Teltonika DualCam
Introduction to the product
Teltonika DualCam is connected to FMX125 and FMU126 devices using the RS232 interface.
How to insert microSD cards
Teltonika DualCam can hold 2 x microSD cards, which are inserted on both sides of the camera (front and rear).
When the card is inserted correctly, it locks in with a "click". How the cards are inserted is depicted in the photos.
Basic characteristics
| Technical data | Description |
|---|---|
| Supported by | FMC125, FMM125, FMU125, FMU126, FMB125 |
| Day & Night Vision Effect | Day (Color), Night (Black & White) |
| Angle of View | Horizontal 120°, Vertical 70° |
| Dual Camera | Front and Rear (equal characteristics) |
| Camera casing dimensions | 126.2 x 36.6 x 36.6 mm |
| Camera mounting | Sticky tape (3M) or screws |
| Supported microSD card sizes | 16 GB, 32 GB, 64 GB |
| Electrical parameters | Description |
|---|---|
| Input voltage range | 9 ~ 36 V |
| Working temperature and humidity | Temperature: -30 °C ~ 85 °C
Humidity: <90% |
| Stand-by electric current | 60 mA |
| Function parameters | Description |
|---|---|
| Real time clock (RTC) synchronization | Available over FM (via NTP, NITZ or GNSS) |
| Picture resolution | 1280 x 720 (default) (50KB transfer period 18 sec), Configurable: 160 x 120; 320 x 240; 640 x 480; 1920 x 1080 |
| IR Distance | 2 Meters |
| Cable length | RS232 (3.5 m) |
| Video compression | H.265 |
| Video resolution | 720P (20 sec. – 6MB, transfer period ~ 320 sec.) |
| Video storage | 2psc. MicroSD card (Max 64GB up to 72 hours of video) |
Certifications & Approvals
Installation
To connect the DualCam to a supported device, you have to make sure to connect 4 PINs of the camera to the PINs of your device correctly.
| PIN NUMBER | PIN NAME |
DESCRIPTION |
|---|---|---|
| 1 | RS232-Tx | DualCam output for data transmission through RS232 |
| 2 | RS232-Rx | DualCam input for data reception through RS232 |
| 3 | VCC(9-36V) (+) | Power supply for the DualCam |
| 4 | GND (-) | Ground |
DualCam RS232 camera support
DualCam camera support was introduced from firmware version 03.27.00.Rev.100. A new RS232 mode "DualCam" was added with parameters for setting control. The details of the RS232 mode parameter are provided in the table below.
| Parameter name | Parameter ID | Parameter value |
|---|---|---|
| RS232 Mode | 151 | 18 |
Configuration version 8.1.6.0 has to be used if configuration is being made in offline mode.
Camera Feature Settings
Once this mode is enabled, new tab “Camera Settings” appears on the left sidebar. This will contain the main parameters for configuring the camera settings The parameter IDs and values are provided in the table below. Once configuration is
saved to device, these parameters are updated.
| Parameter name | Parameter ID | Parameter values | Default values |
|---|---|---|---|
| Camera Picture Resolution | 66000 | ||
| 0 - 160 x 120 | 3 | ||
| 1 - 320 x 240 | |||
| 2 - 640 x 480 | |||
| 3 - 1280 x 720 | |||
| 4 - 1920 x 1080 | |||
| Camera Picture Compression | 66001 | [0 - 100] (%) | 50 |
| OSD Display | 66002 | 0 - Disabled | 0 |
| 1 - Enabled | |||
| Video Frame Rate | 66003 | 20, 25 and 30 (frames per second) | 30 |
OSD display - On Screen Display feature displays date and time in the upper left corner of the photo. This feature can be enabled or disabled.
Camera Scenario Settings
"Camera settings" tab also contains scenario settings that trigger camera video/photo capture when specific condition is met.
| Parameter name | Parameter ID | Parameter values | Default values |
|---|---|---|---|
| Periodic Image sending | 66006 | 0 - Disabled | 0 |
| 1 - Front Camera | |||
| 2 - Rear Camera | |||
| 3 - Both Cameras | |||
| Sending interval | 66007 | [10-1800] (seconds) | 600 |
| Image Sending Trigger | 66022 | ||
| 0 - None | 0 | ||
| 2 - DIN1 | |||
| 4 - DIN2 | |||
| 8 - Crash | |||
| 16 - Towing | |||
| 32 - Idling | |||
| 64 - Geofence | |||
| 128 - Unplug | |||
| 256 - Green Driving | |||
| Video sending trigger | 66023 | ||
| 0 - None | 0 | ||
| 2 - DIN1 | |||
| 4 - DIN2 | |||
| 8 - Crash | |||
| Video duration before trigger | 66009 | [1-1800] (seconds) | 600 |
| Video duration after trigger | 66010 | [1-10] (seconds) | 5 |
| Camera Scenario Mode | 66020 | ||
| 0 - On Ignition | 0 | ||
| 1 - Always | |||
| Video source for trigger DIN1 | 66040 | ||
| 0 - None | 0 | ||
| 1 - Front | |||
| 2 - Rear | |||
| 3 - Front and Rear | |||
| Video source for trigger DIN2 | 66041 | ||
| 0 - None | 0 | ||
| 1 - Front | |||
| 2 - Rear | |||
| 3 - Front and Rear | |||
| Video source for trigger Crash | 66042 | ||
| 0 - None | 0 | ||
| 1 - Front | |||
| 2 - Rear | |||
| 3 - Front and Rear |
Periodic image sending scenario
Periodic image sending triggers photo capture from a front camera, whenever the timeout is reached (sending interval parameter).
Update: Since 03.27.03.Rev.04 firmware, Periodic Image Sending Enable/Disable switch was replaced by a camera selection:
- Both cameras deselected – periodic image sending is disabled (value 0)
- Front camera selected – front camera’s pictures will be sent periodically (value 1)
- Rear camera selected – rear camera’s pictures will be sent periodically (value 2)
- Both cameras selected – both cameras’ pictures will be sent periodically (value 3)
If the camera has not finished uploading pictures to the server, then the photo capture is skipped.
Image sending trigger
Added Image sending trigger option (works the same way as Video sending trigger just triggers image sending). Both front and rear images will be sent.
For selecting multiple options using SMS/GPRS commands, add values of every option and set that value for this parameter.
For example, to set DIN1 (2), Crash (8), and Unplug (128) scenarios as triggers, add their values (2 + 4 + 128 = 138) and set the sum as the parameter value
Camera Scenario Mode
The options On Ignition and Always determine the working mode.
On Ignition means the camera scenarios will operate the way it was up to 03.27.03.Rev.105, that is it will work only when the ignition is detected.
Always mode means the camera scenarios will work all the time, including whenever the device is in sleep mode (excepting Ultra sleep mode during which scenario is disabled). During sleep footage requests (if the network is available), periodic image sending and triggers work as well.
Warning: using Always mode, depending on the configuration, the device might wake up from sleep very frequently. That has to be taken into consideration when configuring the scenarios.
Video sending by trigger
Video sending by trigger scenario monitors the selected trigger (video sending trigger parameter) and captures video before and after the event (video duration before trigger and video duration after trigger parameters). If the previously captured video has not finished downloading, then a new video capture is skipped until the old one has been sent. When this scenario is triggered, high priority eventual record is generated with the value corresponding to what triggered the scenario. See the table below.
| Parameter name | Parameter AVL ID | Parameter value |
|---|---|---|
| SOS trigger | 499 | 0 - Server request |
| 1 - DIN1 | ||
| 2 - DIN2 | ||
| 3 - Crash | ||
| 4 - Towing | ||
| 5 - Idling | ||
| 6 - Geofence | ||
| 7 - Unplug | ||
| 8 - Green Driving |
Camera firmware version
Additional SMS/GPRS command for cameras’ firmware checking. Since both cameras are separate, there are two versions returned.
| Command | Arguments | Explanation |
|---|---|---|
| camgetver | None | Used to check firmware versions.
Returns version in the format: V<major>.<minor>.<revision>. For example, V1.9.3. Because there are two cameras, two versions are returned. The complete response would look like this: Front camera V1.9.3. Rear camera V1.9.3. If there are problems reading the version or if the camera is not responding/connected, the return would be this: The front camera camgetver failed. The rear camera camgetver failed. |
Camera request command
A new camera request has been added, which allows the server to request files from a camera. The format is as provided below in the table:
| Command | Arguments | Explanation |
|---|---|---|
| camreq: | <file_type>,<file_source>,<timestamp>,<duration>
,<domain>,<port> |
Captures appropriate file with the provided details. If the connection to server is opened, them files immediately become available for download. If not, then connection is tried to be made. If <domain> and <port> parameters are included, the device will send footage of the command to that address. |
The arguments are as follows:
- <file_type>
- 0 - Video
- 1 - Photo
- <file_source>
- 1 - Front camera
- 2 - Rear camera
- 3 - Both cameras
- <timestamp>
- Unix timestamps in decimal (not required for photo download)
- <duration>
- Video duration in seconds from provided timestamps (not required for photo download), (max 30 sec)
Structure examples:
camreq:<file type>,<file source>(if video, add ",<timestamp>,<duration>)
However, if there is a need to send to the specific server without configuring, you can add two extra parameters. The complete structure:
camreq:<file type>,<file source>(if video, add ",<timestamp>,<duration>),<domain>,port
For example: camreq:0,1,1624960616,5,212.59.13.226,7160
| Conditions | Command response | ||
|---|---|---|---|
| Request successful and server connection successful. Device is ready to send selected file | Photo request from source <1-3>.
(If photo request)
(If video request) |
Preparing to send file from timestamp <timestamp of the file> | |
| Request successful but the device was already connected to the server. Device is ready to send selected file | Already connected. Preparing to send file from timestamp <timestamp of the file> | ||
| Request received but the capture failed | Error: capture failed | ||
| Request received but the device cannot proceed with the capture and sending because ignition is off | Error: Cannot capture because ignition is off | ||
| Request received but the previously captured and prepared photo/video was not sent. New media is not captured. The device is ready to send the previous capture | Warning: Photo / Video already captured previously, trying to send it | ||
| Request received but the device was already connected to the server. New media is not captured. The device is ready to send previous capture | Already connected. Warning: Photo / Video already captured previously, trying to send it | ||
| Request received but the camera doesn’t acknowledge sent command. Nothing will be sent | Error: DualCam NAK | ||
| Request received but the camera is not connected or not working | Error: DualCam not present | ||
| Request received but the camera is not connected or not working | Error: requested file does not exist | ||
| Request received but the device cannot connect to the server | Error: connect to server | ||
| Request received but the modem is not ready for operation (network or modem issue) | Error: modem not ready to start send | ||
| Request received but the device cannot proceed with the capture and sending because the camera is being reconfigured | Cannot send, DualCam configuration is in progress | ||
| Request received but file capture time was exceeded. | Error: Media request timeout | ||
| Request received but capture completed incorrectly | Error: Media request problem | ||
| File type parameter incorrect in the request command | Error: Invalid | File Type | argument in camera request cmd! |
| File Source parameter incorrect in the request command | File Source | ||
| Timestamp parameter incorrect in the request command | Timestamp | ||
| Duration parameter incorrect in the request command | Duration | ||
| Cannot proceed with the request, ignition is off | Error: Ignition not detected! | ||
| Request command structure incorrect | Error: Invalid camera request command! | ||
| RS232 and DualCam mode is not enabled | Error: DualCam is not configured! | ||
| Front or rear camera not found | Error: Front / Rear Camera not present | ||
Camera ping transmission and TF status checking
Camera pinging was implemented to periodically check if a camera is connected to a device. This is done via “Get TF status” command for both front and rear camera every 20 seconds when ignition is on. The received result from this command is stored in two corresponding AVL elements “Front camera state” and “Rear camera state”. The following do not only store TF status, but also if response from the camera was received or not.
| Parameter name | Parameter AVL ID | Parameter values |
|---|---|---|
| Front camera state: | 498 | 0 - Camera not detected |
| 1 - No card | ||
| Rear camera state: | 497 | |
| 2 - Card mount failed | ||
| 3 - Card mounted | ||
| 4 - Card faulty |
Camera RTC synchronization
Camera RTC synchronization is done anytime the device itself is synchronized (via NTP, NITZ or GNSS).
How to read camera data from SD card
The software for reading camera data can be downloaded here
Data reading steps:
- Double-click “VideoPlayer.exe” to open the player
- When the software starts, first select the directory where the TF card files are located. Once located, click "OK". The software starts analyzing the pictures and videos existing in the TF card files.
- Software will automatically detect the video and picture in the TF card files, which will last for a few seconds and then enter the software, as shown.,
The upper part of the software is a calendar. You can choose to view whether there is a
video in the current month according to the year and month. The number of the year/month can be entered by keyboard after selecting it, and then press the “Enter” key to jump to the entered year/month. You can press 
to view the previous year/month and 
to view the next year/month. The date of the recorded video in the current month will be marked in blue. The lower part of the software is the preview interface, divided into two parts: "Video View" and "Image View".
Video View
Video view shows the video information. Left click on the date of the video in the calendar, then the following "Video View" section will show which time period there is a video, as shown. For video recording, the time period during which the video is recorded will be marked in blue.
Click on the blue part of the timeline to get the time you clicked, and the video thumbnail of the current time will be displayed in the middle of the screen. The timeline length is 24 hours and it is difficult to locate the exact number of seconds. Hold down the timeline with the left mouse button and then swipe to the right to zoom in on the timeline. For example, we need to carefully view the video at 05:00-07:00. Then, the left mouse button is pressed at the 05:00 position and slide to the right to the position of 07:00, so that this part of time can be enlarged to the entire timeline.
Note: If you need to restore, then left-click and hold the time axis to slide left.
Video Playback
Left click on the timeline will view the video thumbnail of the clicked time point, and double click the left mouse button to start playing the video from the current time. By default, the video will be played for two minutes from the selected time. If you click to find the location you want to play, you don't need to move the mouse, double click again will pop up the play form.
| Video playback interface contains | |||
|---|---|---|---|
 |
Stop button |  |
Speed up
play button |
 |
Pause button |  |
Screenshot
button |
 |
Slow down
play button |
 |
Full screen
button |
Note: Closing the current playback interface does not exit the player software.
Image view
"Image View" displays the image information (the camera saves the image in the TF card after the person takes the initiative to take the photo, here you can see the photo taken by the camera). We first click on "Image View" to switch the software to the image page.
After switching to the picture interface, you can view when the photo is taken according to the directory. As shown below, after expanding the index, we can see how many pictures in total were taken.
After the expansion, click the time of the image generation to see the preview on the left side. Clicking on the preview image will pop up the image viewing window. The size of the window is the size of the image itself. The scroll wheel zooms in and out of the picture. You can right click on the preview to save the original image to your hard disk.
Export MP4
Click the "Convert" button 
to convert the video in the TF card to MP4 and export it.
Then first select the folder you want to export to, enter the MP4 start time and end time to be exported, and then click Export, if you need, cancel the export.
Then wait for the export to complete. The time of export is not certain. Depending on the performance of the computer, it takes about 1 to 5 minutes for each 1-hour duration video.
Camera is configured if all of these conditions are met:
- RS232 mode is selected (DualCam)
- Camera was not configured since startup or one of the related parameters were changed (compression, framerate or OSD)
- Camera file transfer is not active
Active camera reconfiguration is accompanied by two consecutive camera shutter clicks.
If camera is disconnected and later reconnected, a device will detect it by periodic camera ping packet. Once camera is detected, the device will reissue the reconfiguration procedure.
Camera file transfer reconnection
If FMU1YX device has bad reception, server is not reachable or wrong server details are configured, then the device tries to open a link to a camera server few consecutive times. If no connection was possible to be established, then the connection is postponed for 30 minutes and tried again (or tried every configured sending interval if periodic image sending is enabled).
DualCam camera file transfer support
Once camera has at least one file captured, it starts connection to a remote server, which is configured by parameters “Domain” and “Port” found in the “Camera Settings” tab.
Initialization packet
On connection, a device sends an initialization packet.
| Header(0x0000) | Protocol ID | IMEI | Settings |
|---|---|---|---|
| 2 bytes | 2 bytes | 8 bytes | 4 bytes |
Protocol ID – just a reference for the protocol version that is running on a device (for server cross compatibility with older versions). Firmware FMB.Ver.03.27.00.Rev.100 and up have protocol ID 5. Settings flag contains information on what is available for download. Structure is provided below:
| Settings, 4 B | |||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Byte 3 | Byte 2 | Byte 1 | Byte 0 | ||||||||||||||||||||||||||||
| 1 | 2 | 3 | 4 | ||||||||||||||||||||||||||||
- Video, rear (%videor)
- Video, front (%videof)
- Photo, rear (%photor)
- Photo, front (%photof)
If identifier sent to a server is not valid, device disconnects.
General command structure
General communication packet structure is as in the table bellow. It consist of CMD_ID (2 bytes), Data length of a command and a payload.
| Command ID | Data length | Data |
|---|---|---|
| 2 bytes | 2 bytes | [data length] bytes |
Communication protocol
Close a session command (CMD ID 0x0000)
In case when a device connects to a server, but the server does not expect it to connect, the server will respond by sending a CLOSE command after which the connection will be terminated. This command is also used when the device connects to a server for a custom file sending and the server finishes to send all custom files to the device.
| Command ID | Data length |
|---|---|
| 0x0000 | 0x0000 |
Start file transfer command (CMD ID 0x0001)
After device received file request command from the server (0x0008) device sends START command with file data (packet count).
| Command ID | Data length | File Packets (4 bytes) | Blank field (2 bytes) |
|---|---|---|---|
| 0x0001 | 0x0006 | 0x12345678 | 0x0000 (always same value) |
File request command (CMD ID 0x0008)
After the device is connected for a file upload, the server initiates file transfer by sending a FILE REQ command.
| Command ID | Data length | File Identifier |
|---|---|---|
| 0x0008 | 2 bytes | See the table below |
The device should answer with a START command described above indicating the size and CRC of the requested file.
| File source, type | Identifier (ASCII chars) |
|---|---|
| Photo from camera, rear | %photor |
| Photo from camera, front | %photof |
| Video from camera, rear | %videor |
| Video from camera, front | %videof |
Resume file transfer command (CMD ID 0x0002)
In a response to the START command a RESUME command must be sent from server.
| Command ID | Data length | Packet offset (4 bytes) |
|---|---|---|
| 0x0002 | 0x0004 | 0x00000001 |
To begin file transfer from the start, offset should be set to 1 (4 bytes value). In case when the file transfer was interrupted, to resume file transfer, offset can be set to the desired value (1 ≤ [offset] ≤ [file packets]).
Synchronize file transfer command (CMD ID 0x0003)
In a response to the RESUME command a SYNC command is sent from device.
| Command ID | Data length | File offset (4 bytes) |
|---|---|---|
| 0x0003 | 0x0004 | 0x00000001 |
By sending the SYNC command it is ensured that the next data command will contain file data starting from the specified offset.
File data transfer command (CMD ID 0x0004)
After sending a SYNC command, a file data transfer is started by sending DATA commands.
| Command ID | Data length | File data (up to 1024 bytes) | Data CRC (2 bytes) |
|---|---|---|---|
| 0x0004 | 0x0402 | ... | ... |
A File data is split into 1024 byte parts, each part wrapped into a DATA command and is sent.
Note: if a command with a bad CRC is received, RESUME command should be sent with the last valid file offset, after receiving a RESUME command, the server will stop sending DATA commands and continue communication from “Resume file transfer” step.
CRC polynomial expression: 0x8408
The initial value, when calculating CRC, is the previously received packet (CMD ID 0x0004) CRC value.
File transfer status command (CMD ID 0x0005)
After a file transfer is completed and no more files are required from the device, a server should send a COMPLETED command to the device (this command does not work after executing repeat init command0 x0009 – in this case, the server should send a CLOSE SESSION 0x0000 command mentioned before).
| Command ID | Data length | Status (4 bytes) |
|---|---|---|
| 0x0005 | 0x0004 | 0x00000000 |
In case of the server using invalid arguments, commands or not following the file request flow, the device will send this command with a Status field set to one of the few possible error codes. A list of possible ones is provided below.
| Status value (hexadecimal) | Description | Notes |
|---|---|---|
| 0x00000000 | File transfer process completed | Sent from server |
| 0x00000002 | Failed to close GPRS | Sent from device |
| 0x00000003 | Failed to close socket | Sent from device |
| 0x00000005 | Invalid response from server to init packet | Sent from device |
| 0x00000011 | This error code forces the device to disconnect from server | Sent from device. Possible causes:
|
After a COMPLETED command device should disconnect from the server.
Initialization packet repeat command (CMD ID 0x0009)
When sent, the initialization packet is repeated. This is used, when all of the files are downloaded and an additional check is carried out for any additional files, that may have been captured during the download operation.
Query file metadata request (CMD ID 0x000A)
This command is used for retrieving extra information about a selected file. A file identifier is used to determine which file’s information will be received. File identifiers are identical and used in the same way as in the File Request Command (0x0008).
| Command ID (2 bytes) | Data length (2 bytes) | File Identifier (7 bytes) |
|---|---|---|
| 0x000A | 0x0007 | 0xFFFFFFFFFFFFFF |
Can be sent after the initialization packet or after the file transfer is complete. It is not a mandatory command and doesn’t have to be used. The response for this command is 0x000B (more details below).
Note: 0x000A command was added since 03.27.04.Rev.104 firmware version and would not work with older versions.
File metadata response (CMD ID 0x000B)
0x000B is a response command to the request command 0x000A.
Response command returns information about a specified file: file type, timestamp, trigger, and video length. Complete command’s structure:
| Command ID (2 bytes) | Data length (2 bytes) | Command version (1 byte) | File type (1 byte) | Timestamp (8 bytes) | Trigger (1 byte) | Video length (2 bytes) |
|---|---|---|---|---|---|---|
| 0x000B | 0x000D | 0xFF | 0xFF | 0xFFFFFFFFFFFFFF | 0xFF | 0xFFFF |
Note: 0x000B command was added since 03.27.04.Rev.104 firmware version and would not work with older versions.
Response command meta data:
| Data | Description |
|---|---|
| Command version | Iteration of the command itself to determine to parse of the data |
| File type | Media type for confirming which file’s metadata is received. Byte structure is the same as byte 3 in the initialization packet settings data |
| Timestamp | Timestamp at the time of the trigger. Same used in a corresponding SOS record |
| Trigger | Trigger values. Same values as video sending trigger in SOS record. |
| Video length | Duration of the video in seconds. If the file type is a photo, this value is 0x0000. |
File transfer visual flow
