Thank you, Rubus_chiliadenus, I look forward to giving that a try.
As I understand it, ovari, Raspberry OS is a specially optimised version of Debian for the Pi. In addition, this particular Pi has been built for a specific purpose, and I went to a lot of trouble to do that. So I don’t want to change it. I would be willing to install Debian 12 on another SD card if necessary, just to prove the idea, but it’s not the solution I’m after. Just having the daemon sounds like a good plan, as then the Pi can be headless and fanless with no GUI (I have several of those). I can’t imagine it requires much processing power just to store and forward a few, occasional messages.
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