Nano Matter - how to de-commission the board on Alexa

[bmillier]

I have a related post about my Nano Matter board no longer working on Alexa. My other question is how one would de-commission a nano matter board on Alexa. Removing the Alexa device that corresponds to the Nano Matter board would, for a while, allow me to try other nano matter demo programs. But, it never resulted in the demo program reporting that the board had not yet been commissioned- which is when it gives you the pairing code. This pairing code never changes for any given nano Matter board. This must have something to do with why I can no longer discover the Nano Matter board when I use the Alexa "add a Device" operation, ( which did find the board with the first few demos I tried). Thanks

[xfpd]

@bmillier

I have a related post

Nano Matter- No longer seen by Alexa but initial demo worked

I tried out my new Nano Matter board using the Nano_Matter+lightbulb demo. This worked great! Then I tried the humidity demo. I had to remove the lightbulb device from Alexa to get this second demo to work, which it more or less did (Although it just sends out dummy humidity readings. I have the Si7021 humidity sensor hooked up but see there is no code to read it in the demo) ) . All of the demos use the same pairing code, so once it has been commissioned, , it won't find any new device until yo…

[jcarolinares_arduino]

Please @bmillier and @xfpd take a look at:

https://docs.arduino.cc/tutorials/nano-matter/user-manual/#device-decommissioning

best

[bmillier]

Hi Mr Carolinares. Thank you very much for the prompt reply. I had actually found the answer late last night on a Silabs Youtube video- but due to the time difference (I'm in Canada) had not updated my post yet.
I was just following the Nano Matter user manual and there are pages of info on other hubs like Google, etc. before the reader would get to this info towards the end of the manual. The "index" pane on the right of the screen basically only shows you what you are already looking at. You have to scroll all the way through it before you see the "de-commissioning " topic on the right hand pane. The right panel scroll bar hardly shows up on my monitor (my monitor's issue) .
What is the story on the other demos? The Nano manual does say that only the Color light demo will work. Is this true? I had limited success with the humidity demo before I got caught up in the decommissioning issue.
There is some ambiguity about these demos. The Humidity demo only sends out dummy data- I realized this after hooking up a Silabs Si7021 humidity sensor and then seeing there was no code in the demo to support it. On the other hand, the air quality demo does have the code for the SGP40 and sends it out locally thru serial port- but I don't know if it reports it to Alexa yet (I was stopped by the de-commissioning issue).
I'm an editor with Circuit Cellar magazine and have written many articles based upon Arduino-compatible MCUs. I am planning on writing one on this Nano Matter board- that is why I am asking all of these questions. Best regards

[bmillier]

I also found out that just "Burn bootloader" function in the Tools menu also de-commissions the Nano MAtter as well.