Recommended Hardware

Fleet Telematics Hardware

WeighFaster integrates with Freematics open-source OBD-II telematics devices for real-time GPS tracking, engine diagnostics, and fleet monitoring. Plug-and-play with any OBD-II or HD-OBD equipped vehicle.

Plug & Play OBD-II
No Monthly Device Fees
Open-Source Firmware
Works with WeighFaster

Choose Your Telematics Device

All devices plug directly into your vehicle's OBD-II diagnostic port. No wiring, no installation labor.

Best for Fleets
Freematics ONE+ Model B OBD-II GPS Tracker
4G LTE Bluetooth WiFi

Freematics ONE+ Model B

LTE CAT-1 cellular + WiFi + BLE. Ideal for real-time fleet tracking over cellular networks. Requires SIM card for data.

$129.00
  • ESP32 dual-core processor (16MB Flash, 8MB PSRAM)
  • SIM7670 LTE CAT-1 cellular modem + SIM slot
  • u-blox M10 GNSS — GPS, GLONASS, Galileo, BeiDou
  • ICM-42627 6-axis motion sensor (G-force, motion)
  • OBD-II PIDs, DTC, VIN + CAN bus sniffing
  • WiFi 802.11 b/g/n + Bluetooth Classic & BLE
  • Car battery voltage monitoring
  • microSD slot (up to 32GB local logging)
  • Integrated buzzer for driver alerts
  • 60 × 48 × 20mm — plugs directly into OBD-II port
Best for: Trucks and service vehicles that need always-on cellular GPS reporting, geofence alerts, and live driver tracking on the WeighFaster dispatch map.
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Heavy Duty
Freematics ONE+ Model H Heavy Duty OBD-II Tracker
4G LTE CAT4 Bluetooth J1939

Freematics ONE+ Model H

Heavy-duty 12V/24V with HD-OBD connector. 4G LTE CAT4 for high-speed data. Supports SAE J1939 protocol for commercial trucks.

$150.00
  • ESP32 dual-core processor (16MB Flash, 8MB PSRAM)
  • SIM7600A-H or SIM7600E-H 4G LTE CAT4 modem
  • Supports 12V passenger and 24V heavy-duty vehicles
  • SAE J1939 PGN/SPN + standard OBD-II protocols
  • u-blox M10 GNSS — multi-constellation positioning
  • ICM-42627 6-axis motion sensor
  • WiFi 802.11 b/g/n HT40 + Bluetooth dual mode
  • HD-OBD (Type B) male connector for commercial vehicles
  • microSD slot (up to 32GB), microUSB port
  • 60 × 48 × 20mm — compact plug-in form factor
Best for: Class 6–8 commercial trucks, roll-off vehicles, and heavy equipment with 24V systems and J1939 diagnostic buses used in waste and recycling fleets.
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Freematics ONE+ Model A OBD-II Device
Bluetooth WiFi

Freematics ONE+ Model A

WiFi + BLE base model. Pairs with driver's phone via Bluetooth for data relay. Optional cellular module via xBee socket.

$79.90
  • ESP32 main controller (16MB Flash, programmable)
  • WiFi 802.11 b/g/n + Bluetooth Classic & BLE
  • OBD-II PIDs, DTC, VIN + CAN bus sniffing
  • ICM20948 motion sensor
  • u-blox M10 GNSS (external receiver, optional)
  • xBee socket for optional cellular module
  • Car battery voltage monitoring
  • microSD slot, microUSB port, SIM slot
  • Ultra-low power: 20mA idle / 50mA WiFi active
  • 60 × 48 × 20mm — standard OBD-II connector
Best for: Budget-conscious fleets using the WeighFaster driver app on phones. The device transmits via BLE to the driver's phone, which relays data to WeighFaster over cellular.
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Freematics ONE Original OBD-II Device
Original F1

Freematics ONE (Original)

ESP32-based OBD-II dongle. WiFi + BLE. Flash firmware via Freematics Builder over USB. No printed serial — Device ID from ESP32 chip.

$79.90
  • ESP32 MCU @ 160MHz (programmable via USB)
  • WiFi 802.11 b/g/n + Bluetooth BLE
  • OBD-II PIDs, DTC + CAN bus
  • Standalone GNSS receiver
  • MicroSD card slot for local storage
  • Motion sensor (accelerometer/gyro)
  • MicroUSB port for firmware flash
  • Firmware configured via Freematics Builder
Best for: Getting started with OBD-II telematics on a budget. Requires Freematics Builder to flash firmware and set WiFi/server config. Works with WeighFaster via WiFi HTTP.
Order from Freematics →

How It Works with WeighFaster

1. Plug In

Insert the Freematics device into your vehicle's OBD-II port. No wiring or mechanic needed.

2. Connect

Insert a SIM card for cellular models, or pair via Bluetooth to the driver's phone.

3. Register

Add the device in WeighFaster's OBD Device Manager and assign it to a vehicle. View Setup Guide →

4. Track

Real-time GPS, speed, fuel, and engine data streams into WeighFaster's live map and dispatch board.

Comparison

Choose the right device for your fleet needs

Feature ONE (F1)
$79.90		 Model A
$79.90		 Model B
$129.00		 Model H
$150.00
Cellular Data—Optional add-onLTE CAT-14G LTE CAT4
WiFi✓✓✓✓
Bluetooth (BLE)✓✓✓✓
Built-in GPS/GNSS✓External only✓✓
OBD-II (12V Cars)✓✓✓✓
HD-OBD (24V Trucks)———✓
SAE J1939———✓
CAN Bus Sniffing✓✓✓✓
Motion Sensor✓✓✓✓
microSD Storage✓✓✓✓
Buzzer (Alerts)——✓✓
Firmware ConfigFreematics BuilderWeb portalWeb portalWeb portal
Recommended ForBudget starterPhone-tethered trackingGeneral fleet trackingHeavy-duty commercial
Do It Yourself

Self-Setup Shopping List

Everything you need to order from Freematics to provision and flash your own devices — no middleman required.

Per-Vehicle Items

Order one of each for every vehicle

  • Freematics OBD-II Device

    Choose based on your fleet needs: Model B ($129), Model H ($150), Model A ($79.90), or ONE F1 ($79.90). See comparison above for details.

  • SIM Card Cellular models only

    Required for Model B and Model H. Any carrier with 4G LTE coverage works (data-only SIM is fine). ~30-50 MB/month per device.

One-Time Setup Equipment

Buy once, use for all your devices

  • MicroUSB Data Cable

    For connecting the device to your computer to flash firmware. Any microUSB data cable works — just make sure it's a data cable, not charge-only. Freematics also sells one in their store if you need it.

    Freematics Accessories Store →
Optional: OBD-II Emulator

The Freematics OBD-II Emulator lets you bench-test devices at your desk without needing a truck. Nice to have for testing, but not required for flashing firmware.

No special adapter needed: Flashing is done through the device's own built-in microUSB port. Just plug the USB cable directly into the Freematics device — no emulator or special adapter required.

Getting Started in 5 Steps

From purchase to live tracking

1

Order

Order your Freematics device + a microUSB data cable

2

Connect

Plug the device into your computer via its built-in microUSB port

3

Flash

Flash firmware using WeighFaster's web flasher or Freematics Builder

4

Configure

Set the server endpoint to point to your WeighFaster instance

5

Deploy

Plug into your vehicle's OBD-II port and start tracking

For detailed step-by-step instructions after purchasing:

OBD Setup Guide Firmware Manager

Frequently Asked Questions

For the Model B and Model H (cellular models), yes — you'll need a data SIM card. Any carrier with 4G/LTE coverage works. Typical data usage is under 50MB/month per device. The Model A and the original ONE (F1) use WiFi or Bluetooth — no SIM needed.
Plug the device into your vehicle's OBD-II port, then go to Assets > OBD Devices in WeighFaster. Use the Setup Wizard for guided step-by-step registration, or click Add Device to enter the serial number manually. Assign it to a vehicle, and the system will begin receiving telemetry data within minutes. For detailed WiFi, Bluetooth, and cellular configuration, see our interactive Setup Guide.
Model B is our top recommendation for most fleets — it has built-in 4G LTE, GPS, and works independently without needing the driver's phone. Model H is required for Class 6–8 trucks with 24V electrical systems and J1939 diagnostic protocols. Model A is the budget option that pairs with the driver's phone for data relay. The Freematics ONE (F1) is a budget starter — it uses WiFi and requires firmware flashing via Freematics Builder.
Just two things: the Freematics OBD-II device itself and a microUSB data cable (not charge-only) to connect it to your computer for firmware flashing. For cellular models (B and H), you'll also need a SIM card. Flashing is done through the device's built-in microUSB port — no special adapter or emulator needed. Optionally, an OBD-II Emulator is handy for bench-testing at a desk. See our Self-Setup Shopping List for the full breakdown, then follow the Setup Guide and Firmware Manager for step-by-step instructions.
No. WeighFaster's $1,500/month platform fee includes unlimited OBD devices, unlimited vehicles, and unlimited users. The only hardware cost is the one-time purchase of the Freematics device itself.
Real-time GPS coordinates, vehicle speed, RPM, engine load, coolant temperature, fuel level, odometer readings, battery voltage, G-force events (hard braking, sharp turns), DTC fault codes, and VIN. This data powers live tracking, HOS compliance, fuel analytics, geofence alerts, and driver scorecards.

Need Help Choosing?

Our team can recommend the right Freematics devices for your fleet size, vehicle types, and coverage requirements.

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