Low Cost, Reliable 4G Cat-M1/NB-IoT GPS Tracker

  • Affordable and reliable, with excellent performance
  • Compact 2G or 4G Cat-M1/NB-IoT
  • Concurrent GPS and GLONASS tracking, with LNA amplified signals
  • 3D accelerometer does driver behaviour monitoring including harsh braking
  • Easy install & easy to conceal
  • Variety of inputs and outputs, including Driver ID options
  • Outputs allow for remote immobilization of assets


Vehicle and fleet tracking
Powered asset tracking
Run hour monitoring
Anchoring and security assets
Scheduled maintenance reminders
Tax and FBT monitoring

The DD2 is a compact cellular 2G or 4G Cat-M1/NB-IoT tracking device with a variety of inputs and outputs, and driver-ID capability, to cater for entry-level tracking and fleet management applications, without sacrificing performance or reliability.
Its compact housing contains the GPS and cellular antennas, and the 12-wire connector means that all of the DD2’s functionality can be easily accessed – and makes installation a breeze.

The internal backup battery provides alerts and tracking operations even when external power is removed. The 3D accelerometer and flash memory round out a product that is low cost but still packs a punch. The DD2 can simultaneously use GPS and GLONASS satellites, providing double the number of positioning satellites than standard tracking products. The result is faster acquisition and more accurate and reliable tracking.

Compact Housing

The housing clips together to make provisioning devices simple and efficient.

Dimensions: 95mm x 55mm x 17mm
Weight: 150 grams


A standard 12 wire harness is supplied with the DD2 (Power, Ground, Ignition, 2 x Digital Inputs, 1 x switched output, Driver ID, I-Button)
We have an option for an OBDII (power only) or ‘cigarette lighter’ harness
See the user manual for further harness details

Automotive Power

8V to 36V DC (max)

Operating Current:
25-50mA average (when tracking)
145mA average (battery charging)

Sleep Current

The DD2 passes stringent automotive power “load dump” tests to ensure that it will continue to operate in the harshest electrical systems. A built-in self-resetting fuse makes installation easy and safe.

Operating Temperature

On External Power
-20°C to +60°C

Below 0°C the standard internal backup battery’s ability to deliver sufficient power to operate the cellular modem is reduced. Below 0°C and above +45°C the internal backup battery will not be charged as a safety precaution due to dangers associated with charging batteries at extreme temperatures.

Concurrent GPS and GLONASS Tracking

  • Concurrent GPS and GLONASS tracking
  • 72 channel high sensitivity receiver
  • -169dBm industry leading tracking performance
  • Battery backed up for optimal hot-start performance
  • AssistNow Offline aiding data for extremely fast time-to-first-fix and performance in urban canyon environments

Low Noise GPS Amplifier (LNA)

The DD2’s GPS signals are boosted by a special low-noise amplifier (LNA). This allows the DD2 to operate where normal units will fail to receive GPS signal.

Even when designing a low-cost device Digital Technologies is not prepared to compromise on the performance of the product. You will see the difference if you compare device performance in low signal environments.

2G, or 4G

The DD2 can be manufactured for specific markets around the world with cellular modem modules approved by all the major networks.

2G Modem:

4G Modem:
uBlox SARA-R410M modem operates on all major global LTE-Cat-M1 and NB-IoT bands. These new low-power networks are specifically designed for IoT applications, providing great battery life.

Supported LTE Bands:
1-5, 6, 8, 12, 13, 17, 19, 20, 25, 26, 28

Internal Antenna

Internal GPS and cellular antennas.

Having the antennas inside the housing makes for very simple and quick installation. The DD2 has had its antennae tuned by the top laboratories to ensure optimal performance.

Backup Battery

The 200mAh LiPo backup battery allows the DD2 to continue to operate when external power is removed, allowing for power removal alerts to be sent, and tracking to continue for a period of time without external power.

3 x Digital Inputs

1 x Ignition line
2 x digital inputs with configurable pull-up / pull-down
Numerous configuration options including switches, duress/panic alerts, pulse counting and other applications

1 x Digital Output

1 x switched ground digital output, easily wired up to switch external lights, relays, buzzers, sirens, motors and other devices. The output can be used to immobilise a vehicle.

3 Axis Accelerometer

The 3 axis accelerometer allows the DD2 to detect harsh driving events (harsh acceleration, braking and cornering) and this information can be used to monitor driver behaviour and unsafe driving. It also allows the DD2 to go to ‘sleep’ when not moving, resulting in extremely low standby current.

Serial Port

The TTL serial interface allows the DD 2 to interface with external devices and peripherals, including a low-cost RFID tag reader for driver identification.

Switched Power Out

The DD2 can provide power to external sensors and devices via this power line, allowing for easy installation and doing away with the need for additional external power supplies.

Voltage: 3.5v to 4.5v
Maximum current: 200mA

Flash Memory

The DD2 has sufficient memory to store over 50,000 records in its flash memory. Normally the data will be sent to the server immediately but if the device is out of range then there is sufficient space to ensure that no data is lost – for many weeks of driving!

The flash memory is also used to store parameters, GPS aiding data, accident data, driver lists, geo-fences and other important information that needs to be securely stored.


One year manufacturer’s warranty


Peripheral Options

Dart RFID Driver ID Reader

Compact 125kHZ RFID Reader reads cards and keyfobs

  • 5cm typical read range (can read through plastic / dashboard)
  • Includes a LED and buzzer for reminding drivers to swipe their card
  • Plugs into the Molex connector on the DD2 harness
  • Compatible with the EM4001 RFID standard
  • Optional 125kHz HID reader option
  • Keyfobs available

Firmware Smarts


Auto-APN allows the DD2 to analyse the SIM card and select the correct APN details from a list that is pre-loaded in the device’s firmware. This means that the DD2 can be shipped world-wide without requiring specialist setup for SIMs.

Text Message Setup

The DD2 can also be sent text messages to setup the APN, server and other details.


The DD2 can be configured to roam across multiple networks and to automatically use the different APN details for the roaming networks.

AssistNow Offline

The DD2 will track successfully where other devices just give up.

This fantastic technology allows the GPS to predict which satellites are in orbit above it and to dramatically reduce the time-to-first-fix of the GPS, and the overall performance of the GPS, especially in ‘urban canyon’ or forested environments.

Flexible Logging Parameters

The DD2 trip logging is flexible and can be configured to log based on a variety of parameters including:

  • Elapsed time
  • Distance traveled
  • Change in heading
  • Change in speed
  • When stationary
  • Accelerometer events (harsh driving)

Accident and Rollover Detection

The DD2 uses the built-in accelerometer to detect high G impacts such as accidents and rollovers and reports these events to the server for emergency alerting.

Harsh Driving

The DD2 automatically calibrates its built-in 3 axis accelerometer and uses this to detect harsh driving events:

  • Excessive acceleration
  • Harsh braking
  • Cornering at speed

These events are logged in the DD2 along with additional event statistics that allow back-end server platforms to perform sophisticated driver profiling and scoring.

Accident Data

The DD2 keeps a second-by-second “black box” recording of valuable GPS and accelerometer data for a two hour window. This data can be automatically uploaded to the server when an accident is detected, or it can be requested manually.

Driver Identification

The DD2 supports a low-cost external RFID reader to read cards and keyfobs in order to identify drivers.

Driver Lists

The DD2 can be updated from the server with lists of Drivers that are allowed to drive the vehicle that it is installed in. When a driver or operator registers on the DD2 it will check the Driver List to see if that person is authorised to drive the vehicle. The list also includes information about the driver such as whether they can perform supervisor functions.

The DD2 can be installed to immobilise a vehicle and only allow authorised drivers / operators to drive it, or to annoy an unauthorised driver with a loud buzzer.


The DD2 has the capacity to hold hundreds of geo-fences that can be downloaded to it from the server. The DD1 can use this geo-fence information to:

  • Implement arrival and departure alerts
  • Implement speeding zones with audible warning alerts
  • Implement “No-go” and “Keep-out” areas
  • Automatically control outputs, for example to switch on warning lights when inside a special area
  • Warn drivers when approaching dangerous intersections
  • Disable data communications within intrinsically safe areas

Emulated Ignition

This setting allows the DD2 to determine that a trip has started based on accelerometer and GPS data and to automatically set the ‘ignition’ input on the device to emulate the ignition line.

This means that the DD2 can be installed with the option of not wiring in the ignition line and ‘emulating’ the ignition based on movement.

Run Detect

This setting allows the DD2 to monitor the system voltage and to detect changes in the voltage that indicate if the engine is running or not.

Please call 03 9024-9400 more information.

Click here for a datasheet: Datalink DD2 – Datasheet

Device Management – OEM Server

All Datalink Techonlogies devices are fully managed Over-The-Air (OTA) via our OEM Server web interface. The OEM Server seamlessly manages:

  • Device firmware – firmware updates can be done remotely
  • Network (administrator) parameters relating to critical communications
  • System parameters, including GPS parameters, IO configuration, logging options and general device behaviour settings
  • GPS AssistNow Offline aiding data files
  • Remote debugging of devices, including being able to trace data, view detailed debug message logs, and view a live trace of the server debug messages
  • Remote disconnect and reboot of devices
  • Driver list downloads to devices – this allows for the Driver Identification on the device to check if the RFID tag / username / PIN is valid, and for specific drivers to be allowed to drive / operate particular vehicles, for example based on licences or permits.
  • Geo-fence syncing with the devices – this allows the device to do advanced in-cab alerting and monitoring such as geo-fence arrival and departure, speed limit alerting, dangerous intersection warnings, turn on warning lights inside a geo-fence, and disable communications inside intrinsically safe zones such as gas plants.
  • Provides a command and message queueing platform to the devices and is incorporated into the remote management and debugging applications

Data Connectors

The OEM Server provides Data Connectors that forward data records on to the software platform of your choice, including Datalink Techonlogies’s own Telematics Guru platform.

If you would like to integrate the DD2 into a software system then please contact Datalink Techonlogies on 03 9024-9400 for more information on our integration protocols.