The ST4915 series from ST is a rugged, long-life GPS tracker designed for unattended asset monitoring and is Plaspy compatible out of the box. Built around an ultra-high-capacity primary Li‑SOCl2 battery and modern IoT radios (LTE Cat M1 / NB‑IoT with 2G fallback), the ST4915 delivers multi-year, low-maintenance operation for trailer, container, equipment, and other remote asset deployments where reliability and battery longevity matter.
Plaspy users can add the ST4915 to vehicle and asset fleets to enable real-time tracking, telemetry collection, and event-driven alerts without frequent battery swaps. With a 56-channel u‑blox GNSS receiver, flexible I/O (ignition input, door/panic inputs), optional Bluetooth and Wi‑Fi assistance, and OTA firmware updates, the ST4915 family is optimized for fleet management, anti-theft workflows, and long-term telemetry projects.
Key Highlights
- Exceptionally long battery life: up to 10 years of autonomous operation (main model, typical reporting profile), minimizing maintenance and replacement cycles.
- Plaspy compatible: transmits GNSS and telemetry over TCP/UDP for seamless integration into Plaspy’s real-time tracking and reporting tools.
- Rugged and reliable: IP67/IP65 enclosure options, SAE‑J1455 shock/vibration compliance, and industrial temperature range for harsh environments.
- High-accuracy GNSS: 56‑channel u‑blox receiver with AGPS and ~±2.5 m CEP location accuracy under normal conditions.
- Flexible inputs and sensors: ignition input, door and panic inputs, 3‑axis accelerometer for motion detection, and optional environmental sensors.
- Low-power design: ultra-low sleep current (<10 µA deep sleep) plus configurable reporting to maximize battery life for fleet management and asset tracking.
- Optional connectivity aids: ST4915B variant adds Bluetooth 5.0 (BLE) and optional 2.4 GHz Wi‑Fi for enhanced geolocation and Bluetooth sensors integration.
How It Works with Plaspy
The ST4915 sends GNSS positions and telemetry to Plaspy using standard IoT transport (TCP/UDP). Plaspy ingests the device’s location, motion, and digital input events and makes them available in dashboards, maps, and automated workflows. Reporting intervals can be tuned in the device firmware and in Plaspy to balance real-time visibility with battery life.
- Real-time location and telemetry updates sent over LTE Cat M1 / NB‑IoT (with 2G fallback) to Plaspy servers.
- Motion and impact detection via the built‑in 3‑axis accelerometer for event-driven alerts and anti-theft monitoring.
- Ignition and door/panic inputs reported to Plaspy for engine-state monitoring and security event correlation.
- Optional Bluetooth sensors (ST4915B) and Wi‑Fi assistance enable temperature, presence, and proximity data forwarding to Plaspy.
- Telemetry channels can be used for fuel monitoring and other external sensor integrations when paired with appropriate sensors and wiring.
Technical Overview
| Models | ST4915 (standard), ST4915S (short battery), ST4915B (BLE & optional Wi‑Fi) |
|---|---|
| Connectivity | LTE Cat M1 & NB‑IoT with 2G fallback (TCP/UDP transport) |
| Bands | Wide set of global LTE Cat M1 / NB‑IoT bands; global 4G band support (specific band list varies by variant) |
| Power & Battery | Primary Li‑SOCl2 3.6V battery — main model 57 Ah; ST4915S option ~19 Ah; design for multi-year life (example: up to 10 years at limited reporting rate) |
| Power Consumption | Active: ~30–60 mA; Sleep: ~3.5 mA; Deep sleep: <10 µA |
| GNSS | 56‑channel u‑blox GNSS with AGPS; accuracy ~±2.5 m (CEP); TTFF cold <35 s, warm/hot <1 s; sensitivity: tracking -167 dBm, reacquisition -160 dBm, acquisition -149 dBm |
| Interfaces | Ignition input, panic button, door sensor inputs, magnet-powered power on/off, three LEDs (network, GPS, power) |
| Sensors | Built-in 3‑axis accelerometer; optional environmental sensors (temperature, humidity, light, barometric pressure) on select variants |
| Bluetooth & Wi‑Fi | ST4915B: Bluetooth 5.0 (BLE) optional; optional Wi‑Fi 2.4 GHz (B/G/N) for geolocation assistance |
| Remote Management | Firmware upgradeable over‑the‑air (OTA) |
| Enclosure & Durability | IP67 (without humidity sensor) or IP65 (with humidity sensor); SAE‑J1455 shock & vibration tested; operating range -30 °C to +85 °C |
| Form Factor | Standard: 62 × 258 × 61 mm; weight ≈ 714 g |
Use Cases
- Trailer and container tracking — long battery life and IP-rated enclosure enable years of unattended location reporting and anti-theft alerts.
- Heavy equipment and machinery monitoring — ignition input and accelerometer data support fleet management and maintenance planning.
- Remote asset fleets — deployable telemetry for off-grid assets where multi-year operation reduces operational overhead.
- Cold chain or environmental-aware asset monitoring (ST4915B or sensor variants) — Bluetooth sensors and optional temp/humidity sensors report environmental telemetry to Plaspy.
- Security and anti-theft workflows — motion, door, and panic inputs feed Plaspy alerts and geofence-triggered responses for rapid recovery.
Why Choose This Tracker with Plaspy
The ST4915 series pairs long-life primary battery engineering with modern IoT radios to deliver a low-maintenance GPS tracker that integrates smoothly with Plaspy for fleet management and asset monitoring. Its rugged design and proven GNSS performance provide reliable real-time tracking and accurate position fixes even in challenging environments, while ultra-low power modes and configurable reporting keep operational costs and service visits to a minimum.
For organizations using Plaspy, the ST4915 offers a scalable telemetry platform: ignition and digital inputs provide engine and door status, accelerometer data enables motion and tamper detection, and optional Bluetooth sensors expand functionality for temperature or proximity-based use cases. OTA firmware updates and standard TCP/UDP transport simplify deployment and lifecycle management, making the ST4915 a practical choice for long-term fleet management, anti-theft protection, telemetry collection, and asset tracking programs.
Set Up ST4915
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 8nUWIOzeCxE5UvW the device Id is BENsnS
-
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