E108-GN03 Dual-Mode GPS BD GNSS Module

The E108-GN03 series is a high-performance, highly integrated, and cost-effective multi-mode GNSS(Global Navigation Satellite System) satellite positioning and navigation module. Based on the AT6558R solution, it supports GPS, BDS, GLONASS, and GNSS, making it ideal for a wide range of applications, including vehicle navigation, smart wearables, and drones.

With its compact size and low power consumption, the E108-GN03 series ensures reliable performance while minimizing energy usage. It is designed with software and hardware interfaces that are fully compatible with other module manufacturers, significantly reducing development time for users.

The module supports UART and GPIO interfaces for seamless connectivity with peripherals, and customization options for I2C and SPI interfaces are available upon request.

Variants like the E108-GN03D and E108-GN03S maintain these core features, offering flexible solutions for diverse GNSS positioning and navigation needs.

The GNSS Satellite Navigation Module is a high-performance solution designed for versatile positioning applications, such as vehicle navigation, smart wearables, and drones. Built with advanced technology, it offers exceptional compatibility and accuracy, making it an ideal choice for a wide range of GNSS positioning needs.

Model / Parameter	E108-GN03	E108-GN03S	E108-GN03D
Satellite System	GPS/BDS/GLONASS
Receiving Frequency	BDS B1, GPS L1, GLONASS L1
Operating Temperature	-40 ~ +85°C
Operating Voltage	2.7~3.6V
Cold Start Time	≤32s
Hot Start Time	≤1s
Reacquisition Time	≤1s
Horizontal Position Accuracy	2.5m
Speed Accuracy	0.1m/s
Timing Accuracy	30ns
Sensitivity	Cold Start -148dBm, Hot Start -156dBm, Reacquisition -160dBm, Tracking -162dBm
Baud Rate	4800~115200bps
Protocol	Supports NMEA0183 V4.1 and earlier versions
Communication Interface	UART
Acquisition Current	25mA	26mA	24mA
Tracking Current	25mA	26mA	24mA
Sleep Current	64uA	57uA	0.3uA
Antenna Interface	Stamp Hole	Stamp Hole	Ceramic antenna

Features

Multi-System Compatibility
- Supports BDS, GPS, and GLONASS for multi-system joint positioning or independent single-system operation.
- Compatible with all satellites of Beidou-2 and Beidou-3 constellations.
High Sensitivity and Accuracy
- Tracking sensitivity: -162dBm
- Recapture sensitivity: -160dBm
- Hot Start: -156dBm
- Cold Start: -148dBm
- Provides reliable positioning even in challenging environments.
Fast and Responsive
- Maximum positioning update rate of 10Hz, ensuring real-time data for dynamic applications.
- Supports A-GNSS (Assisted GNSS) for enhanced performance in weak signal areas.
Powerful Processing
- Equipped with a 32-bit RISC CPU for efficient operation.
- Supports PPS (Pulse Per Second) output for precise timing synchronization.
Flexible Output Formats
- Supports NMEA0183 V4.1 and earlier versions for seamless integration with various systems.
Developer-Friendly Design
- Offers software and hardware interfaces that are compatible with other manufacturers, significantly reducing development cycles.
- Ensures quick and smooth integration into existing projects or systems.

Applications

Vehicle Navigation: Provides accurate and reliable GNSS data for automotive applications.
Smart Wearables: Compact design and low power consumption make it ideal for portable devices.
Drones: High sensitivity and multi-system support ensure precise and responsive navigation.

HardWare Overview

E108-GN03

Pin number	Pin name	Pin direction	Pin usage
1	GND	–	modular ground
2	TXD	output	Serial port output, 3.3V level
3	RXD	enter	Serial port input, 3.3V level
4	1PPS	output	1 Pulse Per Second
5	ON_OFF	enter	Sleep control pin, maintains high level during normal operation (internal pull-up), enters sleep mode when low level
6	V_BCKP	enter	RTC power supply, can charge external battery, internal 100Ω resistor in series
7	NC	–	–
8	VCC	enter	Module power supply, power supply range: 2.7V-3.6V
9	RESET_N	enter	Reset pin, external reset input, internal pull-up, must be left floating if not used
10	GND	–	modular ground
11	RF_IN	enter	Antenna interface
12	GND	–	modular ground
13	ANT_ON	output	Active antenna power supply control, used for external active antenna switch control
14	VCC_RF	output	RF power supply and detection, used to power active antennas (the output power supply voltage is equal to VCC)
15	NC	–	–
16	NC	–	–
17	NC	–	–
18	MODEL_SET	enter	Satellite system mode selection, when high level or floating, it is BDS + GPS, when low level, it is GPS + GLONASS

E108-GN03S

Pin number	Pin name	Pin direction	Pin usage
1	NC	–	–
2	MODEL_SET	Input	Satellite system mode selection, when high level or floating, it is BDS + GPS, when low level, it is GPS + GLONASS
3	1PPS	output	1 Pulse Per Second
4	ON_OFF	Input	Sleep control, maintain high level during normal operation (internal pull-up), enter sleep mode when low level
5	NC	–	–
6	NC	–	–
7	NC	–	–
8	RESET_N	Input	Reset pin, external reset input, internal pull-up, must be left floating if not used
9	VCC_RF	output	RF power output, used to power active antennas (the output power voltage is equal to VCC)
10	GND	–	modular ground
11	RF_IN	Input	Antenna interface
12	GND	–	modular ground
13	GND	–	modular ground
14	ANT_ON	output	Active antenna power supply control, used for external active antenna switch control
15	NC	–	–
16	NC	–	–
17	NC	–	–
18	NC	–	–
19	NC	–	–
20	TXD	output	Serial port output, 3.3V level
21	RXD	Input	Serial port input, 3.3V level
22	V_BCKP	input/output	RTC power supply, can charge external battery, internal 100Ω resistor in series
23	VCC	Input	Power pin, power supply range: 2.7V-3.6V
24	GND	–	modular ground

E108-GN03D

Pin number	Pin name	Pin direction	Pin usage
1	ON_OFF	Input	Sleep control, maintain high level during normal operation (internal pull-up), enter sleep mode when low level
2	1PPS	output	1 Pulse Per Second
3	GND	–	modular ground
4	TXD	output	Serial port output, 3.3V level
5	RXD	Input	Serial port input, 3.3V level
6	VCC	Input	Module power supply, power supply range: 2.7V-5.5V

Environmental Sensors

Position Sensors