Tell us about yourself!
I love the turning of the etch-a-sketch into a CNC machine but I *really* admire the ones who do it manually.https://www.huffpost.com/entry/etch-a-sketch-anniversary_n_3581395
I don't think soldering wires to your kids and connecting them to an amp will work quite as well. Or then again, maybe it'll work *better.* Are they good singers? The power from the amp should at least get them to jumping some. If ya have both a boy and a girl, then you have your bass and tweeter right there.
Much better method. Send an up-time message. If Home-Assistant gets a message with an up-time of less than a minute and then the device drops the connection, then Elvis has left the building. If the first message received has an up-time of >10 minutes (adjust as needed), the prodigal son has returned.
And if you accidentally overwrote the bootloader? How about if you don't have a microUSB cable handy (unlikely but possible)? Or if you need the extra 1.5k of flash that's used by the bootloader?