Mikroelektronika d.o.o.
SKU: MIKROE-5430GNSS RTK 2 Click Board
GNSS RTK 2 Click Board
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Key Features
- High precision, high performance, multi-band GNSS RX, centimeter-level accuracy, professional-grade, integrated IMU for RTK, selectable interface, support for RTCM soccections, geofence/RTK/time pulse indication, and more
- Based on the ZED-F9R - sensor fusion module with 3D sensors and a multi-band GNSS receiver from u-blox
- Can be used for high-precision positioning for demanding industrial applications
- mikroBUS: I2C, SPI, UART, GPIO and USB Interfaces
The GNSS RTK 2 Click Board™ is a compact add-on board used to enhance the precision of position data derived from satellite-based positioning systems. This board features the ZED-F9R, a multi-band professional-grade GNSS module with integrated multi-band Real Time Kinematics (RTK) technology offering centimetre-level accuracy from u-blox. This module concurrently uses GNSS signals from all four GNSS constellations (GPS/QZSS, GLONASS, Galileo, and BeiDou). It provides a reliable multi-band RTK turnkey solution with up to 30Hz real-time position update rate and full GNSS carrier raw data. This Click board™ is suitable for high-precision positioning for demanding industrial applications like machine control, ground robotic vehicles, and unmanned aerial vehicles (UAV).
The GNSS RTK 2 Click Board™ is supported by a mikroSDK-compliant library, which includes functions that simplify software development. This Click board™ comes as a thoroughly tested product, ready to be used on a system equipped with the mikroBUS™ socket.
How Does The GNSS RTK 2 Click Board™ Work?
The GNSS RTK 2 Click Board™ is based on the ZED-F9R, a multi-band professional-grade GNSS positioning module featuring the u-blox F9 receiver platform providing a reliable multi-band GNSS sensor fusion solution for industrial applications. Thanks to the multi-band RF front-end architecture, all four major GNSS constellations (GPS, GLONASS, Galileo, and BeiDou) plus SBAS and QZSS satellites can be received concurrently. The ZED-F9R high-performance sensor fusion module also has an integrated inertial measurement unit (IMU) for centimetre-level accuracy RTK positioning (RTK rover feature).
The ZED-F9R's built-in algorithms fuse the IMU data, GNSS measurements, wheel ticks, correction data, and a vehicle dynamics model to provide optimal positioning accuracy where GNSS alone would fail. The module operates in the open sky, in the wooded countryside, in demanding multipath environments, and even in challenging environments such as cities. Designed for industrial applications, ZED-F9R is the ultimate solution for a data-driven economy where control and position availability are crucial.
This module represents a turnkey self-contained solution, eliminating the technical risk and effort of selecting and integrating RF components and third-party libraries such as precise positioning engines. It also offers support for a range of correction services, RTCM or SPARTN-formatted corrections, enabling high precision navigation using internet or satellite data) through an unpopulated UART header in the middle of the board. This interface allows each application to optimize performance according to the application's unique needs.
The GNSS RTK 2 Click Board™ communicates with the MCU using the UART interface at 115200bps as its default communication protocol with the option for the users to use other interfaces, such as SPI and I2C, if they want to configure the module and write the library by themselves. The interface is selected by positioning SMD jumpers labelled COMM SEL in an appropriate position. When choosing the SPI communication, with the correct selection of the COMM SEL jumpers, it is also necessary to populate the DSEL jumper to configure the interface pins as SPI. In the default state, the jumper labelled as DSEL is unpopulated. The receiver also can enter a Safe-Boot mode. When the jumper labelled SFBT is populated, the receiver starts in Safe-Boot mode, and the GNSS operation is disabled.
The USB interface, compatible with USB version 2.0 (Full Speed, 12 Mbit/s), can be used for communication as an alternative to the UART. The USB port can be used as an additional power supply if you need the Click board™ to be a standalone device. In the case of the main supply failure, the module can use a backup supply voltage from a connected battery. Backup voltage supplies the real-time clock and battery-backed RAM and enables all relevant data to be saved in the backup RAM to allow a hot or warm start later.
In addition to these features, this board also uses several mikroBUS™ socket pins. RDY pin routed to the AN pin of the mikroBUS™ socket is used as a communication indicator when bytes are ready to be transmitted. The RST pin routed on the PWM pin of the mikroBUS™ socket provides the general reset ability, and the TMP pin, alongside its LED indicator, routed on the INT pin of the mikroBUS™ socket provides one pulse per second time pulse with configurable duration and frequency.
RTK pin routed on the RST pin of the mikroBUS™ socket, alongside an LED indicator labelled RTK, indicates the RTK positioning status. When LED blinks, a valid stream of RTCM messages is received, but no RTK fixed mode has been achieved. When the LED is constantly lit, the LED indicates that RTK mode has been achieved. It also has another LED indicator labelled as GDC that shows the current geofence status as to whether the receiver is inside any active areas. For example, this feature can be used to wake up a sleeping host when a defined geofence condition is reached.
The GNSS RTK 2 Click Board™ possesses the SMA antenna connector for connecting the appropriate antenna that MikroE offers, such as GPS Active External Antenna. This antenna is an excellent choice for all GSM/GPRS applications supporting L1 and L2 band frequencies. This Click board™ can be operated only with a 5V logic voltage level. The board must perform appropriate logic voltage level conversion before using MCUs with different logic levels. However, the Click board™ comes equipped with a library containing functions and an example code that can be used as a reference for further development.
SPECIFICATIONS
| Type | GPS/GNSS |
| Applications | It can be used for high-precision positioning for demanding industrial applications |
| On-board modules | ZED-F9R - sensor fusion module with 3D sensors and a multi-band GNSS receiver from u-blox |
| Key Features | High precision, high performance, multi-band GNSS RX, centimetre-level accuracy, professional-grade, integrated IMU for RTK, selectable interface, support for RTCM cosections, geofence/RTK/time pulse indication, and more |
| Interface | GPIO,I2C, SPI,UART, USB |
| Compatibility | mikroBUS |
| Click board size | L (57.15 x 25.4 mm) |
| Input Voltage | 5V |
PINOUT DIAGRAM
This table shows how the pinout othge GNSS RTK 2 Click Board™ corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).
| Notes | Pin |  |
Pin | Notes | |||
|---|---|---|---|---|---|---|---|
| Transmission Ready Indicators | RDY | 1 | AN | PWM | 16 | RST | Reset |
| RTK Positioning Status | RTK | 2 | RST | INT | 15 | TMP | Time Pulse |
| SPI Chip Select | CS | 3 | CS | RX | 14 | TX | UART TX |
| SPI Clock | SCK | 4 | SCK | TX | 13 | RX | UART RX |
| SPI Data OUT | SDO | 5 | MISO | SCL | 12 | SCL | I2C Clock |
| SPI Data IN | SDI | 6 | MOSI | SDA | 11 | SDA | I2C Data |
| NC | 7 | 3.3V | 5V | 10 | 5V | Power Supply | |
| Ground | GND | 8 | GND | GND | 9 | GND | Ground |
ONBOARD SETTINGS AND INDICATORS
| Label | Name | Default | Description |
|---|---|---|---|
| LD1 | PWR | - | Power LED Indicator |
| LD2 | TMP | - | Time Pulse LED Indicator |
| LD3 | RTK | - | RTK Status LED Indicator |
| LD4 | CFG | - | Geofence Status LED Indicator |
| JP1-JP4 | COMM SEL | Right | Communication Interface Selection SPI/UART: Left position SPI, Right position UART |
| J1 | - | Unpopulated | Correction UART Interface Header |
| J2 | - | Unpopulated | Direction/Wheel Ticks Header |
| J3 | - | Unpopulated | 3V3 Output Voltage Header |
| DSEL | DSEL | Unpopulated | SPI Interface Activation |
| SFBT | SFBT | Unpopulated | Safe-Boot Mode Activation |
GNSS RTK 2 CLICK ELECTRICAL SPECIFICATIONS
| Description | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Supply Voltage | - | 5 | - | V |
| Operating Frequency | 1.2 | - | 1.6 | GHz |
| Sensitivity | - | -160 | - | dBm |
| Altitude | - | - | 80 | km |
Software Support
We provide a library for the GNSS RTK 2 Click Board™ as well as a demo application (example), developed using MikroE compilers. The demo can run on all the main MikroE development boards.
The package can be downloaded/installed directly from NECTO Studio The package Manager(recommended), downloaded from our LibStock™ or found on the MikroE Github account.
Library Description
This library contains API for the GNSS RTK 2 Click Board™ driver.
Key functions
-
gnssrtk2_reset_deviceThis function resets the device by toggling the RST pin. -
gnssrtk2_generic_readThis function reads a desired number of data bytes from the module. -
gnssrtk2_parse_gnggaThis function parses the GNGGA data from the read response buffer.
Example Description
This example demonstrates the use of GNSS RTK 2 Click Board™ by reading and displaying the GNSS coordinates.
void application_task ( void )
{
gnssrtk2_process( &gnssrtk2 );
if ( app_buf_len > ( sizeof ( GNSSRTK2_RSP_GNGGA ) + GNSSRTK2_GNGGA_ELEMENT_SIZE ) )
{
gnssrtk2_parser_application( app_buf );
}
}
The full application code, and ready to use projects can be installed directly from NECTO Studio. The package Manager(recommended), downloaded from our LibStock™ or found on MikroE Github account.
Other MikroE Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.GNSSRTK2
Additional Notes and Information
Depending on the development board you are using, you may need USB UART Click Board™, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroE compilers.
MIKROSDK
The GNSS RTK 2 Click Board™ is supported with mikroSDK - MikroE Software Development Kit. To ensure proper operation of mikroSDK compliant Click board™ demo applications, mikroSDK should be downloaded from the LibStock and installed for the compiler you are using.
GNSS RTK 2 Click Board
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