How to configure buzzer notification using a rak4630?

Forgive me if this might seem like a very simple question with a very obvious answer. I get nervous when I’m trying something new. I have destroyed 4 devices because i have wanted to try do something ive never done before.

My question is how to safely configure a buzzer to notify me whenever i get a new message?

I bought several meshtastic starter kits (19007 base board with the rak4630). I also bought buzzers rak18001 for several of these kits. I have watched the YouTube video that goes into what you can do with external notification. In the video it says he put the gpio to 21.

When i go to the website it doesn’t say anything about putting the gpio number to 21. It mentions something about pwm buzzer. I’m not sure what a pwm buzzer is and i dont see anywhere in the settings where i can choose the option for a pwm buzzer.

So far i have installed the latest firmware to the rak4630 and installed the buzzer on slot C. What do i do next to make the buzzer go off whenever i get a new incoming message?

Here are what my setting look like so far:

I have the same question, did you ever get this figured out?

Me too. Also, is it a different pin when the baseboard is the 19003

21 is correct for a 19007, I think the 19003 is 9

9 doesn’t seem to be working on the 19003. It’s on Slot D, so I suspect the pin needed is IO6.