Has one of the lamps in your Philips Hue smart lighting set become "unreachable"? It may be simple that someone has manually turned off the switch that supplies them with electricity, or perhaps a lamp is too far away from the Hue Bridgeor your other Hue lamps. But if all your Hue lamps and accessories misbehave, wireless interference is probably the culprit and the bridge may need a new home.
That happened to me recently with my own Philips Hue lamps. I had a mix of Hue and third-party lamps, smart plugs, switches and buttons that were all connected to a Hue Bridge in my office, and everything worked well for a few months. (Note that I use my Hue lamps with a Zigbee bridge instead of directly with my phone via Bluetooth.)
Then my lights became glitchy without warning. First, a few of my Hue-compatible Innr smart plugs were marked as "unreachable" in the Hue app, meaning that the Hue Bridge had lost contact with it. Then a few of my Innr lamps also became unreachable.
At first I blamed the Innr hardware and I thought maybe I paid the price because I had skimped cheaper cheaper third-party lamps and smart plugs. But then the bridge also lost contact with my Hue switches, as well as my real Hue Smart Button and my outdoor spotlight. Something else was going on (sorry I doubted you, Innr lamps).
After I checked that all my physical wall and lamp switches were on (they were), I tried some basic troubleshooting steps. Because I thought my lights just needed to be restarted, I removed all my lights and accessories from the Light Setup screen in the Hue app and reconnected them. At first this seemed to work, but then my lights became unreachable one by one and I was back.
I then tried something more advanced: changing the Zigbee channel on which my Hue Bridge was active. Because Zigbee shares the same 2.4 GHz wireless band as Wi-Fi routers, there is a good chance that your Wi-Fi network at home disrupts the wireless Zigbee connection between your Hue lamps and the bridge.
You can choose from four Zigbee channels — 11, 15, 20, and 25 — and you must ensure that all your Hue and other connected smart lights are turned on before changing channels The app doesn't give you any clues as to which channel can have less interference, so it's all a bit of a guessing game. (You can first check to see which 2.4 GHz channel your WiFi router uses, but that's not a reliable option for those of us with newer mesh routers that directly choose and choose channels.)
Anyway, I switched Zigbee channels once, twice and then a third time. No dice.
Finally I started the Keep an eye on Hue Bridge and, who was sitting under my desk right next to my mesh router. My office is in our basement, at the very back of our long apartment, and near several PCs, Macs and laptops, most of which are connected to Wi-Fi. I also recently installed some new WiFi lamps and smart plugs in my office for testing. Could it be …?
I went ahead and unhooked my Hue Bridge, hunted around my apartment and found a new place: downstairs in the middle of our living room, away from the thickets of wireless interference in my office and (luckily) near an available Ethernet cable .
I held my breath, started the Hue app, navigated to the Light Setup screen, tap Add Lights (after I removed all my lights and smart plugs from the app again), and lo and see, everything popped up up again. After having lived with the Hue Bridge at its new, much more central location for about a week, my lights, smart plugs, switches and buttons all seem to work perfectly.
Moral of the story: keep your Hue Bridge at least a few meters away from your wireless router if possible, and ideally in a centralized area that is not infused with WiFi interference. apartments, but with a bit of trial and error, you can find a place for the bridge that makes the connection with your Hue lamps and accessories much more stable.