is that sometimes the trigger is not received (about 2-3 times out of 10).
Moreover, the trigger light (on Lumina) is always turned on even though MRI scanning is over.
Therefore, we have to turn off the controller and turn it on before the subsequent session starts.
Can you tell me how can I fix these problems?