SparkFun Quadband GNSS RTK Breakout
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SparkFun introduces Quadband GNSS RTK Breakout board with Quectel LG290P module for high-precision navigation

SparkFun has released the Quadband GNSS RTK Breakout featuring the Quectel LG290P module designed for high-precision real-time kinematic (RTK) applications. It supports GPS, GLONASS, Galileo, BDS, QZSS, and NavIC constellations, with the ability to simultaneously receive signals from L1, L2, L5, and L6/E6 frequency bands. The module includes support for SBAS augmentation systems (e.g., WAAS, EGNOS, GAGAN) and PPP services (e.g., BDS PPP-B2b, QZSS CLAS), delivering reliable positioning with fast convergence times for precision navigation tasks. The breakout board offers a compact design (43.2 x 43.2mm) and multiple expansion options including 24 PTH pins, dual 4-pin JST Qwiic connectors, three UART interfaces, a USB-C connector, and additional PTH pins for BlueSMiRF/Serial-to-UART. With its RTK support and advanced GNSS capabilities, the board is ideal for applications requiring high-accuracy positioning and robust navigation performance. Previously, we covered several GNSS boards including the SparkFun GNSS L1/L5, u-blox EVK-LEXI-R10, and Conexio Stratus Pro and […]

Sparkfun RTK EVK
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SparkFun RTK EVK offers GNSS with centimeter accuracy, WiFi, Bluetooth, 4G LTE Cat 1, and Ethernet connectivity

SparkFun RTK EVK is a fully-enclosed GNSS platform designed for fixed or mobile high-precision positioning and navigation applications with centimeter accuracy thanks to RTK (real-time kinematic) technology implemented with modules from u-blox. About two months ago, Sparkfun introduced the RTK Torch waterproof GNSS surveyor with Unicore UM980 GNSS module with RTK support, ESP32 for WiFi/Bluetooth, and an STM32WLE5C LoRa SoC. The  SparkFun RTK EVK (evaluation kit) may drop LoRa connectivity, but it’s a more versatile platform with WiFi, Bluetooth, Ethernet, and LTE Cat 1 cellular connectivity, besides support for L1 + L2 RTK GNSS with L-Band correction. Sparkfun RTK EVK specifications: GNSS Receiver – u-blox ZED-F9P Concurrent reception of GPS, GLONASS, Galileo, and BeiDou Receives both L1C/A and L2C bands 184-channel u-blox F9 engine Time to First Fix: 25s (cold), 2s (hot) Max Navigation Rate: 20Hz / 25Hz depending on mode Horizontal Position Accuracy: 2.5m without RTK; 0.010m with RTK […]

Graperain Samsung, Rockchip, and Qualcomm CPU modules, SBCs, and carrier boards
GPS 24672 RTK Torch
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SparkFun RTK Torch is a compact and waterproof GNSS surveyor with RTK functionality

SparkFun’s RTK Torch is a real-time kinematic (RTK) surveying device that offers tri-band reception, tilt compensation, and millimeter accuracy in a portable, waterproof enclosure. It features an ESP32-WROOM module with 16MB flash and 2MB PSRAM, providing Wi-Fi and Bluetooth functionality. The onboard RTK-capable Unicore UM980 module receives various GNSS frequencies with high accuracy and supports all available constellations and frequencies. Also included is an STMicroelectronics STM32WLE5CCU6 MCU for obtaining corrections via LoRa radio. The RTK Torch builds on the earlier RTK Facet, adding improvements such as wider reception, higher precision, and a more portable form factor. Like the Facet, the RTK Torch comes in a bundle that includes a carrying case, a 3m USB C-to-C charging cable, a 65W PD wall adapter, and a 1/4in. to 5/8in. antenna thread adapter. It supports several operating modes including GNSS Positioning (~800mm accuracy) – also known as ‘Rover’ GNSS Positioning with RTK (8mm […]

Raspberry Pi 4 RTK GNSS rover
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Affordable RTK GNSS receiver supports USB or/and Ethernet interfaces (Crowdfunding)

HYFIX’s RTK Rover is an affordable, centimeter-accurate RTK (Real-time Kinematic) GNSS receiver with either a USB interface or/and Ethernet connectivity with the latter relying on a Raspberry Pi 4 SBC. As a reminder, RTK relies on traditional GNSS networks like GPS and works with a Base station at a fixed location and a Rover station that can be fitted to a drone or mobile robot in order to determine the position with up to one-centimeter accuracy. The RTK Rover from HYFIX is equipped with a dual-band LC29H GNSS module from Quectel and an onboard IMU sensor that tracks position through dead reckoning when GNSS connectivity is lost. RTK Rover specifications: MiniPCIe card with Dual-Band L1/L5 RTK Receiver (Quectel LC29H) Antenna – External antenna (6x5x2 cm) connected to SMA connector Sensor – IMU Interfaces USB Type-C port for power and serial Interface Ethernet Rover Kit only – Gigabit Ethernet and  USB ports […]

ROCK Base RTK network base station
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ROCK Base triple-frequency RTK/GNSS base station works with Web3 GEODNET decentralized network

ROCK Robotic has announced the ROCK Base triple-band multi-constellation RTK/GNSS base station that works with the Web3 GEODNET decentralized GNSS reference network, with the solution designed to offer centimeter accuracy to support applications such as civil surveying, high-definition mapping, digital twin creation, and robotic solutions. Real-time Kinematic (RTK) is a relative positioning technique relying on GNSS (GPS,  Galileo, GLONASS, Beidou …) and allowing centimeter positioning accuracy. The technique requires an RTK “Base station” like the ROCK Base and a lower-cost “Rover station” typically attached to a vehicle or drone. For higher accuracy, it’s also possible to use a Network RTK: Network RTK is based on the use of several widely spaced permanent stations. Data from reference stations is combined in a common data processing in a control center. The control center computes corrections for the spatially correlated errors within the network. These corrections are transmitted to the rover. Comparing to […]

simpleRTK2B-SBC RTK GNSS board
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simpleRTK2B-SBC packs 3 u‑blox ZED-F9P RTK GNSS receivers for centimeter-level GPS positioning

Real-time Kinematic (RTK) relative positioning technique allows for 1-3cm positioning accuracy with data derived from satellite-based positioning systems such as GPS, BeiDou, GLONASS, Galileo, and NavIC. We’ve previously covered Skytraq PX1122R RTK GNSS module as well as SBG Systems Ellipse-D industrial-grade inertial navigation system featuring the technology, and now Spain-based ArduSimple has announced the simpleRTK2B-SBC single board computer that aims to “simplify the development of centimeter-level positioning solutions supporting real-time kinematics (RTK)” via up to three u‑blox ZED-F9P RTK GNSS receivers. simpleRTK2B-SBC board features & specifications: MCU – STMicro STM32F7 Cortex-M7 microcontroller GNSS Positioning 184-channel u-blox ZED-F9P engine Configuration options 2x ZED-F9P for position + heading 3x ZED-F9P for position + full attitude (roll, pitch, yaw) Navigation rate up to 20Hz Position accuracy down to 1 centimeter GPS: L1 & L2;  GLONASS: L1OF & L2OF;  Galileo: E1 & E5b;  BeiDou: B2I & B2I; QZSS and SBAS Up to 4 integrated […]

Rockchip RK3568, RK3588 and Intel x86 SBCs and SoMs in 2025
SBG Systems Inertial navigation sensor
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Miniature Inertial Navigation System Integrates 9-axis IMU Sensor and RTK GNSS with 1cm Accuracy

SBG Systems Ellipse-D is an industrial-grade inertial navigation system (INS) equipped with a 9-axis IMU sensor, a dual-antenna RTK GNSS module with one-centimeter accuracy, and a 64-bit microprocessor for processing the data. The inertial navigation system also includes a temperature sensor and a pressure sensor, supports odometer input, and is available in either Box or OEM versions. SBG Systems Ellipse-D inertial navigation sensor specifications: SoC – Unknown 64-bit microprocessor for data processing GNSS – Dual antenna GNSS with support for GPS, GLONASS, GALILEO, BEIDOU; Supported features: SBAS, RTK, RAW Sensors – 3-axis gyroscope, 3-axis accelerometer, 3-axis magnetometer, temperature sensors, pressure sensor Host Interface RS-232, RS-422, USB  up to 921,600 bps CAN 2.0A/B up to 1 Mbit/s Protocols – Binary eCom, NMEA, ASCII, TSS Input Voltage – 5 – 36 V Power Consumption – < 1,000 mW Dimensions & Weight Box: 46 x 45 x 32 mm | 65 grams OEM: […]

Skytraq PX1122R Multi-Band RTK GNSS Module
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Skytraq PX1122R Tiny Multi-Band RTK GNSS Module Offers Centimeter Accuracy

Several years ago Skytraq introduced NavSpark mini, a tiny (17x17mm) GPS module, that sold for $6. I got one and wrote a post explaining how to get started with the GPS module using GNSS viewer program. The company contacted me again today, as they’ve now launched an even smaller module Skytraq PX1122R measuring just 16x12mm, supporting GPS, Galileo, GLONASS, and Beidou signals, as well as Real-time Kinematic (RTK) relative positioning technique that allows for 1-3cm positioning accuracy. Skytraq PX1122R RTK GNSS module key features & specifications: Chipset – SkyTraq PX100 Phoenix GNSS chipset Supported GNSS standards & bands – GPS L1/L2C, Galileo E1/E5b, Beidou  B1I/B2I, GLONASS L1/L2, QZSS L1/L2C Integrated RTK with 1cm + 1ppm RTK accuracy in seconds (under 10 seconds) Up to 10Hz quad-GNSS RTK update rate Base or rover mode configurable Serial Interface – 3V LVTTL level 24x castellated holes with UART, RF input, 1PPS, Reset, 3.3V, […]

Boardcon LGA3576 Rockchip RK3576 System-on-Module designed for AI and IoT applications