SinoTrack - ST-903

The SinoTrack ST-903 is an ultra-compact GPS tracker designed for discreet personal and small-asset tracking and is fully Plaspy compatible when configured to report to a Plaspy server. With a coin-size form factor, a high-sensitivity GPS and GSM antenna, and flexible reporting via SMS, GPRS and Google Maps links, the ST-903 is an economical choice for pet owners, caretakers and anyone needing reliable, small-format real-time tracking.

The ST-903 pairs easily with Plaspy by directing its data stream to a Plaspy server IP and port (settable by SMS). Its multi-mode power management (continuous, motion-triggered, and standby) balances battery life and update frequency so you can optimize for longer run-time or frequent real-time updates depending on the use case.

Key Highlights

• Ultra-compact, coin-size form factor — ideal for collars, small hides and discreet personal use.
• Built-in high-sensitivity GPS and GSM antenna for stable positioning and GSM communications.
• Large 1050 mAh internal battery with three runtime profiles: WORK (~20–24 h), MOVE (~3–5 days) and STANDBY (~5–7 days).
• Supports GPS/GPRS/GSM/SMS tracking and Google Maps link SMS location messages for quick location checks.
• Configurable server IP and port by SMS — makes the device Plaspy compatible without hardware changes.
• Geofence and overspeed alarms plus history route playback for event review and anti-theft monitoring.
• Free SinoTrack PRO app and VIP.SINOTRACK web platform included (no hidden subscription fees advertised).

How It Works with Plaspy

Integrating the ST-903 with Plaspy is straightforward because the tracker can be instructed to send GPRS position packets to any server IP and port. Use the device's SMS configuration commands to set Plaspy’s server details and APN credentials, then Plaspy will receive position and status updates for real-time tracking, alerts and history playback.

• Real-time location and telemetry updates — device sends GPS coordinates via GPRS to the configured server IP/port for Plaspy to ingest.
• Geofence and overspeed alarms — set alerts on the device or inside Plaspy to trigger notifications when events occur.
• History route playback — recorded positions can be reviewed in Plaspy for post-event analysis and route reconstruction.
• SMS-based control and fallback — ST-903 accepts SMS commands for configuration, remote positioning and IMEI checks when data connectivity is unavailable.
• Quick SMS Google Maps links — useful for immediate location checks or as a backup to Plaspy’s web/mobile interface.

Technical Overview

Use Cases

• Pet tracking — attach to a collar (collar not included) for discreet location monitoring and geofence alerts.
• Child or caregiver monitoring — small, pocketable form factor for supervised personal tracking and quick location checks via SMS or Plaspy.
• Small asset tracking — track bags, equipment or other portable items where space and weight matter.
• Event and route review — use history route playback in Plaspy or the SinoTrack platform to analyze movement after an event.
• Fallback anti-theft alerting — geofence and overspeed alarms provide basic anti-theft telemetry for compact assets.

Why Choose This Tracker with Plaspy

The ST-903 is a practical, cost-effective GPS tracker to pair with Plaspy when you need discreet, real-time tracking for people, pets or small assets. Its SMS-configurable server settings let you point the device directly at Plaspy without custom firmware, and the combination of GPRS reporting plus Google Maps SMS links means you have both automated server tracking and quick manual location checks.

Battery modes let you tailor updates to the mission: keep frequent real-time updates for short monitoring sessions, or use motion-triggered and standby modes to extend runtime for longer deployments. The device offers core telemetry such as position, motion alerts, geofence and overspeed alarms, and recorded history — features that integrate naturally into Plaspy dashboards and alert systems.

Note on capabilities: the ST-903 is optimized for personal and small-asset tracking. It does not list vehicle-oriented interfaces such as ignition inputs, immobilizer control or fuel monitoring, and it does not advertise Bluetooth sensor support. If advanced fleet management telemetry (fuel monitoring, ignition/immobilizer control) or BLE sensor integration is required, consider that the ST-903 is best suited as a lightweight complement rather than a full telematics hub.

Practical reminders: configure APN and server IP/port via the listed SMS commands to connect to Plaspy (manufacturer examples: SMS2 to set server IP/port; SMS3 to set APN). Choose a compatible 2G SIM card (SIM not included). Be aware of local IMEI registration rules in some countries and the manufacturer’s guidance on IMEI handling for market compliance.