Philips Hue Bridges troubleshooting

Published specification

What is true of this model and changes how you fix it

• Capacity
  Philips states the Bridge supports up to 50 lights and 12 accessories. Those are two separate limits, and the accessory limit is the lower and the one people reach first — a switch or sensor that will not pair on a large system is worth checking against the 12-accessory figure before anything else.
• Network
  Connects to the router by Ethernet cable, not Wi-Fi. That is the single most useful fact about this device for troubleshooting: Wi-Fi problems cannot affect the Bridge's own connection, and a Wi-Fi fix will never help it. What can affect it is the cable, the router port and the router's client list.
• Radio to accessories
  Zigbee to every light and accessory. Accessories have no independent path to anything — they reach the Bridge over Zigbee and nothing else — so a Bridge fault presents as every light and switch failing at once, and no accessory-level check means anything until the Bridge is confirmed working.
• Power
  A supplied mains adapter, 120 V in the US, with standby power consumption stated as 0.1 W. There is no battery, so the Bridge stops with the power and returns with it, and everything commissioned to it stops too.
• Mesh behavior
  Mains-powered Zigbee devices — the lights — repeat the mesh. Battery accessories such as dimmer switches and motion sensors do not. That is why adding another battery accessory never improves range, and adding a mains-powered light often does.
• Philips Hue's own specification
  Philips publishes the Bridge's specification at philips-hue.com/en-us/p/hue-bridge/046677458478, and its support section for the system at philips-hue.com/en-us/support/product/philips-hue-system/100005.
• What a bridge does
  It controls up to 50 lights, assigns room names, enables full voice control, configures Hue accessories, sets timers and schedules and allows away-from-home control.
• Protocols
  Products before 2019 use Zigbee Light Link, and later ones use Bluetooth or Zigbee 3.0.

Where these figures were read. philips-hue.com/en-us/p/hue-bridge/046677458478 (Hue Bridge product page)

Manufacturer support for this product line. Philips Hue Support — Philips Hue system support. Philips Hue's own support section for the Hue system and Bridge — the hub every Zigbee accessory reports through, and the only component with a network connection of its own.

Also read for this model. Wikipedia — Philips Hue.