GNSS 17 Click

GNSS 17 Click is a compact add-on board for precise and reliable global navigation and positioning. This board features the M20071, an integrated full-function GNSS receiver module from Antenova, which features the MediaTek AG3335MN flash chip. This module can concurrently track multiple GNSS constellations, including GPS, GLONASS, GALILEO, BEIDOU, and QZSS, ensuring accurate positioning even in dense urban environments. It includes advanced features like multi-path algorithms for enhanced accuracy, a high-performance onboard LNA for weak-signal environments, and power-saving modes to optimize energy consumption.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Apr 2024.
• Type : UART type

Software Support

We provide a library for the GNSS 17 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for GNSS 17 Click driver.

Standard key functions :

• gnss17_cfg_setup Config Object Initialization function.

  void gnss17_cfg_setup ( gnss17_cfg_t *cfg );

• gnss17_init Initialization function.

  err_t gnss17_init ( gnss17_t *ctx, gnss17_cfg_t *cfg );

Example key functions :

• gnss17_generic_read This function reads a desired number of data bytes by using UART serial interface.

  err_t gnss17_generic_read ( gnss17_t *ctx, uint8_t *data_out, uint16_t len );

• gnss17_parse_gga This function parses the GGA data from the read response buffer.

  err_t gnss17_parse_gga ( uint8_t *rsp_buf, uint8_t gga_element, uint8_t *element_data );

• gnss17_reset_device This function resets the device by toggling the EN and AON pins.

  void gnss17_reset_device ( gnss17_t *ctx );

Example Description

This example demonstrates the use of GNSS 17 Click by reading and displaying the GNSS coordinates.

The demo application is composed of two sections :

Application Init

Initializes the driver and resets the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    gnss17_cfg_t gnss17_cfg;  /**< Click config object. */

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );

    // Click initialization.
    gnss17_cfg_setup( &gnss17_cfg );
    GNSS17_MAP_MIKROBUS( gnss17_cfg, MIKROBUS_1 );
    if ( UART_ERROR == gnss17_init( &gnss17, &gnss17_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

Application Task

Reads the received data, parses the NMEA GGA info from it, and once it receives the position fix it will start displaying the coordinates on the USB UART.

void application_task ( void )
{
    if ( GNSS17_OK == gnss17_process( &gnss17 ) ) 
    {
        if ( app_buf_len > ( sizeof ( GNSS17_RSP_GGA ) + GNSS17_GGA_ELEMENT_SIZE ) ) 
        {
            gnss17_parser_application( app_buf );
        }
    }
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.GNSS17

Additional notes and informations

Depending on the development board you are using, you may need USB UART Click, 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 MikroElektronika compilers.