Main Page > Advanced Trackers > FMB122 > FMB122 Manual > FMB122 LED status
This section is an explanation of LED indications on an FMB122 device.
| Behaviour | Meaning |
|---|---|
| Permanently switched on | GNSS signal is not received |
| Blinking every second | Normal mode, GNSS is working |
| Off | GNSS is turned off because: Device is not working or Device is in sleep mode |
| Blinking fast constantly | Device firmware is being flashed |
Status LED Indications
| Behaviour | Meaning |
|---|---|
| Blinking every second | Normal mode |
| Blinking every two seconds | Sleep mode |
| Blinking fast for a short time | Modem activity |
| Off | Device is not working or Device is in boot mode |