Features

• LoRaWAN 1.0.3 compliant
• Regular/ Real-time GPS tracking
• Built-in 9-axis IMU
• Motion sensing capability
• Power Monitoring
• Tri-color LED, Alarm button
• AT Commands to change parameters

Description

The Dragino LoRaWAN GPS Tracker LGT-92 is an open-source GPS tracker based on Ultra-Low-Power STM32L072 MCU and SX1276/1278 LoRa Module.

LGT-92 includes a low-power GPS module L70 and a 9-axis IMU for motion and altitude detection. The power for both the GPS module and the IMU can be controlled by MCU to achieve the best energy profile for different applications.

The LoRa wireless technology used in LGT-92 allows the user to send data and reach extremely long ranges at low data rates. It provides ultra-long range spread spectrum communication and high interference immunity whilst minimizing current consumption. Also, it targets professional tracking services.

This GPS tracker can be set up as follows in a LoRaWAN network:

Compared to traditional GPS trackers (base on GPRS or Cellular network), LGT-92 uses much lower power consumption hence can last for a longer time. It doesn’t need cellular service; system integrator can build their tracking network base on LoRaWAN technology or Join the device to existing LoRaWAN networks.

This is powered by a 1000mA rechargeable Li-on battery and charging circuit, which targets for real-time tracking with short tracking uplink.

Also, LGT-92 is an open-source project, and it is based on the STM32Cube HAL drivers. Therefore, many libraries can be found in the ST site for rapid development.

We also offer the EU868MHz version of this GPS Tracker for the EU868MHz band. Click here to learn more about it.

Specifications

MCU: STM32L072CZT6

• Clock Speed: 32MHz
• Flash:192KB
• RAM:20KB
• EEPROM:6KB

GPS: L70R

• Acquisition: 16mA
• Tracking: 13mA
• Cold Start: <35s
• 8uA@Backup Mode
• Warm Start: <30s
• Accuracy: < 2.5m CEP
• ReHot Start: <1s

IMU: MPU9250 9-Axis

• 3-axis MEMS gyroscope
• 3-axis MEMS accelerometer
• 3-axis MEMS magnetometer
• 3.5mA operating current

LoRa:

• Frequency Range: Band 1 (HF): 862 ~ 1020 Mhz
• 168 dB maximum link budget.
• +20 dBm - 100 mW constant RF output vs.
• +14 dBm high efficiency PA.
• Programmable bit rate up to 300 kbps.
• High sensitivity: down to -148 dBm.
• Bullet-proof front end: IIP3 = -12.5 dBm.
• Excellent blocking immunity.
• Low RX current of 10.3 mA, 200 nA register retention.
• Fully integrated synthesizer with a resolution of 61 Hz.
• FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
• Built-in bit synchronizer for clock recovery.
• Preamble detection.
• 127 dB Dynamic Range RSSI.
• Automatic RF Sense and CAD with ultra-fast AFC.
• Packet engine up to 256 bytes with CRC.
• LoRaWAN 1.0.3 Specification

Supply Voltage: 5V via USB port or Internal li-on battery

Battery: 1000mA Li-on Battery power

Power Consumption:

• Sleeping Mode: 77uA
• LoRa Transmit Mode: 125mA @ 20dBm, 44mA @ 14dBm
• Tracking: Max 38mA

Operating Temperature: 40 ~ 85°C

Applications

• Logistics and Supply Chain Management
• Real-time Human Tracking

Dimensions

Parts List

1 x LoRaWAN GPS Tracker with 9-Axis IMU-LGT92 - 915MHz
1 x Micro-USB Cable