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REGISTER EDUCATION FORUM / G P S B O A R D S / SPARKFUN GPS-RTK BOARD - NEO-M8P-2 (QWIIC) SparkFun GPS-RTK Board - NEO-M8P-2 (Qwiic) GPS-15005 4 DESCRIPTION DOCUMENTS FEATURES Voltage: 5V or 3.3V but all logic is 3.3V Current: ~35mA (varies with constellations and tracking state) Time to First Fix: 29s (cold), 1s (hot) Max Navigation Rate: PVT (basic location over UBX binary protocol) - 10Hz RTK - 5Hz Moving Baseline RTK - 4Hz Raw - 10Hz Horizontal Position Accuracy: 2.5m without RTK 0.025m with RTK 2x Qwiic Connectors Weight: 6.3g Dimensions: 40.6mm x 33mm (1.6in x 1.3in) images are CC BY 2.0 SHARE Previous Versions Tags BREAKOUT GNSS GPS I2C NEO-M8P-2 QWIIC USB SparkFun GPS-RTK Board - NEO-M8P-2 (Qwiic) Product Help and Resources TUTORIALS VIDEOS SKILLS NEEDED GPS-RTK Hookup Guide SEPTEMBER 13, 2018 Getting Started with UCenter What is GPS RTK? SEPTEMBER 14, 2018 SEPTEMBER 13, 2018 Find out where you are! Use this easy hook-up guide to get up and running with the SparkFun high precision GPS-RTK board. Learn the tips and tricks to use the u-blox software tool to configure your GPS receiver. Learn about the latest generation of GPS and GNSS receivers to get 2.5cm positional accuracy! RTK SPI UART U-BLOX COMMENTS REVIEWS 7 4 Customer Reviews 4.8 out of 5 Based on 4 ratings: 5 star 3 4 star 1 3 star 0 2 star 0 1 star 0 Currently viewing all customer reviews. 2 of 2 found this helpful: reliable cm positioning about 3 months ago by Member #894355 verified purchaser I have used u-blox chips for years for surveying purposes. I collect hours of GPS data at a single, fixed position using a good, magnetic-base GPS antenna on a 100 mm ground plane. I then download the same time period of GPS data from a nearby NGS CORS station 6 km away to act as my fixed-position base. The open-source RTKLIB package usually combines these measurements to place my antenna within a 1 cm circle of error. Recently two, consecutive, 24-hour measurements from a fixed antenna on my roof fell within 2 mm of each other. Previously I had used evaluation kits from u-blox with their earlier chips. I had often run into frustrating software hang-ups with the u-blox u-center control software running on Windows 10 laptop over long integrations. I decided to switch to a real-time Arduino/Sparkfun system with the M8P. The combination of the u-blox software on Windows 10 with the Sparkfun GPS-RTK board has already proven to be a much more reliable system. I'm still building the Arduino control/logging system to eliminate the need for a laptop on site. Good product. Excellent RTK Testbed, Especially with the Qwiic Connectors about a month ago by Member #1249684 verified purchaser I got a pair of these boards and am using them in my lab, along with a couple Blackboards and LCDs. I set up my own RTCM3 base station, as I don't have one nearby to leverage. Nathan Seidle's Ublox library works great! I would like to see a couple of things added to the Library, or perhaps a discussion on how to do these two things: 1) How to add a command to the Library, for example, how to command the base station data rate from 1Hz to 5Hz. 2) How to pull other parameters from the M8P, for example, the current 3D accuracy parameter. Any hints on these is welcome! I'm slogging through the 409-page Protocol Spec, but not seeing how to make the mods to the Library. Great product! Don Most accurate and precise board so far last month by Member #16991 verified purchaser No other board delivers this accuracy and precision, looking firward to a potential ZED-F9P successor! Working nicely about 2 weeks ago by Member #1460730 verified purchaser I got this board hooked up to a lcd and BlackBoard using Qwiic and ublox / ucenter software on my Mac - via parallels running Windows 10. However I am puzzeled. People talk about using pairs. A base and a rover. Ok. But - I use a single receiver to define the absolute position of a dronereference plate A on the ground. Then take the system to the next calibration point B, take its position, go to point C and so on. Later, when starting to proces the data, I use the plates positions info. Is it correct to assume that the positioning is within 2.5 cm for each? START SOMETHING. Email address SUBSCRIBE TO NEWSLETTER About Us About SparkFun Press & Media SparkFun Education Feeds Jobs Contact Help Customer Service Shipping Return Policy FAQ Chat With Us Programs Become a Community Partner Community Stories Custom Kit Requests Tell Us About Your Project Sell Your Widget on SparkFun Become a SparkFun Distributor Large Volume Sales Community Forum SparkFun IRC Channel Take the SparkFun Quiz SparkFun Kickstarter Projects Distributors In 2003, CU student Nate Seidle fried a power supply in his dorm room and, in lieu of a way to order easy replacements, decided to start his own company. 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