Portenta H7: IRQ wakes device up, but callback is not called

[EdCar]

I appreciate you responding. I added that line at some point because I saw it in example code somewhere.

I commented out that line of code but there’s no change in behavior; the LED blinks periodically, but triggering the pin still does not toggle the LED between the blinking. Therefore, I assume the callback isn’t being called.

May or may not be related, but I found a different post with a similar problem but on a different board:

how to capture an image when an external trigger arised

Can you repost your code with code tags? Also, I notice you are not using global in your callback method. Python methods do not have scope of variables like C unless you say a variable is global before hand. def callback (line): cap = 1 Is not valid python code. You have to do: def callback (line): global cap cap = 1