OKAI IoT Status Lights
Use this reference when checking the physical LEDs on an OKAI ZK Series IoT module during setup or troubleshooting.
Most common field check
A slow white breathing light means the IoT is in normal operating mode. Fast red/white alternating flashing means the IoT is in TEST mode for configuration.
LED Status Reference
| Red LED | White LED | Meaning | What to do |
|---|---|---|---|
| Off | Off | Inactive mode | Power on the vehicle and confirm the IoT is receiving power. |
| Alternating flashing | Alternating flashing | TEST mode | Use this mode for ZK Tool configuration. Return to normal mode when finished. |
| Off | Breathing | Normal operating mode | No action needed if the vehicle is online. |
| Flashing | Off | ECU fault detected | Inspect ECU connection, vehicle power, and recent ECU/fault telemetry. |
| On | Off | IoT fault detected | Power cycle the vehicle and inspect/replace the IoT if the fault persists. |
Normal Mode vs Test Mode
Normal operating mode is the expected state for deployed vehicles. The white LED should breathe slowly and the red LED should remain off.
TEST mode is used when connecting the IoT to a Windows PC with ZK Tool or Modify Mode. In TEST mode, the red and white LEDs flash alternately. Vehicles should not be left in TEST mode after configuration.
Do Not Confuse IoT LEDs with Stem Lights
This article covers the physical red/white LEDs on the OKAI IoT module. Some OKAI models, including ES600 scooters, also have configurable stem/status lighting controlled by AT+GTLED.
If a tech reports "fast white flashing," confirm whether the red LED is also flashing alternately:
- Red and white alternating means the IoT is in TEST mode.
- White-only flashing on a stem/status light can be a configured LED work mode, not necessarily an IoT fault. See OKAI ES600 Stem and Status Light Configuration.
Return an OKAI IoT to Normal Mode
After server configuration or debugging is complete:
- Connect through ZK Tool.
- Press Ctrl + L.
- Send the normal-mode command:
OKAI normal-mode AT command — partner content
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If •••••sign in echoes back without OK, use the device's per-device AT password from IoT Credentials on the vehicle page and resend the command.
When to Escalate
Escalate to support if:
- The LEDs indicate an ECU fault after the ECU wiring and battery are checked.
- The LEDs indicate an IoT fault after a vehicle power cycle.
- The module stays in TEST mode and does not accept the normal-mode command.
- The lights show normal mode but the device remains offline for more than 5 minutes in a good-signal area.