Nano LR Click

NOTE: The EMB-LR1276S module is certified for worldwide region.

How does it work?

Nano LR Click as its foundation uses the EMB-LR1276S, a sub-1GHz wireless module that supports the LoRaWAN long-range wireless protocol based on the SAMR34 SiP from Embit. It offers a long-range spread spectrum communication with high interference immunity. Nano LR Click is ideal for use in various applications, such as IoT, home and building automation, wireless alarm and security systems, automated meter reading, industrial monitoring and control, and more.

The EMB-LR1276S can be configured as an embedded micro system or a simple data modem for low power applications in the 868MHz and 915MHz radio bands. It is equipped with up to 256 KB of Flash and up to 40 KB of SRAM and it supports long-range and FSK modulation.

Nano LR Click communicates with MCU using the UART interface with commonly used UART RX and TX pins with the hardware flow control pins UART CTS, RTS, RI (Clear to Send, Ready to Send, and Ring Indicator). Besides these pins, Nano LR Click has also GP1 and STAT pins, which are routed to the PWM and AN pins of the mikroBUS™ socket, respectively. STAT pin is also wired to a separate LED indicator labeled as STAT to enable quick and easy module status indication.

Nano LR Click features the U.FL antenna connector with an impedance of 50Ω, so it can be equipped with the appropriate antenna that Mikroe has in its offer.

The Click board™ is designed to work with 3.3V only. When using it with MCUs that use 5V levels for their communication, a proper level translation circuit should be used.

Specifications

Pinout diagram

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

Notes	Pin					Pin	Notes
Status	ST	1	AN	PWM	16	GP1	General Purpose I/0 pin
Reset	RST	2	RST	INT	15	RTS	UART Ready-To-Send
UART Clear-To-Send	CTS	3	CS	RX	14	TX	UART TX
	NC	4	SCK	TX	13	RX	UART RX
	NC	5	MISO	SCL	12	NC
	NC	6	MOSI	SDA	11	NC
Power Supply	3.3V	7	3.3V	5V	10	NC
Ground	GND	8	GND	GND	9	GND	Ground

Onboard settings and indicators

Nano LR Click electrical specifications

Software Support

We provide a library for the Nano LR 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Nano LR Click driver.

Key functions:

• void nanolr_cfg_setup ( nanolr_cfg_t *cfg ); – Config Object Initialization function.
• NANOLR_RETVAL nanolr_init ( nanolr_t *ctx, nanolr_cfg_t *cfg ); – Initialization function.
• void nanolr_default_cfg ( nanolr_t *ctx ); – Click Default Configuration function.

Examples description

This example reads and processes data from Nano LR clicks.

The demo application is composed of two sections :

void application_task ( void )
{    
#ifdef DEMO_APP_RECEIVER
    nanolr_process( );
#endif

#ifdef DEMO_APP_TRANSMITTER
    nanolr_send_data( &nanolr, TEXT_TO_SEND, strlen( TEXT_TO_SEND ) );
    log_printf( &logger, "The message "%s" has been sent!rn", ( uint8_t * ) TEXT_TO_SEND );
    log_printf( &logger, "------------------------------------------------------------rn" );
    Delay_ms( 2000 );
#endif
}

The full application code, and ready for use projects can be installed directly from compiler’s IDE (recommended) or found on LibStock page or mikroE GitHub account.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.NanoLR

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. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.

mikroSDK

This Click board™ is supported with mikroSDK – MikroElektronika 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.