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L76K/LC76G GNSS Positioning Module GPS/BeiDou/GLONASS/Galileo/QZSS Multi-GNSS UART/I2C Interface
L76K/LC76G GNSS Positioning Module Product Overview
The Waveshare LC76G/L76K GNSS Positioning Modules are two high-performance Global Navigation Satellite System (GNSS) modules supporting GPS, BeiDou (BDS), GLONASS, Galileo (LC76G only), and QZSS multi-satellite systems. They enable multi-system joint positioning and single-system independent positioning, providing users with fast, accurate, and high-performance positioning. Both modules feature a built-in Low Noise Amplifier (LNA) for improved receiving sensitivity, an onboard rechargeable MS621FE lithium battery for ephemeris data retention and hot start, and two LED indicators for easy status monitoring. Comprehensive documentation and example programs are provided for Raspberry Pi, Raspberry Pi Pico, Jetson Nano, Arduino, and ESP32 platforms. The LC76G uses the AG3352 chip platform and supports both UART and I2C interfaces with EPO™ and EASY™ functions; the L76K uses the AT6558R chip platform, supports AGNSS, and offers UART interface only.
| LC76G(AB) | L76K | |
|---|---|---|
| GNSS Systems | GPS/GLONASS/Galileo/BDS/QZSS | GPS/GLONASS/BDS/QZSS |
| Chip Platform | AG3352 | AT6558R |
| L1 Receiver Channels | 47 tracking | 32 tracking / 72 acquisition |
| SBAS | Support | N/A |
| A-GNSS | Support | Support |
| Acquisition Sensitivity | -147dBm | -148dBm |
| Re-acquisition Sensitivity | -159dBm | -160dBm |
| Tracking Sensitivity | -166dBm | -162dBm |
| Cold Start TTFF | 26s (Autonomous) / 5s (With EPO™) | 30s (Autonomous) / 5.5s (With A-GNSS) |
| Warm Start TTFF | 20s (Autonomous) / 2s (With EASY™) | — |
| Hot Start TTFF | 1s | 2s |
| Position Accuracy | 1.5m CEP | 2.0m CEP |
| Velocity Accuracy | 0.1m/s | 0.1m/s |
| Acceleration Accuracy (Max) | 0.1m/s² | 0.1m/s² |
| Timing Accuracy | 30ns | 30ns |
| Update Rate (Max) | 10Hz | 5Hz |
| I2C Rate | 400Kbps (Max) | — |
| UART Baudrate | 9600~921600bps (Default: 115200bps) | 4800~115200bps (Default: 9600bps) |
| Communication Interface | UART, I2C | UART |
| Assist Functions | EPO™, EASY™ | AGNSS |
| Operating Voltage | 3.3V / 5V | 3.3V / 5V |
| Operating Temperature | -40℃ ~ +85℃ | -40℃ ~ +85℃ |
| Onboard Battery | MS621FE Rechargeable Li-Battery | MS621FE Rechargeable Li-Battery |
| Indicators | 2 LEDs | 2 LEDs |
| Dimensions | 25.5 × 30.5mm | 25.5 × 32.5mm |
| Compatible Platforms | Raspberry Pi / Pico / Jetson Nano / ESP32 / Arduino | Raspberry Pi / Pico / Jetson Nano / ESP32 / Arduino / STM32 |
L76K/LC76G GNSS Positioning Module Applications
Vehicle tracking and fleet management
Asset tracking and logistics monitoring
Security systems and anti-theft devices
Industrial PDA and GIS data collection
Drone navigation and positioning
Wearable devices and portable navigators
FAQ
Q: How do I choose between LC76G and L76K?
A: LC76G supports five constellations (including Galileo), offers higher accuracy (1.5m CEP), faster update rate (10Hz), and I2C interface, suitable for applications with higher positioning performance and interface flexibility requirements. L76K supports four constellations, provides STM32 example code, and has a wider UART baudrate range (4800~115200bps), suitable for cost-sensitive STM32 platform projects.
Q: What satellite systems are supported?
A: LC76G supports GPS, BeiDou (BDS), GLONASS, Galileo, and QZSS (five constellations); L76K supports GPS, BeiDou (BDS), GLONASS, and QZSS (four constellations).
Q: What is the positioning accuracy?
A: LC76G offers 1.5m CEP positioning accuracy; L76K offers 2.0m CEP.
Q: Does the module support ephemeris data preservation after power-off?
A: Yes. Both modules feature an onboard rechargeable MS621FE lithium battery for ephemeris data preservation and fast hot starts.
Q: What development platforms are compatible?
A: Both modules provide example code for Raspberry Pi, Raspberry Pi Pico, Jetson Nano, ESP32, and Arduino platforms. STM32 example code is available only for the L76K version.
Q: What assist positioning features does LC76G support?
A: LC76G supports EPO™ (Extended Predictive Orbit) and EASY™ (Embedded Assist System) for fast positioning in weak-signal environments, with cold start time reduced to 5s (With EPO™).
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- Part number:
- LC76G GNSS Module,L76K GNSS Module
- GNSS Systems:
- GPS/GLONASS/Galileo/BDS/QZSS,GPS/GLONASS/BDS/QZSS
- Chip Platform:
- AG3352,AT6558R
- Sensitivity (Acquisition):
- -147dBm,-148dBm
- Sensitivity (Tracking):
- -166dBm,-162dBm
- Cold Start TTFF:
- 26s(Autonomous)/ 5s(With EPOTM),30s(Autonomous)/ 5.5s(With A-GNSS)
- Hot Start TTFF:
- 1s,2s
