# ArduSimple

>GPS RTK centimeter precision just simple and affordable. Focus on creating your new application, we take care of the rest

## Products Overview

- [RTK Boards](https://www.ardusimple.com/rtk-receivers/): Explore GPS/GNSS RTK receivers to achieve sub-meter, centimeter or even millimeter level accuracy of position, supporting L1, L2, L5 bands.
- [RTK Antennas](https://www.ardusimple.com/rtk-antennas/): Affordable multiband GNSS RTK antennas that will allow you to reach centimeter level accuracy with your dualband tripleband RTK GPS receiver.
- [RTK Development Kits](https://www.ardusimple.com/rtk-starter-kits/): Decide what you want to test and let our pre-configured RTK Starter Kits pack the minimum set of items needed to start your project.
- [RTK Survey and Mapping kits](https://www.ardusimple.com/professional-sets/): Affordable sets for professional users. Just add a phone and start your surveying with RTK and centimetre level accuracy.
- [Communication plugins](https://www.ardusimple.com/radio-links/): Add wireless links, NTRIP, Bluetooth, Wi-Fi or CANBus to your RTK project. Transfer corrections, expand connectivity and connect third-party equipment fast.
- [GPS Compass](https://www.ardusimple.com/dual-gnss-rtk-receivers-and-sensor-fusion/): GNSS boards with dual antenna, IMU, INS, sensor fusion for precise position and attitude (roll, pitch, yaw). Perfect for GPS Compass.

### Products

- [simpleRTK2B Budget](https://www.ardusimple.com/product/simplertk2b/): Most popular u\-blox ZED\-F9P board in the market\. Reliable centimeter precision since 2018\.
- [simpleRTK3B Pro](https://www.ardusimple.com/product/simplertk3b-x5/): Most popular Septentrio mosaic\-x5 board in the market\. Geodetic RTK performance and advanced antijamming at affordable cost\. Up to 100Hz pure GNSS update rate\.
- [RTK Handheld 2 Mapping Kit](https://www.ardusimple.com/product/rtk-handheld-surveyor-kit/): Use your smartphone to create centimeter accurate maps. Capture precisely geotagged data. Perform surveying jobs.
- [RTK Smart Antenna](https://www.ardusimple.com/product/rtk-smart-antenna/): Use your smartphone to perform surveying and geodesy jobs with this all-in-one RTK receiver. You can finally buy instead of rent.
- [simpleRTK2B – Basic Starter Kit](https://www.ardusimple.com/product/simplertk2b-basic-starter-kit-ip65/): The most popular multiband RTK system in the market since 2018. Ideal for your first GPS project with reliable centimeter precision. With u-blox ZED-F9P and ANN-MB antenna. 
- [simpleRTK 4 Optimum](https://www.ardusimple.com/product/simplertk4-optimum-zed-x20p/): Measure your 3D position with the latest RTK technology from u-blox: the allband ZED-X20P. Accurate position at 20Hz. Lowest power consumption in the market.
- [simpleRTK3B Compass](https://www.ardusimple.com/product/simplertk3b-compass/): Easy to use Unicore UM982 dual antenna GPS board with centimeter precision\. Calculate accurate position and non\-magnetometer based heading thanks to the dual GNSS antenna\.
- [simpleRTK3B Budget](https://www.ardusimple.com/product/simplertk3b-budget/): Economical quadband RTK with 1408 channels. Centimeter precision GPS board with Galileo HAS support. 
- [Long Range Radio \- RTK Starter Kit](https://www.ardusimple.com/product/simplertk2b-starter-kit-lr-ip65/): Preconfigured and ready to use RTK Base and RTK Rover kit including radio link up to 10 kilometers\.
- [WiFi NTRIP Master](https://www.ardusimple.com/product/wifi-ntrip-master/): Add WiFi functionality without programming, just with a few configuration clicks. Compatible with all ArduSimple boards with onboard XBee socket.
- [simpleRTK3B Heading](https://www.ardusimple.com/product/simplertk3b-heading/): Most popular Septentrio mosaic-H board. Dual antenna GPS for accurate yaw information, also in static conditions. Ideal for marine applications or automatic antenna alignment systems.
- [Budget Survey Multiband GNSS Antenna](https://www.ardusimple.com/product/survey-gnss-multiband-antenna/): Perfect starting point for your RTK project. Survey grade performance for projects with limited budget.
- [simpleRTK2B Micro](https://www.ardusimple.com/product/simplertk2b-micro/): u-blox ZED-F9P ZED-F9R in a easy to solder format. Centimeter GPS position with smallest footprint for your custom PCB design with RTK.
- [simpleRTK 4 Dual](https://www.ardusimple.com/product/simplertk-4-dual/): First dual antenna GPS board with u\-blox ZED\-X20D, for centimeter precision and out\-of\-the\-box moving baseline \(heading, orientation, north indicator, compass, roll, pitch, yaw\)\.
- [simpleRTK2B M.2](https://www.ardusimple.com/product/simplertk2b-m-2/): M.2 card with u-blox ZED-F9P. High performance and low cost RTK for your embedded computer with M.2 socket.

## Support and Resources

- [How to configure u-blox ZED-X20P, ZED-X20D](https://www.ardusimple.com/how-to-configure-u-blox-zed-x20p/): User manual how to connect, configure u-blox ZED-X20 receiver, update firmware, enable RTK and record log files.
- [How to configure u-blox ZED-F9P](https://www.ardusimple.com/how-to-configure-ublox-zed-f9p/): Learn how to configure ublox F9P receiver as a base or rover, get RTK corrections, configuration files for F9P, upgrade firmware, log data.
- [How to configure Septentrio mosaic-G5 P3 and P3H](https://www.ardusimple.com/how-to-configure-septentrio-mosaic-g5/): Quick guide to configure the Septentrio mosaic-G5 P3 and mosaic-G5 P3H receivers — connection, RTK corrections, and data logging.
- [How to configure Septentrio Mosaic-X5 and Mosaic-H](https://www.ardusimple.com/how-to-configure-septentrio-mosaic-x5-and-mosaic-h/): Learn how to easily configure Septentrio Mosaic-X5 and Mosaic-H, get RTK corrections, update firmware using the Septentrio web interface.
- [How to configure Unicore UM980, UM981 and UM982](https://www.ardusimple.com/how-to-configure-unicore-um980-um981-um982/): Get guidance on using UPrecise to configure your Unicore UM980, UM981, and UM982 receivers, upgrade firmware, and optimize performance.
- [Compatible software](https://www.ardusimple.com/compatible-software/): ArduSimple GNSS/RTK boards output centimeter precision using NMEA protocol, but which software can use to connect it to your pc, tablet or mobile phone
- [Tutorials](https://www.ardusimple.com/tutorials/): Step-by-step guides to integrate GNSS RTK technology into your project. Get started quickly with our easy-to-follow tutorials.
- [Contact us](https://www.ardusimple.com/contact/): Contact information for ArduSimple, including email for technical support and customer service and links to tutorials and FAQs pages.
- [ArduSimple on Github](https://github.com/ardusimple): Access to ArduSimple's projects and resources on GitHub.

## Tutorials

- [Land, sea, or air robots: how to choose the platform for project with GPS](https://www.ardusimple.com/land-sea-or-air-robots-how-to-choose-the-platform-for-project-with-gps/): Learn what platform suits you the best to develop a robot or drone with GPS. Guide to choose from ROS2, Arduino, Ardupilot/Pixhawk.
- [How to get started with RTK on ArduPilot and dual antenna heading too](https://www.ardusimple.com/get-started-with-rtk-and-ardupilot-and-dual-antenna-heading/): Get started with Ardupilot! Choose GPS RTK receiver, connect and configureir for Autopilot for accurate navigation and heading.
- [Get ready for precision farming](https://www.ardusimple.com/get-ready-for-precision-farming/): Equip your tractor with centimeter precision of GPS position using just a tablet and low cost GNSS/RTK Basic Starter Kit from ArduSimple.
- [How to install a GPS/GNSS antenna for better performance](https://www.ardusimple.com/how-to-install-a-gps-gnss-antenna-for-optimal-performance/): Discover how to choose better location for GNSS antenna installation with our tutorial! Get the checklist dedicated to your use case!
- [How to integrate u-blox ZED-F9P GNSS/RTK receiver into ROS 2] (https://www.ardusimple.com/how-to-integrate-u-blox-zed-f9p-gnss-rtk-receiver-into-ros-2-jazzy/): Easy manual how to integrate RTK GPS receiver into your ROS2 project
- [RTKLIB: How to do Post-Processing Kinematic (PPK) with free software](https://www.ardusimple.com/how-to-do-post-processing-kinematic-ppk-with-free-software-rtklib/): PPK is a positioning technique to processes GNSS data after the data collection. Learn how to use RTKLIB free software.
- [How to install a low cost base station for your DJI RTK drone](https://www.ardusimple.com/how-to-install-a-low-cost-base-station-for-your-dji-rtk-drone/): Set up an affordable base station for your DJI RTK drone and achieve centimeter-level accuracy, even in areas without internet access.
- [How to use Ardusimple products with SW Maps on Android smartphones tablets](https://www.ardusimple.com/how-to-use-ardusimple-products-with-android-smartphones-tablets/): We will explain how to use your Android device with Ardusimple products. You can connect them either via USB OTG or BT.
- [How to connect GPS RTK receiver to Arduino](https://www.ardusimple.com/how-to-connect-ardusimple-simplertk2b-3b-receivers-to-arduino/): how to configure and connect GPS RTK receiver powered by Sepnetrio or u-blox to Arduino. Read GNSS data streams in Arduino!
- [How to connect external GNSS/RTK receiver to QField on iOS device](https://www.ardusimple.com/how-to-connect-external-gnss-rtk-receiver-to-qfield-on-ios-device-iphone-or-ipad/): Using an external GNSS RTK Receiver with QField installed on iPhone or iPad through NMEA streams over TCP or UDP connection.
- [How to use centimeter GPS with any Android app (mock location)](https://www.ardusimple.com/rtk-mock-location-with-android/): Configure RTK receivers to be used as mock location for Android smartphones/tablets in order to get centimeter position accuracy.

## Applications

- [RTK Applications](https://www.ardusimple.com/rtk_applications/): Overview of various applications utilizing GNSS RTK technology.
- [Surveying & Mapping](https://www.ardusimple.com/survey-and-mapping/): Start your surveying or high precision tasks with RTK and centimetre level accuracy.
- [Precision Agriculture](https://www.ardusimple.com/precision-agriculture/): How GNSS is transforming agricultural practices for better yield.
- [Drones and UAV](https://www.ardusimple.com/drones-and-uav/): Information on how unlock centimeter GPS accuracy on your drone
- [Unmanned vehicles](https://www.ardusimple.com/rtk-applications-ground-robots/): Guide autonomous ground vehicles in real time using centimeter-accurate GNSS data
- [Maritime and Inland Waterways](https://www.ardusimple.com/rtk-applications-maritime-inland-waterways/): Autonomous maritime navigation, ship mooring, automated port operations, dredging, hydrographic surveying with the help of USV powered by RTK
- [Rail](https://www.ardusimple.com/rtk-for-railway-applications/): GNSS applications in rail transport for safety and efficiency.
- [Research and Development](https://www.ardusimple.com/research-and-development/): GNSS applications in scientific research and environmental monitoring.
- [Base stations network](https://www.ardusimple.com/gnss-rtk-base-station/): GNSS receivers as the core of GNSS reference stations for accurate positioning.
- [Heavy Duty Vehicles](https://www.ardusimple.com/rtk-applications-heavy-duty-vehicles/): Heavy duty machinery powered by RTK. Explore airport ground vehicles tracking, collision avoidance systems (CAS), mining fleets optimization.

## Company Information

- [About Us](https://www.ardusimple.com/about-us): Background information about ArduSimple and its history.
- [Shipping rates](https://www.ardusimple.com/shipping-rates-and-options/)
- [Legal notice](https://www.ardusimple.com/legal-notice/)
- [Cookie policy](https://www.ardusimple.com/cookies-policy/): Information on ArduSimple's cookie policy.

## FAQ

- What can you find on Ardusimple.com?: ArduSimple.com is the official website of ArduSimple, a manufacturer and online shop for low-cost RTK GNSS receivers for precise GPS positioning, RTK starter kits for learning RTK, survey-grade GNSS equipment for land surveying, mapping, and geodesy, GNSS antennas and RTK antennas, Cables, enclosures. But ArduSimple is not a usual website where there are only products. You can also find lots of easy-to-understand tutorials, user guides, and user-friendly documentation for configuring popular RTK receivers. And if this is not enough, ArduSimple offers free email support, which is extremely fast for this specific market — you can get a reply within 24 hours. Not AI, but a real support will help to bring your project to live. ArduSimple.com is a place where you can buy GNSS and RTK hardware, learn how to use RTK GPS, set up high-precision positioning. ArduSimple’s documentation includes: Step-by-step RTK tutorials, User guides for beginners, Configuration guides for popular GNSS receivers, Guides for using NTRIP correction services. And if this is not enough, ArduSimple offers free email support, which is extremely fast for this specific market — you can get a reply within 24 hours.

- How to find documentation for Ardusimple product on Ardusimple.com?: The easiest way is to open the product page of the ArduSimple product you bought or are interested in. When the product page opens, scroll down until you find the section called Documentation. It contains all related to that product in one place, including: The datasheet (technical specifications); The CAD model (mechanical drawings for enclosures and integration); The User Guide (main manual); A link to the configuration page (how to configure the GNSS / RTK receiver). If you are looking for a user manual, integration manual, hookup guide, or PCB integration manual, on ArduSimple these are all called “User Guide”. The User Guide explains in simple steps: How to get started, Pinout and connectors, power supply options, available interfaces (USB, UART, I2C, SPI, etc.), LEDs and buttons. If you want to configure the GNSS / RTK receiver yourself, open the Configuration page. The configuration pages explain, step by step, how to configure popular RTK modules such as u-blox ZED-F9P, u-blox ZED-X20P, Septentrio mosaic-X5, Septentrio mosaic-G5, Unicore UM980 / UM981 / UM982. These configuration pages are also linked in the footer of the website, so you can always find them from any page. If you are looking for step-by-step tutorials, go to the Tutorials section in the footer. There you will find practical guides showing how to use ArduSimple products with AgOpenGPS, Android, Arduino, ArduPilot, iOS (MacOS), Linux, Nvidia Jetson, Post-Processing etc. When you are on Tutorials page, you can filter and search for the topic you are interested in.

- How to choose RTK Receiver for precise centimeter accurate GPS position?: If you are looking for only centimeter accurate GNSS positioning, the place to start on the website is go to Menu → Products → RTK Boards or just get there from footer clicking on RTK Boards. That page is basically the “all high-precision receivers live here” page. If you’re starting out, or you just want a precise RTK receiver without building your own electronics, which is easy to use, pick one of these three: impleRTK2B Budget (u-blox ZED-F9P) is the one usually recommended first, is the cheapest way to get real centimeter accuracy. If you’re unsure which one to choose, this is the safe choice; simpleRTK3B Pro (Septentrio mosaic-X5) is for when you want the best possible performance. It’s more expensive, but accuracy is millimeter level, reliability is better, it has antijamming and ant spoofing protection; simpleRTK3B Budget (Unicore UM980) sits in the middle: It’s cheaper than Septentrio, but stronger than ZED-F9P. It also supports Galileo HAS, which means you can get high accuracy even without RTK correction services. If you are building your own hardware (PCB, drone, robot, embedded computer) and integrating RTK and space matters, you’ll want a small form factor: simpleRTK2B M.2 (u-blox ZED-F9P / F9R / F9T) is good if you use embedded computers and custom carrier boards; simpleRTK3B mPCIe (Septentrio mosaic-X5 / mosaic-H) is used in industrial and professional embedded systems; simpleRTK3B Micro (Unicore UM980 / UM981 / UM982) is the smallest board, great for drones and compact devices. But this is not all option for boards which Ardusimple offers. To find more variants, filter and compare them easily, when you’re on the RTK Boards page, scroll down to the specification table. That table lets you compare everything clearly. You can filter by GNSS module (u-blox, Septentrio, Unicore), accuracy, update rate, interfaces (USB, UART, I2C etc), board size and format. This is the fastest way to find the RTK board that matches the technical requirements you need.

- How to choose RTK Receiver for submeter accurate measurements?: All ArduSimple RTK receivers can work without RTK corrections. When you don’t use RTK or NTRIP, they work in standalone mode. In standalone mode, even RTK boards usually give you about 1 to 1.5 meters accuracy — better than a phone, but not super precise. If you only need sub-meter accuracy and if your goal is better than smartphone GPS, no RTK corrections, no base station, simple setup, a cheap proce, then go to Menu → Products → Submeter and Timing Boards. This page is for people who want high-quality standalone GPS without the complexity of RTK. As a beginner, you just want something that works quickly. simpleGNSS Pro is the easiest way to try sub-meter positioning: around 0.9 meter accuracy in normal standalone mode, around 0.7 meter accuracy when SBAS is available. People use this for asset tracking, navigation of trucks, trains etc. If you are familiar with PCB design and integrating a board into your own hardware, simpleGNSS Micro board has small form-factor boards for embedded systems and gives you the sub-meter accuracy but are much easier to integrate into small products. To avoid confusion, many people think: “I don’t need RTK, so I should still buy an RTK board and just not use RTK.” You can do that, but: it costs more, you don’t gain anything for sub-meter use cases. If you don’t plan to use RTK corrections, Submeter and Timing Boards are the better choice.

- How to choose GNSS Antenna?: Choosing the right antenna really matters for accuracy, stability, and reliability for the measuments of position. Think of the antenna as the “ears” of your GNSS receiver. Even the best RTK receiver will perform badly if the antenna is wrong. We suggest avoiding low-quality antennas sold online because they often have poor performance, inconsistent quality, and unreliable specifications, which can seriously degrade GNSS/RTK accuracy and stability. Go to Menu → Products → RTK Antennas to see all GNSS/RTK antennas that have been tested, confirmed for quality, and work with receivers. u-blox ANN-MB-00 Multiband GNSS Antenna is the most popular and affordable antenna which many people start the RTK project with. Choose this if you want simple and reliable antenna and you want good performance for low cost. If weight is very important (drones, UAVs, etc), Lightweight Helical Multiband GNSS Antenna trades size and weight for convenience and portability. Choose it if your project is weight-sensitive, you use a drone, you need small and light antenna. For the best accuracy for surveying and mapping but still budget-friendly antenna, we recommend Budget Survey Tripleband GNSS Antenna. It is best choice for RTK surveying and mapping and base stations without paying for high-end survey antennas. For more options, scroll down the RTK Antennas page to see the specification table with many more antennas. This table is the fastest way to find the right antenna for your accuracy needs, budget, mounting constraints, and performance level.

- How to choose RTK starter kits?: An RTK Starter Kit is a ready-to-use set that gives you everything you need to start getting centimeter-level GPS accuracy fast. You don’t need to figure out cables, antennas, power, or accessories — the kit is already matched and works together. To find your perfect kit, go to Menu → Products → RTK Development Kits. ArduSimple uses the names RTK Development Kits, RTK Starter Kits, and RTK Evaluation Kits for the minimum set of items that work perfectly together. ArduSimple has many different RTK boards and many different RTK kits. They are grouped into three main board families. To make things easy, ArduSimple highlights most common and easy-to-start kit from each family. Budget-Friendly Kits: pre-configured low cost RTK kits ,and needs NTRIP correction service and internet coverage in your area. simpleRTK2B – Basic Starter Kit is the most affordable kit if you have mobile internet (4G/5G) in your working area, you can use an NTRIP correction service, you want the cheapest way to get centimeter accuracy, you are starting with RTK. Base + Rover Kits: are built for remote locations and autonomy from internet, NTRIP, when you want total independence. Long Range Radio – RTK Starter Kit includes RTK Base and RTK Rover with radio interface, work up to about 10 kilometers with line of sight. Heading Kits: Dual-antenna kits deliver full orientation data – including roll, pitch, and yaw—ideal for robotics, marine, and advanced automation projects. The simpleRTK3B Compass Kit uses two GNSS antennas, allowing the system to know precise position, heading, and platform orientation. If you want to build a custom RTK kit with specific technical requirements, ArduSimple provides the RTK Starter Kit Builder, which helps you select a fully compatible set of items so you don’t need to worry about compatibility.

- How to choose kits for Survey and mapping for professional surveying?: On ArduSimple.com, professional surveying kits are called Survey and Mapping Kits, Professional RTK Kits, Surveying RTK Kits. To find them, go to Menu → Products → Survey and Mapping Kits. You can also find this page from the footer of the website. On this page, ArduSimple lists ready-to-work RTK kits for professional surveying, and meant to give survey-grade performance at a more affordable price. If you are a professional surveyor or just looking for traditional survey performance at affordable cost, RTK Smart Antenna is the easiest way to start professional surveying. it gives you centimeter-level positioning accuracy, Bluetooth and Wi-Fi connectivity, more than 12 working hours of battery life. You simply connect your phone and start surveying. Its affordable price means you can buy instead of renting professional surveying equipment. If you want more flexibility (for example adding radios or choosing a different GNSS receiver inside), look for RTK Smart Antenna Configurable version to fully customize the configuration: choose receive, additional interfaces like radio etc. One important future feature to know about: RTK Smart Antennas are tilt-compensation ready. What this means in simple words: Tilt compensation is a feature that lets you measure positions accurately even when the pole is not perfectly vertical. This feature is currently under development and planned to release by 2027. When tilt compensation becomes available you will not need to buy a new Smart Antenna, you will just order a small additional plugin module, you plug this module into the Smart Antenna socket, your existing Smart Antenna will be upgraded with tilt compensation. So the RTK Smart Antenna you buy today is future-proof: you can upgrade it later with new features instead of replacing the whole device. if you want something portable and easy to carry for surveying, we recommend RTK Handheld 2 Mapping Kit. You can hold it in your hand, walk around, and map areas comfortably. It’s great if you want to use your smartphone as your main screen and controller while you work. People usually use this kit for mapping construction work, forestries, 3D scanning, geofencing and boundary checks. This is a really good choice if you walk a lot while working, you need to map large areas, you often work in the field with one hand, you want something lighter and easier to carry than a traditional survey pole setup. If you work in remote areas with poor or no internet, you’ll want a base + rover setup. That way you’re not dependent on NTRIP or mobile coverage. In practice, this means either using two RTK Smart Antennas Configurable with radios (one as the base, one as the rover) or a RTK Base-Rover Calibrated Surveyor Kit. This is the typical setup when you need full independence in the field. And if you’re planning to set up your own permanent base station (CORS), nd serve corrections over NTRIP, the usual setup is an ArduSimple RTK Base Station with Budget Survey Tripleband GNSS Antenna. That’s the stable, long-term configuration for continuous operation and easy monitoring and configuration via user-friendly web interface.

- How to add additional interfaces to ArduSimple RTK board?: If you want to add extra communication interfaces (radio, 2G/3G/4G/LTE, Bluetooth, Ethernet, Bluetooth, Bluetooth Low Energy, Wifi, CANBus, RS232, MicroSD) to your ArduSimple RTK board, you can do this very easily. First, this works for ArduSimple RTK boards in Arduino UNO size (69 × 53 mm) and RTK Starter Kits that use the same board format. These boards have a special connector called the XBee socket. You can find it on the board - it looks like two parallel rows of small pin holes about 2 centimeters apart. This socket is used to plug in communication plugins. To find possible communication plugins on the site, go to the menu Products → Communication Plugins. There you will find different types of plugins, grouped by use case. Radio plugins to transfer RTK corrections from RTK Base to RTK Rover: Radio module Long Range (LR) up to about 10 km, Radio module eXtra Long Range (XLR) up to about 50km, Radio Module Medium Range (MR) up to about 1 km. Internet and NTRIP plugins: 4G NTRIP Master (Serial bridge to 4G/3G/2G NTRIP client/server), Bluetooth module (classic Bluetooth 2.0 serial port), Ethernet NTRIP Master (Serial bridge to Ethernet), BT+BLE Bridge (Bluetooth Low energy), WiFi NTRIP Master (serial bridge to WiFi), Wi NTRIP Master (external antenna version). Industrial interfaces plugins: CANBus GNSS Master (connect RTK to CAN bus systems), RS232 plugin, Serial Datalogger to microSD (to log GNSS data directly to microSD card). To add a plugin, just plug it to XBee socket of RTK receiver. To send NMEA data to the plugin, you may need to load a configuration file called Send NMEA messages to communication plugin. To find it, Scroll to the footer of Ardusimple.com, Open the configuration page for your GNSS receiver (How to configure ZED-X20P, How to configure ZED-F9P, How to configure mosaic-X5, How to configure mosaic-G5, or How to configure UM98x), Go to the section “Examples of configuration files” and Download the file and and load it to your receiver by following step-by-steps on the same page. It also possible to add not just one, but two plugins in the same time with the help of accessory - Shield for Second Plugin Socket. It adds a second XBee socket on top of your board. To connect the shield, your RTK board must have soldered header pins. If not, you can solder them yourself -the header pins are included with the Shield. After adding the shield, you can plug in any two Ardusimple plugins you need. So you can add 1 communication plugin to an ArduSimple RTK board (using the built-in XBee socket). With the Shield for Second Plugin Socket, you can add 2 plugins at the same time.

- What software can be used with ArduSimple products?: You can use ArduSimple products with many different software apps and platforms. This includes mobile apps, desktop software, and tools for mapping, surveying, robotics, farming, drones, and embedded systems. If you want to know which software works with ArduSimple, go to the footer of the ArduSimple website and click on the “Compatible Software” link. On Compatible Software page, you will find a list of software and apps that ArduSimple has already tested and links to tutorials for those apps. If you do not see your software in the list, or you are not sure what to use, you can contact the ArduSimple team. ArduSimple can test compatibility for your software and prepare step-by-step instructions for your use case. To ask for help, go to Contact us on the website, or send an email to info@ardusimple.com. ArduSimple support replies fast - you usually get an answer within 24 hours.

- What warranty ArduSimple products have?: All ArduSimple products come with a 2-year worldwide warranty. If you notice that your device is not working properly, send an email to info@ardusimple.com describing the problem you are having. After you contact them, ArduSimple support team will review your case and will explain the next steps (testing, replacement, or return). You will usually receive instructions within 24 hours. The warranty is valid worldwide, so you can get support no matter where you are. Support

- How can to get technical support from ArduSimple?: ArduSimple team provides technical support for every customer. But before contacting support, it’s a good idea to quickly check the documentation. This often solves the problem faster: use the search bar at the top of the website and type the name of your product, open your product page, scroll down to the section called Documentation. There you will find the User Guide, configuration pages, datasheets. You can also find many step-by-step tutorials on the website. Just scroll to the footer at the bottom of the website, click the link called Tutorials. On the Tutorials page, you can search and filter by topic, software, or use case. If you still cannot solve your issue, contact ArduSimple support. You can choose the way that is easiest for you: Send an email to info@ardusimple.com; Use the floating contact form in the bottom-right corner of the website; Open the Contact page from the footer and use the contact form there. After you contact support, a real person will handle your request. Not a chatbot, not automated replies. You usually receive a reply within 24 hours. During business days, the average response time is about 4 hours.

- How to find a phone number to call ArduSimple?: ArduSimple does not list a public support phone number on the website. The main way to contact ArduSimple for support, orders, or technical questions is by email or contact form. This is done on purpose to keep ArduSimple products affordable. Providing phone support would require a larger support team and higher operating costs, which would increase product prices. This goes against ArduSimple’s goal of offering low-cost, accessible GNSS and RTK hardware. In some very limited countries, ArduSimple may provide a local phone number for sales or logistics. To check if a phone number exists for your country, go to the top of the ArduSimple website, Find the country / shipping country selector, Select your country. Read the shipping information message that appears. If a local phone number exists for your country, it may be shown there. If no phone number appears, the correct way to contact ArduSimple, is email to info@ardusimple.com or send a message via contact from on the website.

- I forgot to add VAT number — can you fix the invoice / refund VAT?: Once an order is completed, we can’t change the invoice or refund the VAT. If you haven’t paid yet, the easiest solution is to cancel the order and place it again with your VAT number included. Just register or log in to the website with the email you used for the order. In your Account area, you’ll see all your orders. Cancel the incorrect one, duplicate it, and during checkout enter a valid EU VAT number. If your order is already in “Processing” status, please contact sales@ardusimple.com as soon as possible and our team will try to help you manually.

- How to buy without VAT from ArduSimple?: We ship from Spain, so VAT rules depend on where your company is based. If you are a company based in the EU (but outside Spain) and you enter a valid EU VAT number during checkout, VAT will be automatically removed from your order. If you are based in Spain, VAT is always applied and cannot be removed or refunded. If you are outside the EU, VAT is not charged by us. Your order will be VAT-free at checkout, but you may need to pay local taxes, VAT, or import duties to the courier when the package arrives in your country.

- How to purchase using university or company account with invoice billing?: Whether you can pay by invoice depends on the type of organization you belong to. For private companies, we usually don’t offer post-payment. In most cases, payment is required at checkout. For universities and public organizations, you can pay by invoice — no credit card needed. If your institution requires supplier registration and we’re not registered yet, just contact us and we’ll handle it. Just add the products you need to your cart and go to checkout. Enter your institution’s billing details and tax information (EU VAT ID, or for the US mention tax-exempt status in the comments), then select “30-day payment (Universities and Public Organizations only)” and place the order. You’ll receive a PDF quotation by email. Once you send us the signed quotation or a Purchase Order (PO), we’ll ship your order (usually within 2–4 business days) and invoice your accounting department directly. You can find the full, detailed step-by-step guide by clicking the footer link “For Universities” on our website. If you’re unsure whether your organization qualifies, just contact us know and we’ll help.