Cables and old fashioned switches please

Funny thing about those old fashioned light switch things, most of them have a lifespan of 25+ years, and require no power or troubleshooting at all.

If you do decide to make life complicated with these things, please at least give us some useful way to debug the stuff.

Does the light not work because, a) the bulb's failed, b) the wireless switch has failed, c) the wireless transmitter has failed, d) the wireless switch is on the wrong channel, e) the wireless switch is suffering interference, or f) because the router's down, g) because your internet connection has failed, h) because you've been hacked, i) because you're using the wrong switch (office vs home light switch), j) your switch is of a different and slightly incompatible design, or k) you need to replace the battery on the transmitter. You could argue that the last one is a subcase of c, but IMO a flat battery is different to a failed device. I'm sure there are countless other potential stumbling blocks I've forgotten.

It's probably going to be simpler to buy a new house with those old fashioned light switches in it, than it would be to troubleshoot just one of these things successfully ;)