Resources
Quad-Band Multi-Constellation GNSS RTK Modem with ESP32-S3 Wi-Fi and Bluetooth 5 LE for High-Precision Positioning
The 7Semi LG290P is a high-precision GNSS RTK development board combining the Quectel LG290P quad-band GNSS module with the ESP32-S3 dual-core microcontroller. It delivers centimetre-level RTK positioning accuracy alongside 2.4 GHz Wi-Fi (802.11 b/g/n) and Bluetooth 5 Low Energy connectivity in a single, compact platform. Supporting simultaneous reception of GPS, GLONASS, Galileo, BDS, QZSS, and NavIC constellations across L1, L2, L5, and E6 bands, this board is well-suited for applications that demand reliable, high-accuracy location data with flexible wireless communication options.
The board integrates a USB-C port for power and programming, a 2-pin JST connector for an RTC backup battery to reduce Time to First Fix (TTFF), and 3 onboard LED indicators for real-time operating status. With UART interfaces, exposed GPIO pins, and compatibility with Raspberry Pi, Raspberry Pi Pico, Jetson Orin, ESP32, and Arduino platforms, the LG290P modem supports rapid prototyping and integration into embedded systems. Its built-in professional-grade anti-jamming unit and excellent urban canyon performance make it a dependable solution for field deployments where signal reliability is critical.
Key Features
- Quad-Band GNSS Support: Simultaneously receives L1, L2, L5, and E6 signals across GPS, GLONASS, Galileo, BDS, QZSS, and NavIC constellations for robust, high-accuracy positioning.
- RTK Centimetre-Level Accuracy: Achieves centimetre-level precision with fast RTK convergence time; supports PPP-B2b and PPP-HAS precise point positioning services.
- High Update Rate: Delivers up to 20 Hz position updates even in RTK mode, suitable for dynamic and real-time tracking applications.
- ESP32-S3 Dual-Core MCU: Xtensa LX7 dual-core processor optimised for IoT and edge computing, with integrated 8 KB SRAM and 8 KB Flash.
- Wi-Fi 802.11 b/g/n: 2.4 GHz Wi-Fi with 40 MHz bandwidth support for reliable wireless data transmission.
- Bluetooth 5 LE: Supports long-range communication via Coded PHY, advertisement extension, and 2 Mbps PHY for higher throughput.
- SBAS Augmentation: Compatible with WAAS, EGNOS, BDSBAS, MSAS, GAGAN, and SDCM correction systems for improved standalone accuracy.
- Anti-Jamming Unit: Built-in professional-grade NIC anti-jamming module suppresses multiple narrow-band interference sources for stable urban and field performance.
- USB-C Interface: Onboard USB Type-C port supports USB-to-UART communication and module power supply at 5 V for easy development and debugging.
- RTC Backup Battery Connector: Onboard 2-pin JST connector for connecting an RTC backup battery, reducing TTFF in repeated-start scenarios.
- Multi-Platform Compatibility: Supports Raspberry Pi, Raspberry Pi Pico, NVIDIA Jetson Orin, ESP32, and Arduino development environments.
- Onboard Indicators and Controls: 3 x LED indicators for power, GNSS, and RTK status; dedicated Reset and Boot buttons for convenient control.
- Compact and Breadboard-Compatible: Integration-friendly layout suitable for embedded prototyping and field-deployable hardware builds.
- Advanced Positioning Technologies: Supports RTKHOLD, AGNSS, PPP-HAS E6, and PPP-B2b for enhanced performance in challenging conditions.
Applications
- Precision agriculture: variable-rate application, tractor auto-steering, and field mapping
- Land surveying and geospatial data collection
- Autonomous ground vehicles and robotics navigation
- Asset tracking and fleet management systems
- UAV and drone ground-control station positioning
- Construction site monitoring and machine control
- Structural health monitoring with real-time displacement sensing
- Research and development platforms requiring high-accuracy GNSS
