I currently own two Zigbee-based dimmer switches from Philipps Hue (the old V1 version). I was always wondering what the different blinking patterns of the LED indicated. Understanding them was not too straightforward. So here is a quick summary:
| Blinking orange | The device is currently in pairing mode, waiting to be paired. A hard-reset and re-pairing can be triggered by pressing the SETUP button on the back for at least 10 seconds. |
| Blinking 1x red when pressing / releasing a button | The device currently has no connection to the bridge and cannot send the button press. Or: The battery is very low (< 2%). |
| Blinking 1x orange when pressing / releasing a button | Here, I am not sure yet. Either it means an OTA upgrade is currently in progress (OTA upgrades can take up to 30 minutes). Or it means, the battery is low (< 5%). |
| Fast toggling between all colors while pressing and holding the SETUP button on the back. | Indicates that the switch is about to reset. Keep holding SETUP until the light is consistently blinking orange. Then, it is in pairing mode again. |
| 1x short red, then solid green | You have soft-reset the device by pressing and holding all 4 buttons. |
| Toggling between green and red | The device is reconnecting to the network after a soft-reset |
I hope that clears things up for you, if you were wondering about the behavior of the Hue switch like I did.