{"product_id":"sparkfun-rtk-express-plus","title":"SparkFun RTK Express Plus","description":"\u003cp\u003eThe SparkFun RTK Express Plus is an easy to use GNSS receiver for centimeter-level positioning. Perfect for surveying, autonomous vehicles, logging, and all types of post processing, this preprogrammed device can also be used for autonomous driving, navigation, asset tracking and any other application where there is a clear view of the sky. The RTK Express \u003cstrong\u003ePlus\u003c\/strong\u003e adds an internal IMU to combine real-time GNSS tracking with advanced sensor fusion. The result is accurate positioning even when GNSS is lost in tunnels, parking garages, etc. Out of the box an RTK Express Plus can be used with a correction source to create an RTK system capable of 14mm horizontal positional accuracy. The built-in Bluetooth�® connection via an ESP32 WROOM enables the user to use the RTK Express Plus with their choice of GIS application on a phone or tablet. The built in battery allows for over five hours of field use and is compatible with common USB battery banks.\u003c\/p\u003e \u003cp\u003eWe took all the lessons from the \u003ca href=\"https:\/\/www.sparkfun.com\/products\/18443\"\u003eRTK Surveyor\u003c\/a\u003e and built the RTK Express Plus. The RTK Express Plus is built upon the ZED-F9R u-blox receiver which uses the same F9 engine as all our RTK products but couples it with a built-in IMU. The embedded display allows for immediate feedback of horizontal positional accuracy, satellites in view, logging status, sensor fusion status, battery level, Bluetooth�® MAC, etc. The rocker switches found on the original have been replaced by keypad buttons. We increased the battery to 1300mAh for a longer run time. The internal switches have been replaced by a digital mux allowing for some really exciting applications including event triangulation. More ESD protection was added to protect the RF path, and we even threw in an accelerometer for digital leveling in the field. Please note u-blox's sensor fusion algorithms are designed specifically for vehicles and will not aid in the accuracy of normal surveying.\u003c\/p\u003e \u003cp\u003eThis device can be used in two modes:\u003c\/p\u003e \u003cul\u003e \u003cli\u003eGNSS Positioning with IMU Aid (~30cm accuracy)\u003c\/li\u003e \u003cli\u003eGNSS Positioning with RTK and IMU Aid (1.4cm accuracy)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eIn \u003cstrong\u003ePosition\u003c\/strong\u003e mode the device receives L1\/L2 signals from a user-provided antenna and the high-grade GNSS receiver provides lat\/long and altitude with accuracies around 300mm. If enabled in automotive applications, the internal IMU augments the position information when GNSS reception is degraded.\u003c\/p\u003e \u003cp\u003eIn \u003cstrong\u003ePositioning with RTK\u003c\/strong\u003e mode the device receives L1\/L2 signals from the antenna and correction data from a base station. The correction data can be obtained from a cellular link to online correction sources or over a radio link to a RTK Surveyor\/Express setup as a base station. If enabled in automotive applications, the internal IMU augments the position information when GNSS reception is degraded.\u003c\/p\u003e \u003cp\u003eNo \u003cstrong\u003eBase Mode\u003c\/strong\u003e. The RTK Express Plus adds an internal IMU (ZED-F9R) to combine real-time GNSS tracking with advanced sensor fusion. The result is accurate automotive positioning even when GNSS is lost in tunnels, parking garages, etc. The downside is the RTK Express Plus does not support a base station or generating RTCM corrections. If you are implementing your own RTK base station, consider using products based on the ZED-F9P (\u003ca href=\"https:\/\/www.sparkfun.com\/products\/18443\"\u003eRTK Surveyor\u003c\/a\u003e, \u003ca href=\"https:\/\/www.sparkfun.com\/products\/18442\"\u003eRTK Express\u003c\/a\u003e, or \u003ca href=\"https:\/\/www.sparkfun.com\/products\/19029\"\u003eRTK Facet\u003c\/a\u003e). The IMU algorithms only apply to automotive applications and will not increase or decrease regular 'clear view of the sky' positioning performance.\u003c\/p\u003e \u003cp\u003eTwo cables are provided with the RTK Express Plus allowing a user to plug in our easy to use \u003ca href=\"https:\/\/www.sparkfun.com\/products\/17255\"\u003eSerial Telemetry Radios\u003c\/a\u003e or their own radio link. If a local correction source is within 10km, a user can also use their phone to provide correction data over the Bluetooth�® link (no external radio needed!).\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e The SparkFun RTK Express Plus is just the enclosed device and does NOT include an antenna, serial telemetry radio, or associated mounting pieces. These items will need to be purchased separately from the Hookup Accessories below.\u003c\/p\u003e \u003cp\u003e\u003c\/p\u003e\u003cdiv class=\"center-block text-center\"\u003e \u003ca href=\"https:\/\/learn.sparkfun.com\/tutorials\/1857\" class=\"btn btn-default\"\u003eGet Started With the SparkFun RTK Express Guide\u003c\/a\u003e \u003c\/div\u003e \u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eGNSS Receiver: ZED-F9R\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eConcurrent reception of GPS, GLONASS, Galileo and BeiDou\u003c\/li\u003e \u003cli\u003eReceives both L1C\/A and L2C bands\u003c\/li\u003e \u003cli\u003eBuilt-in IMU (triple axis accel, triple axis gyro)\u003c\/li\u003e \u003cli\u003eCurrent: 68mA - 130mA (varies with constellations and tracking state)\u003c\/li\u003e \u003cli\u003eTime to First Fix: 25s (cold), 2s (hot)\u003c\/li\u003e \u003cli\u003eMax Navigation Rate: \u003cul\u003e \u003cli\u003ePVT (basic location over UBX binary protocol) - 25Hz\u003c\/li\u003e \u003cli\u003eRTK - 20Hz\u003c\/li\u003e \u003cli\u003eRaw - 25Hz\u003c\/li\u003e \u003c\/ul\u003e\n\u003c\/li\u003e \u003cli\u003eHorizontal Position Accuracy: \u003cul\u003e \u003cli\u003e2.5m without RTK\u003c\/li\u003e \u003cli\u003e0.010m with RTK\u003c\/li\u003e \u003c\/ul\u003e\n\u003c\/li\u003e \u003cli\u003eMax Altitude: 50km (31 miles)\u003c\/li\u003e \u003cli\u003eMax Velocity: 500m\/s (1118mph)\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eBluetooth�® Transceiver: ESP32 WROOM\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eXtensa�® dual-core 32-bit LX6 microprocessor\u003c\/li\u003e \u003cli\u003eUp to 240MHz clock frequency\u003c\/li\u003e \u003cli\u003e16MB of flash storage\u003c\/li\u003e \u003cli\u003e520kB internal SRAM\u003c\/li\u003e \u003cli\u003eIntegrated 802.11 BGN WiFi transceiver\u003c\/li\u003e \u003cli\u003eIntegrated dual-mode Bluetooth�® (classic and BLE)\u003c\/li\u003e \u003cli\u003eHardware accelerated encryption (AES, SHA2, ECC, RSA-4096)\u003c\/li\u003e \u003cli\u003e2.5 �µA deep sleep current\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eOverall Device\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003eInternal Battery: LiPo 1300mAh with 500mA charging\u003c\/li\u003e \u003cli\u003eRadio Port: 3.3V TTL Serial (57600bps RTCM TX\/RX)\u003c\/li\u003e \u003cli\u003eData Port: 3.3V TTL Serial (460800bps NMEA)\u003c\/li\u003e \u003cli\u003eEmbedded OLED Display for available satellites, data logging, and more.\u003c\/li\u003e \u003cli\u003ePush button controls\u003c\/li\u003e \u003cli\u003eWeight: 162g (entire device including battery)\u003c\/li\u003e \u003cli\u003eDimensions: 132mm x 101mm x 32mm (5.2in x 3.9in x 1.2in)\u003c\/li\u003e \u003cli\u003e1x \u003ca href=\"https:\/\/www.sparkfun.com\/qwiic\"\u003eQwiic\u003c\/a\u003e Connector\u003c\/li\u003e \u003cli\u003e1x microSD Socket for optional logging\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eDocuments:\u003c\/strong\u003e\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\u003ca href=\"https:\/\/cdn.sparkfun.com\/assets\/a\/8\/9\/f\/a\/SparkFun_RTK_Express_Plus.pdf\"\u003eSchematic\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/cdn.sparkfun.com\/assets\/d\/2\/d\/9\/9\/SparkFun_RTK_Express_Plus.zip\"\u003eEagle Files\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/learn.sparkfun.com\/tutorials\/1857\"\u003eHookup Guide\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/github.com\/sparkfun\/SparkFun_RTK_Firmware\"\u003eFirmware Repo\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/github.com\/sparkfun\/SparkFun_RTK_Express_Plus\"\u003eHardware Repo\u003c\/a\u003e\u003c\/li\u003e \u003cli\u003e\u003ca href=\"https:\/\/www.sparkfun.com\/rtk_surveyors\"\u003eLearn More About RTK Surveyors\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e","brand":"sparkfun-10","offers":[{"title":"Default Title","offer_id":40054682157141,"sku":"18590:GPS-18590:spark","price":84035.0,"currency_code":"INR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1034\/1611\/products\/18590-SparkFun_RTK_Express_Plus-04_82a3daac-a666-4457-a626-655a3fe00634.jpg?v=1651341688","url":"https:\/\/www.tanotis.com\/products\/sparkfun-rtk-express-plus","provider":"Tanotis","version":"1.0","type":"link"}