Mosaic Click

NOTE: Please be advised that the Mosaic Click, featuring the advanced Mosaic-X5 GNSS receiver from Septentrio, is not available for sale in specified countries. To see the complete list of countries where the Mosaic Click is unavailable for sale, please refer to the Mosaic Click: Restricted Countries List. If you have any questions or require further information, please do not hesitate to contact our customer service team.

How does it work?

Mosaic Click is based on the Mosaic-X5, a compact GNSS receiver from Septentrio. This receiver offers centimeter-level accuracy across multiple bands and satellite constellations such as GPS, GLONASS, Beidou, Galileo, and NavIC. It integrates AIM+ technology for advanced interference mitigation and anti-spoofing, providing unmatched reliability and precision. This technology can neutralize diverse signal interferences, ranging from simple, continuous narrowband signals to complex wideband and pulsed jammers. Designed for mass-market applications like robotics and autonomous technologies, this solution not only ensures low power consumption but also offers a wide range of interface options and delivers RTK positioning.

Communication between the Mosaic-X5 and the host MCU is made through a UART interface, using the standard UART RX and TX pins and hardware flow control pins (CTS/RTS). The module communicates at 115200bps by default, allowing efficient data exchange. This Click board™ also incorporates a reset pin (RST) for direct module resetting and a ready indicator (RDY) that signals the module's operational status through logical high (active) or low (standby or reset) states.

Furthermore, the module supports USB connectivity in device mode, adhering to the USB 2.0 standard for high-speed data transfers (up to 480Mbps). It includes options for USB power achieved by an LDO (the MCP1826) or an alternative power switch (the TPS22965), each ensuring the required 3.3V for normal module operation. In addition to the USB interface, it is also equipped with a microSD card slot for external data logging, which can be controlled via a LOG button. 

This button enables the toggling of SD card logging and manages the card's mounting status, which can be monitored through a green LED indicator marked LOG. If the LOG button is pressed for 100ms to 5 seconds, it toggles SD Card logging ON and OFF. Holding this button for more than 5 seconds and then releasing it unmounts the SD card if it is mounted, and vice versa. The green LOG LED indicator can check the SD card mount status.

In addition to the LOG LED, the board also features a general-purpose user-configurable red LED, a yellow PPS (Pulse Per Second) LED, and four test points. TP1 and TP2 are two event timers that can be used to time tag external events with a time resolution of 20ns, while TR3 and TP4 present the same functions as ON/OFF and Reset features. It is also possible to power off the module with the ON/OFF button and to toggle it between active and standby mode. However, this abrupt power interruption could cause data losses when logging on an external SD card.

The board features u.Fl connector for GNSS antenna, like the GNSS Active Antenna or GNSS L1/L5 Active Antenna that MIKROE offers, in combination with an IPEX-SMA cable for flexible and efficient connectivity options. In addition, the user can easily choose the power supply of the external antenna by choosing between 3.3V and 5V on the VANT SEL jumper.

This Click board™ can operate with both 3.3V and 5V logic voltage levels selected via the VCC SEL jumper. Given that the Mosaic-X5 module operates at 3.3V, a logic-level translator, TXB0106, is also used for proper operation and an accurate signal-level translation. This way, both 3.3V and 5V capable MCUs can use the communication lines properly. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used as a reference for further development.

Specifications

Pinout diagram

This table shows how the pinout on Mosaic Click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes	Pin					Pin	Notes
	NC	1	AN	PWM	16	RDY	Module Ready Indicator
Module Reset / ID SEL	RST	2	RST	INT	15	RTS	UART RTS
UART CTS / ID COMM	CTS	3	CS	RX	14	TX	UART TX
	NC	4	SCK	TX	13	TX	UART RX
	NC	5	MISO	SCL	12	NC
	NC	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	5V	Power Supply
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Mosaic Click electrical specifications

Software Support

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

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

Library Description

This library contains API for Mosaic Click driver.

Key functions

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

• mosaic_enable_nmea_output This function enables the NMEA output with the selected message parameters and an output interval.

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

Example Description

This example demonstrates the use of Mosaic click by reading and displaying the GNSS coordinates.

void application_task ( void ) 
 { 
     mosaic_process( &mosaic ); 
     if ( app_buf_len > ( sizeof ( MOSAIC_NMEA_GGA ) + MOSAIC_GGA_ELEMENT_SIZE ) )  
     { 
         mosaic_parser_application( app_buf ); 
     } 
 }

The full application code, and ready to use projects can be installed directly from NECTO Studio 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.Mosaic

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 MIKROE compilers.

mikroSDK

This 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.

For more information about mikroSDK, visit the official page.