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Depending on the length of the run, you may want to consider using POE instead of bring line voltage to the box. I have used POE with a buck board to drop the voltage down to 5 volts. The best part is that it is considerably small then the USB power supply.
You can try putting the sound configuration in /etc/asound.conf. The other option is editing /etc/modprobe.d/alsa-base.conf.
A couple more thoughts. Look at the time stamps on the files. Also, how are you rebooting? If you are using "sudo reboot" try using "sudo shutdown -r now" instead.
The system should not be overwriting these files. Are you sure you don't have a read-only file system with a RAM overlay for changes? That would account for the files not surviving a reboot. But I am at a loss on how you would create one and not know it.
The system should not be overwriting there files. Are you sure you don't have a read-only file system with a RAM overlay for changes? That would account for the files not surviving a reboot. But I am at a loss on how you would create one and not know it.
From reading about other people doing the same thing, you would want to do it to free you from being tied to one specific app to control these. It is one pathway to being able to control the plugs from Alexa or Google Home.
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