The LT-501H / LT-501E series is a compact LoRa GPS tracker designed for long-life, wide-area personal and small-asset tracking. Green-Gps compatible out of the box via LoRaWAN™, the LT-501 family brings indoor/outdoor location, BLE beacon support, and configurable reporting modes to applications that require reliable telemetry and low-power operation.
Built around a Semtech SX-1276 LoRa radio and an STM32 MCU, the LT-501 supports Helium and other LoRaWAN networks in Class A and Class C operation. Its small form factor, rechargeable internal power with optional replaceable 19A battery, audible alerts and motion sensing make it ideal for lone-worker safety, anti-theft monitoring and fleet management workflows when integrated into Green-Gps for real-time tracking and centralized reporting.
Key Highlights
- Green-Gps compatible LoRaWAN tracker — supports Helium and standard LoRaWAN networks for easy cloud ingestion.
- Indoor/outdoor positioning — GPS patch antenna plus built-in BLE for beacon-based indoor positioning and hybrid location tracking.
- Long battery life — optimized for low-power transmissions with an estimated battery life up to 130 days (5‑minute GPS interval, reference only).
- Compact, rugged design — IPX7 protection, rubber-sealed cover and a 35 g lightweight body for wearable and small-asset use.
- Audible and visual alerts — onboard buzzer and multiple LEDs support help reports and local notification workflows.
- Motion-aware telemetry — integrated 3-axis accelerometer for motion detection, tamper and activity reporting.
- Flexible connectivity variants — frequency options for US/AS and EU markets (LT-501RH / LT-501RE) with internal antenna and MMCX external antenna option.
How It Works with Green-Gps
When integrated with Green-Gps, the LT-501 delivers periodic GPS positions, BLE beacon detections and motion telemetry via LoRaWAN to your Green-Gps workspace. Green-Gps ingests the device uplinks, decodes payloads, and provides real-time tracking, alerts, map visualisation and historical reports. Remote configuration from Green-Gps can switch reporting modes between regular scheduled updates and near-real-time transmissions where allowed by the network and device settings.
- Real-time location and telemetry updates delivered over LoRaWAN to Green-Gps for map tracking and history.
- BLE beacon data for improved indoor positioning and proximity events consumed by Green-Gps.
- Motion and help reports (3-axis accelerometer + function button) trigger alerts and incident workflows in Green-Gps.
- Server-side geo-fencing support — Green-Gps can evaluate location data to generate geofence entry/exit alerts.
- Power low, power off and other status messages are forwarded to Green-Gps for device health monitoring.
Technical Overview
| Connectivity | LoRaWAN™ (Class A / Class C), Semtech SX-1276 LoRa chipset; Helium-compatible |
|---|---|
| Bands | LT-501RH: US 915 MHz / AS 923 MHz variants; LT-501RE: EU 868 MHz |
| Power & Battery | Internal rechargeable power system, optional replaceable 19A battery; Micro USB charging/data port; Operation voltage DC 3.3–4.3 V, USB 4.5–5.5 V; estimated battery life up to 130 days (5-min GPS interval, reference only) |
| Interfaces | Power/reset button, function/help button, buzzer for audible alerts, multiple LEDs (Power, GPS, LoRa TX, BLE TX), built-in watchdog |
| GNSS | GPS reception via patch antenna (18 × 18 × 2 mm) with MMCX option for external GPS antenna |
| Bluetooth | Nordic BLE (slave mode) for beacon-based indoor positioning; BLE range ≈ 35 m (open environment) |
| Radio Performance | LoRa receiving sensitivity ≈ -128 dBm at 980 bps; typical LoRa transmission distance ~1–10 km at 980 bps (environment dependent) |
| Environmental & Durability | IPX7 with rubber-sealed cover; Operating temp with battery: -20 to 60°C; storage -20 to 80°C; 5–95% non-condensing humidity |
| Dimensions & Weight | 63.3 × 43.0 × 15.5 ±0.15 mm; weight ≈ 35 ±2 g |
| Certifications & Accessories | CE, FCC, Telec, LoRaWAN™ Certification, ThingPark Certification; includes Micro USB cable; optional 19A battery, external GPS antenna, 3 mm steel mounting plate |
Use Cases
- Lone-worker safety — wearable tracking with help button and audible alerts for remote monitoring through Green-Gps.
- Personal security and anti-theft — compact GPS tracker for luggage, equipment or personal items with low-power long-range reporting.
- Asset monitoring across wide areas — LoRaWAN coverage and Helium compatibility enable long-distance tracking without frequent charging.
- Indoor/outdoor hybrid tracking — BLE beacon support for indoor proximity events combined with GNSS outdoors for continuous location context.
- Telemetry and status monitoring — motion events, power alarms and device health telemetry suitable for integration into fleet management dashboards in Green-Gps.
Why Choose This Tracker with Green-Gps
The LT-501 series offers a balanced mix of long-range LoRaWAN connectivity, BLE-assisted indoor positioning and compact, rugged hardware that integrates cleanly with Green-Gps. For organizations that need low-power GPS trackers for people and small assets, the LT-501 provides the telemetry Green-Gps needs to deliver real-time tracking, incident alerts and historical reports. Its regulatory certifications and optional accessories make it suitable for scaled deployments where compliance and deployment flexibility matter.
Note on complementary features: Green-Gps users commonly combine LT-501 location and motion feeds with additional vehicle or asset sensors to support workflows such as ignition monitoring, immobilizer control or fuel monitoring. The LT-501 itself focuses on GNSS, BLE beacons and motion/power telemetry; ignition, immobilizer and direct fuel-sensor interfaces would require additional hardware or integration steps.
Set Up LT-501H
To set the tracker send the following commands by SMS messages, Format used by Green-Gps 9050FxkaKEnHZZqILqWw5F
- Setup the tracker
GSS,{{imei}},3,0,D1={{apn}},D2={{apnu}},D3={{apnp}},E0=54.85.159.138,E1=8888,A1=1*{{checksum}}!
Reboot the device GSC,{{imei}},3,0,LH*{{checksumreeboot}}!