FMC920/FMB920: How to connect OBD OEM and CAN Adapter elements?

Telematics Question
1

Hello,

I am reviewing the parameters that the FMB920 can send to the server. On the Teltonika Data Sending Parameters ID page for FMB920, the parameters are grouped into different sections such as OBD elements, OBD OEM elements, and CAN adapters elements.

Regarding OBD elements, this part is clear to me. As far as I understand, it is possible to use a Bluetooth OBD II dongle, connect it to the vehicle’s OBD port, pair/configure it through the Bluetooth settings in the FMB920, and then receive standard ECU data and send it to the server.

However, I have some questions about the other sections, especially OBD OEM elements and CAN adapters elements.

For receiving these parameters with the FMB920, what connection method should be used?
Is any additional hardware required?
If yes, what type of hardware should be connected to the FMB920, and how should the physical connection be made?

I also have a separate question about LV-CAN200. In some documentation, I have seen that LV-CAN200 communicates with devices via USB. On the other hand, LVCAN-related settings are also mentioned in the FMB920 Configurator / firmware.

My question is: can LV-CAN200 actually be connected to the FMB920?
If yes, how should it be connected? Is it through the USB port of the FMB920, or is a special cable/adapter required?

I would appreciate any clarification about the practical differences between OBD elements, OBD OEM elements, and CAN adapters elements for the FMB920, and what hardware and connection method should be used for each case.

2

Good Day,

The FMC920 does not support the connection of CAN adapters. Connecting an LV-CAN200 or a similar CAN adapter requires the device to have Input 5 and Input 6 pins, which are not available on the FMC920.

For further information regarding devices compatible with the LV-CAN200, please refer to the following Teltonika Telematics Wiki page:

LV-CAN200 - Teltonika Telematics Wiki

Regarding the difference between OBD, OEM and CAN Adapter elements:

  • OBD elements are standard parameters available through the vehicle’s OBD interface, such as engine RPM, vehicle speed and coolant temperature.

  • OEM elements are manufacturer-specific parameters obtained through the OBD interface. Their availability varies depending on the vehicle model and may include values such as EV state of charge or fuel level.

  • CAN Adapter elements are read directly from the vehicle’s CAN lines through a supported CAN adapter. These may include parameters such as door status, accelerator pedal position and other vehicle-specific CAN data.

Thanks, and best regards,

Imran S.

3

Dear @bmehrabani

Thank you for your detailed inquiry. To provide a clear overview of the FMB920’s capabilities and hardware boundaries, please see the details below:

1. FMB920 Capabilities Overview

  • Standard OBD Elements (Supported): You can easily connect a standard external Bluetooth OBD-II dongle wirelessly to the FMB920 to read basic ECU data.

  • OBD OEM & CAN Adapter Elements (Not Supported): While these parameters appear in the documentation and Configurator due to our unified firmware shared across multiple models, the FMB920 hardware lacks the physical CAN interface required to process this data.

  • LV-CAN200 Compatibility (Not Supported): The LV-CAN200 cannot be connected to the FMB920. The tracker’s micro-USB port is designed strictly for PC configuration and firmware updates; it cannot function as a host for external hardware accessories.

Recommendation: If your project requires raw CAN bus data or integration with the LV-CAN200, we recommend upgrading to our advanced category trackers, such as the FMB130 or FMC130, which feature dedicated communication ports for these modules.

2. Guide: Connecting a Bluetooth OBD-II Dongle

To help you get started with reading standard OBD data via Bluetooth, here is the complete procedure to connect your dongle to the FMB920.

Step 1: Hardware Requirements

Ensure you are using a compatible Bluetooth OBD-II dongle. The FMB920 supports standard external dongles built on the ELM327 or STN1110 chipsets.

Step 2: Physical Installation

  1. Locate the vehicle’s diagnostic OBD-II port (usually found under the dashboard on the driver’s side).

  2. Plug your Bluetooth OBD-II dongle firmly into the vehicle’s port.

  3. Turn on the vehicle’s ignition so that the dongle powers up and its Bluetooth radio becomes active.

Step 3: Device Configuration via Teltonika Configurator

Connect your FMB920 to your PC via USB, open the Teltonika Configurator, and follow these steps:

  1. Enable Bluetooth:

    • Go to the Bluetooth section on the left-hand menu.

    • Set BT Radio to Enable (visible).

  2. Configure Connection to the Dongle:

    • Find the Auto Connect to External Device settings.

    • Change the Connection Mode dropdown to OBDII.

    • In the External Name field, type the Bluetooth name of your OBD-II dongle (e.g., OBDII, ELM327, or DONGLE). Note: Enter at least 2 characters of the name so the FMB920 can scan and recognize it.

    • In the External PIN field, enter the pairing PIN code for your dongle (usually 1234 or 0000).

  3. Enable OBD Parameters (I/O Elements):

    • Navigate to the OBD II or I/O section in the left-hand menu.

    • Locate the parameters you wish to monitor (such as Engine RPM, Vehicle Speed, Fuel Level, or Engine Coolant Temperature).

    • Change the Priority of the desired parameters from None to Low, High, or Panic depending on how urgently you need the data sent to your server.

  4. Save Configuration:

    • Click the Save to device button at the top to write the settings to your FMB920 tracker.

Step 4: Verification

Once saved, you can disconnect the FMB920 from your PC. When the vehicle ignition is turned on, the FMB920 will automatically scan for, pair with, and lock onto the Bluetooth dongle. You can check active connections directly via the Configurator’s Status → OBD Info window, or verify the incoming data flow on your server tracking platform.

For more detailed information regarding the integration of the FMB920 and an OBD dongle, please follow this wiki link: https://wiki.teltonika-gps.com/view/FMB920_Bluetooth®_settings#How_to_connect_OBD_II_Bluetooth®_Dongle_to_FMB_device

Best regards,

Amalnath

4

Dear @amalnath

Thank you for your complete and clear explanation.

I had already tested the Bluetooth OBD-II dongle connection method with the FMB920, and I had no issue with that part. My main question was caused by the information shown on the following page:

https://wiki.teltonika-gps.com/view/FMB920_Teltonika_Data_Sending_Parameters_ID#CAN_adapters_elements

On that page, sections such as OBD OEM elements and CAN adapters elements are mentioned for the FMB920, and this led to a misunderstanding on my side, especially because CAN and LVCAN-related parameters are explicitly referenced in the documentation.

With your explanation, it is now clear that these items are displayed due to the shared firmware/configuration structure, but they are not supported by the FMB920 hardware.

Thank you again for your clarification.