Status LEDs
OSS devices use four status LEDs to indicate various device modes and states: blue, yellow, green and red. You may find the yellow LED has an orange tint.
|
LED Color |
Purpose |
|
Blue |
Cellular indicator |
|
Yellow |
BLE/Wi-Fi indicator |
|
Green |
Cloud connection indicator* |
|
Red |
Firmware server indicator* |
*Red and green status LEDs are user-programmable.
|
Pattern |
Description |
Meaning |
 |
Blue LED is off |
No cellular connection |
 |
Blue LED blinking |
Trying to register to a cellular carrier |
 |
Blue LED blinking at high speed |
Registered on a cellular network |
 |
Blue LED is permanently on |
PPP (Point to Point Protocol) link has been established over cellular |
|
Yellow LED is off |
Device is not paired through BLE or connected to Wi-Fi |
 |
Yellow LED is permanently on |
Device is paired through BLE or connected to Wi-Fi |
 |
Green and red LEDs blink three times |
System is booting up |
 |
Green LED blinking |
Device is connecting to the cloud (e.g., Azure) |
 |
Green LED is permanently on |
Device is currently connected to the cloud |
 |
Red LED is permanently on |
Device is connected to the firmware server |
 |
Green and red LEDs slowly blinking in turns |
Password reset initiated by the MD |
 |
Green and red LEDs blinking in turns at high speed |
No valid TiOS found |
 |
Red LED blinking |
EEPROM, flash disk or IO extender error |
Notes
- Green and red status LEDs are user-programmable, so their meaning may differ from the above descriptions
- When interacting with different layers of the OSS device, status LEDs may have different meanings