Main thing I’m trying to get across is the “how to be careful”. Once you understand how all headless devices work, and how they usually protect themselves, it’s much easier to stay safe.
- Corrupting the OS so it can no longer “talk and be programmed” is always possible, unless there is an extra copy of the OS, which would be hard to imagine for a HA, since there’s little real estate to simply add that protection, or to provide a separate means of triggering it, (like your WiFi might have a hard reset switch).
- Keep a copy of every “pre”-changed settings with dates and notes. Even if you must get help from your provider, that might save him a lot of time. Your backup may or may not be complete, similar to Windows Image, which only gets most of what it thinks is needed, not everything.
- When updating firmware, ensure you use reliably good cables and devices that are operating from a battery or at least a UPS. NOAH’s say they can be bricked if power is lost.
- Try to not make many changes at once, to prevent trying to discover later, which change had that unintended effect.
I have bricked several devices inadvertently. At least with a PC, you can still get the data and files off of it, and they are now pretty cheap. OTOH, if I brick my thermostat or lightning does it for me… No AC until I fix or replace it.