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LED colors indicate air quality status, power state, and device activity

What does each LED color on the Atmotube PRO 2 indicate?

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Color / Pattern	State	Description
🔵 Blinking Blue	Not bonded	Device is in Bluetooth bonding mode (not yet paired).
🟠 Solid Orange	USB connected	Device is charging.
🟢 Solid Green	USB connected	Charging complete.
🔵🟢🟡🟠🔴 Solid Blue / Green / Yellow / Orange / Red	Button pressed	LED color represents the current Air Quality Score (AQS).
⚪️ Solid white	Button pressed	AQS data is not yet available.
🔴 Blinking Red (1 time, every 5 seconds)	Low battery	Battery level is below 5%. Please charge the device.
🔴 Blinking Red (2 times, every 5 seconds)	Invalid timestamp	Indicates missing or invalid time data. Connect to the mobile app for time synchronization.
🔴 Solid Red	Starting	Device is starting up.
🔴 Blinking Red (3 times)	Power off confirmation	Confirms that the device has been powered off.
🔴 Fast Red Blinking	Updating	Firmware update is in progress.
🟣 Blinking Magenta (1 time, every 5 seconds)	GPS fixed	Indicates GNSS fix - coordinates are being recorded.
⚪️ Blinking White	Error	Indicates a device error. Restart Atmotube PRO 2.