The ST4945B is a rugged LTE Cat M1 / NB‑IoT asset GPS tracker engineered for long-term, low-power monitoring and seamless integration with Plaspy. Designed for demanding outdoor deployments, the ST4945B brings reliable real-time tracking, robust connectivity fallbacks and extended battery autonomy to fleet management, container and trailer monitoring, and remote asset recovery projects.
Plaspy compatible out of the box, the ST4945B delivers real-time location, motion-based telemetry and event alerts to the Plaspy platform using TCP/UDP data streams. With IP67 protection, jamming detection, OTA firmware updates and an optional BLE 4.2 interface, this tracker is built to support anti-theft workflows, telemetry use cases and scalable fleet management deployments.
Key Highlights
- Plaspy compatible GPS tracker providing real-time tracking and telemetry over LTE Cat M1 / NB‑IoT with 2G fallback.
- Large 3.7V, 18,200 mAh rechargeable Li‑ion backup battery for extended autonomy in sleep and deep‑sleep modes.
- IP67-rated rugged housing for dust and water resistance—ideal for containers, trailers and outdoor assets.
- Built-in GPS/GLONASS with SBAS support and typical accuracy of approximately ±3 m CEP under good signal conditions.
- Advanced power management with ultra-low deep-sleep current (<10 μA) to maximize service intervals.
- Jamming detection, low-battery alerts and OTA firmware upgrades for secure, remotely managed deployments.
- Optional Bluetooth Low Energy 4.2 for local sensor pairing and maintenance, plus an optional Maintenance Server for device management.
How It Works with Plaspy
The ST4945B transmits GNSS positions and telemetry to Plaspy via TCP/UDP over LTE Cat M1, NB‑IoT or EGPRS (2G) when required. Plaspy ingests location, motion events and device status messages to provide continuous situational awareness, geofencing, historical playback and automated alerts. Integration is straightforward: the device streams standard telemetry packets that Plaspy can parse for real-time dashboards, reports and rule-based notifications.
- Real-time location and telemetry updates delivered to Plaspy for live tracking and history playback.
- Motion and accelerometer-based movement detection used for tamper, towing or cargo-shift alerts.
- Low-battery and jamming detection notifications forwarded to Plaspy for rapid operator response.
- Digital I/O and interfaces vary by model—when available they can report ignition, door/alarm events or drive external immobilizer controls (model dependent).
- Optional BLE 4.2 support for local sensor integration and Bluetooth sensors/beacons used by Plaspy for enhanced on-site telemetry.
Technical Overview
| Model | ST4945B |
|---|---|
| Connectivity | LTE Cat M1 / NB‑IoT (NB2), EGPRS (2G) fallback — TCP/UDP |
| Bands | LTE Cat M1: B1, B2, B3, B4, B5, B8, B12, B13, B18, B19, B20, B25, B26, B27, B28, B66, B85; NB2: similar coverage plus B71; EGPRS: 850/900/1800/1900 MHz |
| Power & Battery | 3.7V, 18,200 mAh rechargeable Li‑ion backup battery; charging via 12 V DC; active current ~40–60 mA; sleep <3.5 mA; deep sleep <10 μA |
| Interfaces | Flexible I/O options (variable by model); three status LEDs (network, GPS, charging); no Wi‑Fi; optional BLE 4.2 |
| GNSS | GPS + GLONASS with SBAS (WAAS, EGNOS, MSAS); ~±3 m CEP (typical, good conditions); 1 Hz update; cold start <35 s, warm <30 s, hot <1 s; sensitivity down to -167 dBm |
| Security & Management | Jamming detection, low-battery alerts, OTA firmware upgrade (FOTA); optional Maintenance Server for remote management |
| Form Factor | 125 × 90 × 50 mm; weight 523 g (700 g with holder); IP67-rated enclosure |
Use Cases
- Container and trailer monitoring: continuous location, motion alerts and tamper/jamming detection for long-haul assets.
- Fleet management: real-time tracking and telemetry for mixed fleets using LTE Cat M1/NB‑IoT with 2G fallback.
- Asset recovery and anti-theft: motion-based alarms, geofence breach notifications and low-battery alerts to accelerate recovery efforts.
- Remote equipment tracking: long battery life and IP67 protection for outdoor infrastructure and seasonal equipment.
- Local telemetry with Bluetooth sensors: optional BLE enables temperature, door or proximity sensors for site-level monitoring when paired with Plaspy.
Why Choose This Tracker with Plaspy
Pairing the ST4945B with Plaspy delivers a practical, scalable solution for organizations requiring robust GPS tracker performance in harsh environments. The combination of LTE Cat M1 / NB‑IoT coverage, EGPRS fallback and a very large backup battery minimizes maintenance visits and keeps assets visible for extended periods. IP67 protection and jamming detection increase confidence in anti-theft and recovery scenarios, while OTA updates and an optional Maintenance Server simplify lifecycle management.
For fleet management and telemetry-focused deployments, the ST4945B provides accurate GNSS positioning, motion-based reporting and optional BLE sensor support, all of which feed Plaspy’s real-time dashboards, alerts and reports. Whether you need real-time tracking, fuel monitoring or ignition/immobilizer integration (via available I/O options), this Plaspy compatible GPS tracker is built to reduce downtime, lower operating costs and improve asset security.
Set Up ST4945B
To set the tracker send the following commands by SMS messages,
the ID is the last 6 numbers of IMEI excluding the last number.
for example, if the IMEI is lD5668qcLocsXGB the device Id is uhHvFF
-
Set the operator APN and GPRS server
SA200NTW;{{('XXXXXX' + imei.substring(8,14)).slice(-6)}};02;10;{{apn}};{{apnu}};{{apnp}};54.85.159.138;8888;;;; -
Set the update interval to 60 seconds
SA200RPT;{{('XXXXXX' + imei.substring(8,14)).slice(-6)}};02;60;60;60;3;0;0;0;0;0
To check settings SA200CMD;{{('XXXXXX' + imei.substring(8,14)).slice(-6)}};02;PresetA