Freematics ONE is an all-in-one and easy-to-start vehicle telematics prototyping platform. Like its predecessors, Freematics ONE comes in form of a OBD-II dongle which plugs into a car’s OBD-II port, in which, ATmega328 works as main controller connected with various peripherals giving easy access to OBD-II, GPS, 9DOF motion sensor etc with the help of a dedicated Arduino library.
- Based on original OBD-II solution from Freematics OBD-II Adapters
- Programmable as an Arduino UNO
- Access to all standard OBD-II PIDs, DTC, VIN from vehicle ECU
- G-force measurement and motion/orientation detection
- Measuring car battery voltage
- Analog signal input
- GPS positioning (by external GPS receiver)
- Data storage on microSD card (up to 32GB)
- Exchanging data with other devices by USB or BLE
- Low power mode @10mA
- OBD-II and/or GPS data logger
- OBD-II data reader for mobile Apps (BLE)
- Vehicle tracker/telemeter over GPRS
- 9DOF motion sensing
- ATmega328p main controller
- STM32 based OBD-II solution (CAN BUS, K-line, NMEA parsing)
- MPU-9250 MEMS motion sensor
- CC2541 BLE module (optional)
- Self-popping microSD slot
- xBee socket for pluggable wireless communication modules
- G7020 5Hz GPS receiver (external)
- Enclosure dimensions: 60x48x20mm
- OBD-II male connector
- microUSB port
- microSD card slot
- GPS connector (Molex)
- xBee socket (inside, 5V or 3.3V VCC)
Freematics ONE has BLE connectivity by an optional TI CC2541 BLE module hooked on the hardware serial of ATMega328p.
Freematics ONE plugs into the OBD port usually located under the steering column. To check if your vehicle is OBD-II certified, open your hood and find the sticker that looks like this:
Vehicles using following vehicle protocols are supported.
- CAN 500Kbps/29bit
- CAN 250Kbps/29bit
- KWP2000 Fast
- KWP2000 5Kbps
Freematics ONE supports geo-location positioning by external GPS receiver. GPS receiver is connected to Freematics ONE by a cable with Molex connector.
Freematics ONE has an xBee socket onboard which provides the possibility to extend its wireless communication capability with various xBee module. A ESP8266 WIFI bee adds WIFI connectivity (see this) or a SIM800L bee adds GSM/GPRS support. For 3G network connectivity, we recommend Freematics ONE+.
Freematics enters and leaves low power mode programmatically. In low power mode with all peripherals (GPS, GSM, WIFI) powered off, the power consumption is around 10mA. This prevents car battery from going flat while the main controller is still able to run code and perform low-power tasks like motion detection by MEMS sensor.
Following is the PCB layout of Freematics ONE. The schematic is here. We supply head-less (no OBD-II header) or bear PCB versions. Please contact for details.
Firmware (Arduino sketch) can be uploaded to Freematics ONE exactly the same way as for an Arduino UNO from standard Arduino IDE through USB port. Please refer to the Users Guide for related more information.
A data logger sketch is pre-loaded before shipping, your Freematics ONE will work out-of-box as a vehicle data logger which performs following tasks:
- Connect to the vehicle via OBD-II port
- Connect to the GPS receiver (if available)
- Create a new file on microSD card
- Log OBD-II, GPS, MEMS sensor data to the file (file format)
- Transmit live OBD-II, GPS, MEMS sensor data via USB and BLE
|Freematics Vehicle Data Logger V4 (Freematics ONE)||Freematics Vehicle Data Logger V3
|Generic OBD-II Dongle|
|User Programmable||Yes (via USB)||Yes (via ICSP)||No|
|Built-in MEMS Sensors||9-axis MPU-9250||6-axis MPU-6050||No|
|High Update Rate GPS||Yes (up to 10Hz)||Yes (up to 5Hz)||No (or 1Hz only)|
|xBee Module Extension||Yes (GSM, WIFI, xBee etc)||No||No|
|Mass Storage (microSD)||Yes||Yes||Some|
|OBD-II Firmware Upgrade||Yes||No||No|
|iOS Device Connectivity||Yes||Yes||Some|
|OBD-II proxy connection||SPI||Serial UART||N/A|
- Freematics ONE x 1
- Micro USB cable x 1
- Wireless module x 1 (optional, plugged-in)
- G7020 5Hz GPS Receiver x 1 (optional)
- Freematics ONE Developers Guide
- Arduino Library
- Example/Reference Code (Arduino Sketch)
- Freematics Hub