AT21-4G

The AT21-4G is a rugged, solar-powered 4G GPS tracker engineered for long-term remote asset monitoring and is fully Green-Gps compatible. Built for trailers, containers, boxcars, mining equipment and other stationary or remote assets, the AT21-4G combines durable IP67 protection, a large integrated solar panel and a 10,000 mAh Li‑polymer battery to deliver continuous, low-maintenance telematics where permanent DC power is not available. When paired with Green-Gps, the AT21-4G provides reliable real-time tracking, telemetry and event alerts that fleet managers and asset custodians depend on.

Designed for simple installation and efficient power management, the AT21-4G supports DC input (9–45 V) and solar-only operation, with optional magnets for metal-surface mounting. The device streams location and sensor data over LTE Cat 1 (with automatic fallback to WCDMA/EDGE/GPRS) via UDP, TCP or SMS, and stores offline logs on its internal flash. Integrated multi-GNSS positioning and low-power modes make it ideal for long-term deployments that require accurate positioning, anti-theft monitoring and remote immobilizer or ignition status via configurable I/O — all easily visualized and managed in Green-Gps.

Key Highlights

• Solar-powered autonomy with integrated large panel and 10,000 mAh Li‑polymer battery for long deployments without DC power.
• Green-Gps compatible for real-time tracking, telemetry, event alerts and historical playback via UDP/TCP/SMS data feeds.
• Rugged IP67 PC+ABS enclosure with optional removable magnets for quick rooftop or exposed-surface installation.
• Multi-GNSS (GPS/BeiDou/GLONASS/Galileo/SBAS/QZSS) for faster fixes and improved accuracy (~2.0 m CEP, -167 dBm sensitivity).
• Ultra-low power MCU and multi-mode sleep logic (normal, sleep, deep sleep, beacon) to minimize current draw and extend autonomous life.
• Flexible telemetry and sensor support: 1-wire temperature sensor, optional TPMS, long-range RFID and analog/digital I/O for fuel, ignition or immobilizer control.
• Reliable cellular connectivity: LTE Cat 1 with regional band kits and automatic fallback when 4G is unavailable.

How It Works with Green-Gps

The AT21-4G integrates with Green-Gps by sending location, sensor and event data over UDP, TCP or SMS to Green-Gps’s ingestion endpoints. Green-Gps parses incoming packets and combines them with the platform’s mapping, alerting and reporting features to deliver real-time tracking and fleet management insights. Internal offline logs (16 MB) and configurable reporting intervals let the device optimize power consumption while ensuring Green-Gps receives the data it needs for situational awareness.

• Real-time location and telemetry updates transmitted to Green-Gps for live tracking and route playback.
• Digitally monitored ignition and digital I/O can be used for alarm events, ignition status and remote immobilizer control when configured.
• Fuel monitoring and analog-sensor telemetry via the analog input to support fuel-level reporting and consumption analysis.
• Offline logging and store-and-forward on the device allow Green-Gps to reconstruct historical tracks after connectivity gaps.
• Sensor integration: DS18B20 1-wire temperature monitoring, optional TPMS for tire pressure telemetry and long-range RFID for tag-based asset ID — Green-Gps aggregates these inputs alongside GPS data. For Bluetooth sensors, Green-Gps can correlate BLE data when a separate BLE gateway is present in the deployment.

Technical Overview

Use Cases

• Trailer and container tracking where long battery life and solar charging eliminate the need for wired power.
• Boxcar and rail asset supervision requiring multi-GNSS accuracy and durable IP67 protection against weather and dust.
• Mining equipment and remote machinery monitoring where DC power is intermittent and telemetry must continue through long gaps.
• Fleet anti-theft and immobilization: monitor ignition and use digital I/O for immobilizer control as part of Green-Gps-triggered theft-response workflows.
• Cold-chain or environmental monitoring with DS18B20 temperature sensors and optional TPMS for trailer tire condition reporting.

Why Choose This Tracker with Green-Gps

Choosing the AT21-4G for Green-Gps deployments delivers a reliable, low-maintenance telematics solution for remote assets. Its integrated solar charging and large battery capacity reduce maintenance visits, while ultra-low-power MCU modes extend field life. Multi-GNSS accuracy and LTE Cat 1 connectivity ensure consistent real-time tracking and telemetry for fleet management, anti-theft monitoring and operational reporting. The device’s configurable analog and digital I/O, 1-wire sensor support and offline logging make it flexible for fuel monitoring, temperature telemetry and immobilizer use cases. When combined with Green-Gps’s mapping, alerts and reporting, the AT21-4G becomes a powerful building block for scalable, resilient asset-tracking programs.