S921 Fixed Home Base Station

The S921 is a compact fixed home base station engineered to extend and harden supervised monitoring systems. Designed to pair with Megastek ankle trackers (for example MT200X and MT65) and to integrate with monitoring platforms such as Green-Gps, the S921 provides reliable at‑home presence detection, local connectivity, and multiple alarm signals to ensure continuous, auditable supervision for residential or facility deployments.

As a Green-Gps compatible base station option, the S921 enhances real‑time tracking and telemetry by reporting "at home" presence when a paired ankle tracker is within its 15–20 meter detection range. Installed in a permanent position inside a residence or facility, it provides backup communications, tamper and SOS alarms, and automated home‑zone reporting so monitoring teams get timely, actionable status updates.

Key Highlights

• Green-Gps compatible home‑zone detection: automatic "at home" status reporting when the paired ankle tracker is in range.
• Multi‑mode cellular connectivity (2G/3G/4G) plus Wi‑Fi link to the ankle tracker for robust server communication.
• Comprehensive alarm suite: power‑off, SOS emergency, tamper/remove, hit/impact and regular heartbeat reporting for integrity monitoring.
• Internal backup battery for continued operation during mains interruption, reducing false offline events.
• Compact, fixed form factor for discreet permanent installation inside residences or supervised facilities.
• Designed to integrate with telmatics and monitoring platforms for centralized real‑time tracking, telemetry and reporting.

How It Works with Green-Gps

The S921 acts as a local presence gateway between the ankle tracker and the monitoring backend. When paired and within approximately 15–20 meters, the S921 detects the ankle unit over a local wireless link and reports an "at home" status to Green-Gps. If the ankle tracker moves out of range, the base station stops detecting it and Green-Gps receives the outdoor location from the ankle tracker itself, enabling continuous real‑time tracking.

• Real‑time location and telemetry updates to Green-Gps: home‑zone presence vs. outdoor GPS from the ankle tracker.
• Alarm status reporting: power‑off, SOS, tamper/remove and hit/impact alarms are forwarded to the server for alerting and workflows.
• Heartbeat packages: periodic status packets ensure Green-Gps receives regular device health checks.
• Platform‑level features: when used with compatible ankle units and Green-Gps, the combined system supports telemetry dashboards, event reporting and rule‑based alerts for supervised environments.
• Complementary sensor support: the S921 uses a Wi‑Fi link for local detection; Bluetooth sensors or additional telemetry (fuel monitoring, ignition, immobilizer functions) are handled by the paired tracker or the monitoring platform if those devices support them.

Technical Overview

Use Cases

• Parole or home confinement monitoring — automated "at home" reporting to Green-Gps combined with tamper and SOS alarms for supervised release programs.
• Assisted living and care facilities — verify presence in residence, receive fall/hit alerts and streamline caregiver response through central telemetry.
• Residential detention or house arrest — reliable local detection to reduce false outdoor position reports and to enforce home‑zone rules.
• Facility perimeter monitoring — deploy S921 as fixed anchors to complement ankle tracker outdoor GPS, improving accuracy of indoor/outdoor status.

Why Choose This Tracker with Green-Gps

The S921 base station brings practical value to Green-Gps deployments by improving home‑zone accuracy, providing multiple alarm types, and maintaining connection continuity with internal battery backup. Its fixed installation and straightforward pairing with supported ankle trackers make it a low‑maintenance component that reduces false alerts and simplifies supervised‑monitoring workflows. When connected to Green-Gps, operators gain centralized real‑time tracking, telemetry, and alerting — enabling rapid responses, clear audit trails, and easier compliance with supervision policies.

Choose the S921 with Green-Gps when you need a dependable, professionally integrated home base station that focuses on presence detection, alarm integrity, and seamless server reporting for supervised residential monitoring. For installations, follow the manufacturer’s guidance on fixed placement, pairing, and routine testing of connectivity and battery backup to ensure continuous monitoring performance.