# GP-02 GPS Breakout Board ### Overview The Boardoza GP-02 is a sophisticated multi-constellation GNSS (Global Navigation Satellite System) receiver module designed for high-precision positioning in embedded applications. At its core, it features a highly integrated System-on-Chip (SoC) architecture that combines a high-sensitivity RF front-end, a digital baseband processor, and a power-efficient 32-bit RISC CPU. Engineered for global interoperability, the module supports concurrent reception of multiple satellite systems, including GPS (USA), BDS (BeiDou - China), and GLONASS (Russia). This "multi-mode" capability significantly enhances time-to-first-fix (TTFF) and positioning accuracy, particularly in challenging environments like urban canyons where signal obstruction is common. Its robust power management and active antenna protection make it a reliable choice for automotive tracking, UAV navigation, and precision agriculture. ***
*** ### Core Technical Specifications The module is defined by the following operational parameters: * Sensing Architecture: Multi-mode GNSS SoC integrating RF, Baseband, and CPU on a single die. * Constellation Support: Capable of joint positioning using GPS, BeiDou (BDS), and GLONASS constellations. * Operating Voltage: Features a flexible input range of 3V to 5.5V DC, allowing direct operation from Li-Ion batteries or standard 5V rails. * Communication Interfaces: Supports both UART (TTL) and I2C protocols for versatile host connectivity. * Logic Levels: Critical control pins (PPS, RST, INT, SAFE) are designed to operate at 3.3V logic levels, requiring level shifting if used with 5V MCUs. * Thermal Endurance: Extremely robust industrial operating range from -40°C to +125°C, suitable for automotive and aerospace grade applications. * Physical Dimensions: A standardized 20 mm x 40 mm footprint for compact integration. *** ### Key Engineering Features #### Multi-System Joint Positioning Unlike legacy single-system receivers, the GP-02's ability to track GPS, GLONASS, and BeiDou simultaneously allows it to lock onto a higher number of satellites. This redundancy improves geometric dilution of precision (GDOP), resulting in more stable and accurate coordinate data even when parts of the sky are obstructed. #### Configurable Constellation Modes The module features hardware-selectable modes to optimize performance for specific regions. Through physical jumper configurations on the GPS-BDS and GLNSS-GPS pins, users can prioritize specific constellations (e.g., GPS+BeiDou or GPS+GLONASS) to match local satellite availability. #### Active Antenna Management The integrated RF front-end includes dedicated circuitry for active antenna detection and protection. This feature safeguards the module against antenna short-circuits and open-circuit conditions, ensuring system reliability in harsh field deployments where cabling might be compromised. *** ### Hardware Interface and Signal Mapping The breakout board simplifies connectivity through two distinct header groups: Primary Power and Communication (4-Pin Header) * VCC: Power Supply Input (3V - 5.5V). * RX: UART Receive Data pin (Input from MCU TX). * TX: UART Transmit Data pin (Output to MCU RX). * GND: Common System Ground. System Control and Configuration (5-Pin Header) * PPS: Pulse Per Second output. A precise timing signal synchronized to atomic satellite clocks, used for system synchronization. * N/F: Shutdown control pin. Keeping this high maintains normal operation; pulling it low likely enters a low-power state. * RST: External Reset input. An active-low pin with an internal pull-up used to reboot the module. * GPS-BDS: Configuration pin. Pulling High (or leaving floating) selects BDS + GPS mode. * GLNSS-GPS: Configuration pin. Pulling Low selects GPS + GLONASS mode. *** ### Applications * Automotive Navigation: In-dash navigation systems requiring high thermal stability. * Asset Tracking: Logistics monitors for shipping containers crossing multiple GNSS regions. * UAV/Drones: Flight controllers needing redundant satellite locks for stable hovering. * Precision Timing: Network time servers utilizing the PPS signal for synchronization. *** ### Board Dimensions: ![GP-02 Dimension](https://github.com/Boardoza/Boardoza_GP-02_GNSS_Satellite_Navigation_Breakout_Board/raw/main/assets/GP-02%20Dimension.png) *** {% hint style="info" %} Ready to integrate? You can purchase the **GP-02 GPS** directly from our [Online Store](https://www.robotshop.com/products/acrome-boardoza-gp-02-bds-gnss-multi-mode-navigation-receiver-module?qd=f8123b57efee8eb1e5b33e08e32f868e) . Worldwide shipping is available for engineering samples and production batches. {% endhint %}