stop auto sleep

Using my Tiny 4k camera when in a Google meet if my video is turned off, but I am using the camera's microphone, then the microphone shuts down when the camera goes to sleep. Is there a way to keep the microphone on, independent of the video?

I use an Android cell phone to log on to the website speechchat.com and have the website activate the voice on my phone to read aloud what people are saying on the chat. Unfortunately the chat goes to sleep after 30 minutes of total non-activity. I was thinking of having an every quarter of an...