The OTK02-4G Real Time 4G GPS Car Tracking Vehicle GSM GPRS OBD Tracker is a plug-and-play OBD II device designed for immediate installation and fast integration with Green-Gps. As a Green-Gps compatible tracker, the OTK02-4G delivers real-time tracking and OBD-level telemetry without wiring — ideal for fleet management, individual vehicle tracking, and anti-theft monitoring where quick deployment and reliable diagnostics matter.
Built around a 4G FDD LTE CAT1 cellular module with GSM/GPRS fallback and AGPS assistance, this OBD tracker reports location, mileage and engine status to the supplied web and mobile apps. The unit’s 2 MB offline logger and 150 mAh backup battery keep data flowing through GSM blind spots, giving Green-Gps users continuous historical playback and event reporting for better operational control.
Key Highlights
- Plug-and-play OBD II installation: no wiring required — install in seconds to start real-time tracking on Green-Gps.
- 4G LTE CAT1 with GSM/GPRS fallback: modern cellular connectivity for consistent telemetry and SMS reporting.
- OBD diagnostics and trip data: mileage, engine on/off status and remote diagnostic reporting via OBD interface.
- Robust offline capabilities: 2 MB flash data logger and a 150 mAh backup battery preserve data during network loss.
- Comprehensive alarms: geo-fence, towing/movement, overspeed, and battery-low alerts for anti-theft workflows.
- Fast positioning with AGPS: quicker time-to-first-fix and reliable route playback for fleet management use.
- Free web and Android app: lifelong access to tracking platform for monitoring, historical replay, and reports.
How It Works with Green-Gps
When used as a Green-Gps compatible tracker, the OTK02-4G sends GNSS positions and OBD-sourced telemetry to the Green-Gps platform (via cellular data or SMS). Green-Gps ingests location, event and diagnostic messages into dashboards and alerts so fleet managers and vehicle owners can monitor status, trigger alarms and generate reports in real time.
- Real-time location and telemetry updates delivered to Green-Gps’s web and mobile apps for live monitoring.
- Engine on/off and ignition status detected through the OBD II interface — available in Green-Gps event logs.
- Mileage and trip history reported via OBD for maintenance planning and utilization tracking.
- Alarms (geo-fence, towing/movement, overspeed, battery low) forwarded as instant notifications through Green-Gps.
- Offline logging: 2 MB flash stores data during GSM/GPRS blind spots and syncs when connection resumes.
Technical Overview
| Model | OTK02-4G |
|---|---|
| Connectivity | 4G FDD LTE (CAT1); GSM/GPRS fallback for 2G networks; SMS, GPRS data reporting |
| Bands | Specific bands not listed in product description; supports 4G FDD LTE and 2G GSM/GPRS |
| Power & Battery | Input voltage DC +9V ~ +36V / 1.5A; built-in 150 mAh backup battery |
| Interfaces | OBD II plug (vehicle diagnostics and telemetry via OBD protocol) |
| GNSS | GPS L1 1575.42 MHz; AGPS support; sensitivity -159 dB; positioning accuracy ~10 meters (2D RMS); Cold start ~42 s; Hot start ~1 s |
| Data Logger | Built-in 2 MB flash memory for offline storage in GSM/GPRS blind areas |
| Environmental | Operating temperature -20°C to 75°C; humidity 5%–95% non-condensing; altitude limit 18,000 meters |
| Form Factor | OBD II plug for vehicle use; dimensions 6.3 x 5 x 2 cm; weight 40 g |
| Software & Support | Free web tracking platform and Android app included; OEM/ODM support and two-year warranty; CE and RoHS certified |
Use Cases
- Fleet management: monitor vehicle location, route history and OBD-sourced mileage to optimize dispatch and utilization.
- Anti-theft monitoring: geo-fence and movement/towing alarms provide timely alerts for suspicious activity; integrates into Green-Gps alerting workflows and can be used alongside immobilizer solutions.
- Vehicle diagnostics and maintenance planning: OBD trip reports and engine on/off status help schedule preventive service and reduce downtime.
- Individual vehicle owners and rentals: instant installation for temporary or permanent tracking without professional fitting.
- Remote monitoring for distributed assets: fast installation for seasonal or ad hoc tracking needs where wiring is impractical.
Why Choose This Tracker with Green-Gps
The OTK02-4G combines simple OBD II plug-and-play deployment with robust telemetry and offline resilience, making it a practical Green-Gps compatible option for both single vehicles and scaled fleets. Its OBD diagnostics deliver actionable data — mileage, engine on/off events and trip logs — while AGPS and the device’s offline logger reduce data gaps for reliable real-time tracking and historical playback. For fleet managers seeking dependable telemetry, anti-theft alerts, and easy integration into Green-Gps’s dashboards, the OTK02-4G offers a low-friction solution backed by a free platform, OEM support and a two-year warranty. It complements broader monitoring strategies (including fuel monitoring workflows and Bluetooth sensor deployments available through Green-Gps integrations) without requiring complex hardware installation.
Set Up OTK02-4G
To set the tracker send the following commands by SMS messages, the sample setup the device password is VozN7H, this password is the default
- Reset to factory settings
WVozN7H,990,099### - Set the device Id, user the 14 firsts numbers from IMEI, Green-Gps uses like id the 15 IMEI digits
WVozN7H,010,{{('XXXXXXXXXXXXXX' + imei.substring(0,14)).slice(-14)}} - Set the operator APN
WVozN7H,011,{{apn}},{{apnu}},{{apnp}} - Set the GPRS server
WVozN7H,012,54.85.159.138,8888 - Switch to GPRS mode
WVozN7H,013,2 - Set the update interval
WVozN7H,014,6
To get device IMEI WVozN7H,601