PTZ Wi-Fi Indoor Camera C2：

Red light solid on: Device is starting up
Red light slow flashing: Device is waiting for network setup
Blue light fast flashing: Device is connecting to the network
Blue light solid on: Device is connected to the internet
Blue light slow flashing: Live view in the CYVIO app
Red and blue lights flashing: Device network error
Purple light solid on: Device firmware updating

Solar Battery-powered Camera B220 / B221:

Red light solid on: Device is starting up
Red light slow flashing: Device is waiting for network setup
Blue light fast flashing: Device is connecting to the network
Blue light solid on: Device is connected to the internet
Blue light slow flashing: Live view in the CYVIO app
Red and blue lights flashing: Device network error
Purple light solid on: Device firmware updating
Green light solid on: Device is charging
Green light flashing: Charging error
No light: Sleep mode / device not powered on

Battery Doorbell R112: LED Ring is the indicator light.

Blue breathing (pulsing) light: Device wakes up and an event is triggered (after 10 seconds, it turns to solid blue)
Blue light solid on: Device is in an active (awake) state
Red and blue lights flashing: Device is disconnected from the base station
Orange light solid on: Device is charging
Purple light solid on: Device firmware updating
Infrared light flashing: Device is pairing with the base station
No light: Sleep mode / device not powered on

HaLow WiFi Solar Camera B301: 

Purple light solid on: Device is starting up
Blue light flashing: Pairing in progress
Red light solid on: Device previewing (live view)
Blue light solid on: Charging
Infrared light flashing: Device firmware updating

NVR：

N2834/N2838/N2834D/N2838D：

Red light solid on: Device is starting up / not connected to the network
Blue light flashing: Device is connected to the internet but not connected to the CYVIO cloud service
Blue light solid on: Device is connected to the CYVIO cloud service
Red and blue lights flashing: Hard drive not installed / hard drive error
Purple light solid on: Device firmware updating

N1814/N1812：Three indicator lights.

Power Status LED (Green only)
Green light solid on: Device is powered on

Storage Status LED (Red only)
Red light off: Unformatted storage inserted / no storage inserted
Red light solid on: Formatted storage inserted
Red light flashing: Device is recording

Network Status LED (Blue only)
Blue light solid on: Device is connected to the internet
Blue light off: Device is not connected to the network

Battery Doorbell Kit R112 Base Station:

Red light solid on: Device is starting up
Red light slow flashing: Device waiting for network setup
Blue light fast flashing: Device connecting to the network
Blue light slow flashing: Live view in the CYVIO app
Red and blue lights flashing: Device network error
Purple light solid on: Device firmware updating