Sorry, it took a while to post the scope images. I'm a new user and my post was sent for moderation.

First, are the traces with a 1.0 millisecond time scale.

Blue is a 1.28 KHz signal being fed into GPIO 4. That is the wake-up trigger.
Yellow is the output from GPIO 13. It is set high just before ...

I was interested in how long it takes an ESP32-C3 to enter and wake from light-Sleep, but I could not find anything posted, so i did some experimentation. I thought I would post the results here for others.

I wrote some code to go into a loop entering Light-Sleep and then wake up on a GPIO (4 ...