Knowledge Base › Troubleshooting
What do the LED lights on my Nimbio device mean?
Three onboard LEDs — the yellow PWR light, the blue NET light, and the red STATUS light — give you a quick-reference diagnostic without opening the app or calling support.
Start with the yellow PWR LED
Always check power before diagnosing anything else — a network or status issue can’t be read correctly if the board isn’t powered.
Off
Control board lacks power. Check the power connection before anything else.
On
Control board has power. Move on to the NET and STATUS lights.
NET (Modem Status) LED — Blue
Tells you whether the cellular modem is connected.
Off — modem has not been powered on.
Solid blue — modem is actively searching for a network.
Blinking blue quickly — connected to the network and operating normally.
STATUS (Board Status) LED — Red
The most detailed of the three — tells you exactly where the board is in its startup and connection sequence.
Off — board doesn’t have power.
Solid red (over 1 second) — board is booting up.
Two red blinks every 2 seconds — the board isn’t fully connected yet. This covers both a cellular network the modem can’t reach and a network connection that can’t reach Nimbio’s servers.
Brief bright red flash — the board detected a change in the physical sense lines. This appears as a short flash layered on top of the normal breathing pattern, not a separate steady state.
Breathing red (slowly bright to dim) — board is operating normally.
Board seems unresponsive? If the board hits a problem it can’t recover from, it can cut its own power for a second or two and fully reset itself — a built-in “turn it off and on again.” A brief moment of dark LEDs isn’t necessarily a broken board; give it a moment before assuming a hardware failure.
Frequently asked questions
Still stuck?
Our support team can walk through your LED pattern with you over the phone.
Call 800‑353‑3422 Send a message →