TFGPSLITE02 - Compact GNSS Module for Lightweight UAVs

The TFGPSLITE02 is a compact and high-performance GNSS module designed for small, lightweight UAVs. Featuring the u-blox SAM-M8Q chipset, it provides reliable and accurate navigation by supporting multiple satellite constellations. This module integrates seamlessly with flight controllers via the Pixhawk standard “Basic GPS Port.”

Key Features

• Multi-GNSS Support: Concurrent reception of GPS, Galileo, and GLONASS.
• Compact Form Factor: 50 x 50 x 8 mm with an integrated patch antenna.
• Enhanced Performance: Designed for weak signal environments.
• Advanced Security:
  • Geofencing capabilities.
  • Spoofing detection for signal integrity.
  • Message integrity protection.
• Operational Range:
  • Maximum altitude: 50,000 m.
  • Maximum velocity: 500 m/s.
• Low Power: Optimized for efficient energy use.

Technical Specifications

Electrical Characteristics

• Input Voltage: 5 V.
• Power Consumption: Typical 30 mA.

GNSS Performance

• Cold Start Time-to-First-Fix (TTFF): 26 seconds.
• Hot Start TTFF: 1 second.
• Position Accuracy: 2.5 m CEP.

Environmental Tolerance

• Operating Temperature: -40 °C to 85 °C.
• Storage Temperature: -40 °C to 85 °C.

Interfaces

• UART and I2C through the Pixhawk Basic GPS Port.
• Configurable time pulse output (1 PPS).

Connection Details

The TFGPSLITE02 uses the Pixhawk “Basic GPS Port” for integration with flight controllers. The port pinout is as follows:

Pin	Signal	Voltage
1	VCC	+5V
2	TX (OUT)	+3.3V
3	RX (IN)	+3.3V
4	I2C SCL	+3.3V
5	I2C SDA	+3.3V
6	GND	GND

The module interfaces with the payload with the following signals:

Pin	Signal	Voltage
1	VCC	+5V
2	EXTINT (IN)	+3.3V
3	TPL (OUT)	+3.3V
4	GND	GND

Application Areas

• Lightweight UAV navigation solutions.
• Position and timing source for payloads

Integration Guidelines

1. Connect the module to the flight controller via the Basic GPS Port.
2. Configure the UART interface for 9600 baud communication.