> ## Documentation Index
> Fetch the complete documentation index at: https://docs.naubat.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Connecting the Dongle
> How Naubat detects and connects to compatible BLE dongles
# Connecting the Dongle
Naubat automatically detects compatible Bluetooth Low Energy diagnostic dongles that are within range and establishes communication when normal operating conditions are met.
Before continuing, make sure you already have a compatible dongle. See [Compatible Dongles](/compatibility/compatible-dongles).
The dongle is connected to the vehicle OBD-II port, which uses a standardized 16-pin trapezoidal connector shape.
This port is usually located below the steering wheel on the driver side, although location varies by model.
If you do not find it immediately, an online search for your specific vehicle model usually provides the exact location.
Important: Do not pair the dongle from the phone Bluetooth settings menu.
Always select and connect it only from the Naubat in-app connection screen.
After the dongle is connected, its BLE name becomes visible in the app connection screen.
Select the dongle from the list to start the app-to-dongle connection sequence.
When vehicle conditions are active and communication starts, the app transitions to Collecting Data.
## Operational States
### Disconnected
* Dongle not in range.
* App running in background.
* No vehicle interaction.
### Idle
* Dongle detected.
* Vehicle in rest state.
* No active data requests.
### Connected
* Phone connected to the dongle.
* No active diagnostic message exchange yet.
* Intermediate state before Collecting Data.
### Collecting Data
* Vehicle active.
* Continuous structured data requests.
* Battery and trip signals monitored.
`Disconnected -> Idle -> Connected -> Collecting Data`