lriot  2.1.0.0
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LR IoT Click

LR IoT Click is a compact add-on board that contains a long-range LoRa transceiver. This board features Semtech Corporation’s LR1110, an ultra-low power platform integrating a LoRa® transceiver, multi-constellation GNSS, and passive WiFi AP MAC address scanner. Alongside its sub-GHz capabilities, the LR1110 also has a multi-band front-end capable of receiving 802.11b/g/n WiFi Access Point MAC addresses and GNSS (GPS, BeiDou, geostationary) satellite raw data befitting geo-positioning purposes. The acquired information is then transmitted using an LPWAN network to a geolocation server, which analyzes it and correlates the position with data from a geolocation database, enabling a unique balance between low power and performance.

Click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Sep 2022.
  • Type : SPI type

Software Support

We provide a library for the LR IoT 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 LR IoT Click driver.

Standard key functions :

Example key functions :

Example Description

This example demonstrates the use of LR IoT Click board by reading a GNSS and WiFi

scanning results and displaying it on the USB UART. In the case of a tranceive firmware the communication between two devices over LoRa will be demonstrated as well.

The demo application is composed of two sections :

Application Init

Initializes the driver, performs the Click default configuration, and after that reads

and displays the chip's firmware information. In the case you need to update or change the default firmware refer to the LRIOT_UPDATE_FIRMWARE and LRIOT_FIRMWARE_SELECTOR macro definition.

void application_init ( void )
{
log_cfg_t log_cfg;
lriot_cfg_t lriot_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
lriot_cfg_setup( &lriot_cfg );
LRIOT_MAP_MIKROBUS( lriot_cfg, MIKROBUS_1 );
if ( SPI_MASTER_ERROR == lriot_init( &lriot, &lriot_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( LRIOT_ERROR == lriot_default_cfg ( &lriot ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
lriot_chip_info_t chip_info;
if ( LRIOT_OK == lriot_get_chip_info ( &lriot, &chip_info ) )
{
lriot_display_chip_info ( chip_info );
}
log_info( &logger, " Application Task " );
}

Application Task

There are 3 types of the example:

  1. Modem firmware: reads a GNSS and WiFi scanning results and displays them on the USB UART.
  2. Transcever firmware (application mode transmitter ): reads a GNSS and WiFi scanning results as well as the chip internal temperature and sends specific LoRa messages containing that information to the LoRa receiver.
  3. Transcever firmware (application mode receiver): reads all incoming LoRa packets and displays them on the USB UART.
void application_task ( void )
{
#if ( LRIOT_FIRMWARE_SELECTOR == LRIOT_TRANSCEIVE_FIRMWARE )
uint8_t lora_buffer[ LRIOT_LORA_PKT_PAYLOAD_LEN ] = { 0 };
#ifdef DEMO_APP_TRANSMITTER
lriot_gnss_scan_results_t gnss_results = { 0 };
lriot_wifi_scan_results_t wifi_results = { 0 };
uint8_t tmp_buf[ 30 ] = { 0 };
float temperature = 0;
if ( LRIOT_OK == lriot_get_gnss_scan_results ( &lriot, &gnss_results ) )
{
lriot_display_gnss_scan_results ( gnss_results );
}
memset( lora_buffer, 0, sizeof ( lora_buffer ) );
strcpy( lora_buffer, "Number of sattelites found is " );
uint16_to_str ( gnss_results.num_satellites, tmp_buf );
l_trim ( tmp_buf );
strcat( lora_buffer, tmp_buf );
if ( LRIOT_OK == lriot_send_lora_message ( &lriot, lora_buffer ) )
{
log_printf( &logger, "Send LoRa message - done\r\n" );
}
if ( LRIOT_OK == lriot_get_wifi_scan_results ( &lriot, &wifi_results ) )
{
lriot_display_wifi_scan_results ( wifi_results );
}
memset( lora_buffer, 0, sizeof ( lora_buffer ) );
strcpy( lora_buffer, "Number of WiFi scan results is " );
uint16_to_str ( wifi_results.num_wifi_results, tmp_buf );
l_trim ( tmp_buf );
strcat( lora_buffer, tmp_buf );
if ( LRIOT_OK == lriot_send_lora_message ( &lriot, lora_buffer ) )
{
log_printf( &logger, "Send LoRa message - done\r\n" );
}
log_printf ( &logger, "**************************************************************\r\n" );
if ( LRIOT_OK == lriot_get_temperature ( &lriot, &temperature ) )
{
log_printf ( &logger, "Temperature : %.2f degC\r\n", temperature );
}
memset( lora_buffer, 0, sizeof ( lora_buffer ) );
strcpy( lora_buffer, "My temperature is " );
float_to_str ( temperature, tmp_buf );
l_trim ( tmp_buf );
tmp_buf[ 5 ] = 0;
strcat( lora_buffer, tmp_buf );
strcat( lora_buffer, " degC" );
if ( LRIOT_OK == lriot_send_lora_message ( &lriot, lora_buffer ) )
{
log_printf( &logger, "Send LoRa message - done\r\n" );
}
#else
if ( LRIOT_OK == lriot_read_lora_message ( &lriot, &pkt_status, lora_buffer ) )
{
log_printf ( &logger, "**************************************************************\r\n" );
log_printf ( &logger, "* RECEIVED LORA PACKET *\r\n" );
log_printf ( &logger, "**************************************************************\r\n" );
log_printf ( &logger, " RSSI : %d dBm\r\n", ( uint16_t ) pkt_status.rssi_pkt_in_dbm );
log_printf ( &logger, " Signal RSSI : %d dBm\r\n", ( uint16_t ) pkt_status.signal_rssi_pkt_in_dbm );
log_printf ( &logger, " SNR : %d dB\r\n", ( uint16_t ) pkt_status.snr_pkt_in_db );
log_printf ( &logger, " Message : \"%s\"\r\n\n", lora_buffer );
}
#endif
#else
lriot_gnss_scan_results_t gnss_results = { 0 };
lriot_wifi_scan_results_t wifi_results = { 0 };
if ( LRIOT_OK == lriot_get_gnss_scan_results ( &lriot, &gnss_results ) )
{
lriot_display_gnss_scan_results ( gnss_results );
}
if ( LRIOT_OK == lriot_get_wifi_scan_results ( &lriot, &wifi_results ) )
{
lriot_display_wifi_scan_results ( wifi_results );
}
#endif
}

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.LRIoT

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.


lriot_lora_packet_status_t::snr_pkt_in_db
int8_t snr_pkt_in_db
Definition: lriot.h:263
lriot_gnss_scan_results_t::num_satellites
uint8_t num_satellites
Definition: lriot.h:223
LRIOT_ERROR
@ LRIOT_ERROR
Definition: lriot.h:323
lriot_lora_packet_status_t::rssi_pkt_in_dbm
int8_t rssi_pkt_in_dbm
Definition: lriot.h:262
lriot_t
LR IoT Click context object.
Definition: lriot.h:273
lriot_gnss_scan_results_t
LR IoT GNSS Scan results object.
Definition: lriot.h:222
lriot_default_cfg
err_t lriot_default_cfg(lriot_t *ctx)
LR IoT default configuration function.
LRIOT_MAP_MIKROBUS
#define LRIOT_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: lriot.h:165
lriot_wifi_scan_results_t
LR IoT WiFi Scan results object.
Definition: lriot.h:205
application_task
void application_task(void)
Definition: main.c:115
LRIOT_OK
@ LRIOT_OK
Definition: lriot.h:322
lriot_lora_packet_status_t
LR IoT LoRa packet status object.
Definition: lriot.h:261
lriot_get_wifi_scan_results
err_t lriot_get_wifi_scan_results(lriot_t *ctx, lriot_wifi_scan_results_t *results)
LR IoT get wifi scan results function.
lriot_lora_packet_status_t::signal_rssi_pkt_in_dbm
int8_t signal_rssi_pkt_in_dbm
Definition: lriot.h:264
lriot_cfg_t
LR IoT Click configuration object.
Definition: lriot.h:297
lriot_send_lora_message
err_t lriot_send_lora_message(lriot_t *ctx, uint8_t *message)
LR IoT send lora message function.
lriot_get_temperature
err_t lriot_get_temperature(lriot_t *ctx, float *temperature)
LR IoT get temperature function.
lriot_init
err_t lriot_init(lriot_t *ctx, lriot_cfg_t *cfg)
LR IoT initialization function.
lriot_chip_info_t
LR IoT chip info object.
Definition: lriot.h:240
lriot_wifi_scan_results_t::num_wifi_results
uint8_t num_wifi_results
Definition: lriot.h:213
lriot_read_lora_message
err_t lriot_read_lora_message(lriot_t *ctx, lriot_lora_packet_status_t *pkt_status, uint8_t *message)
LR IoT read lora message function.
application_init
void application_init(void)
Definition: main.c:72
lriot_get_gnss_scan_results
err_t lriot_get_gnss_scan_results(lriot_t *ctx, lriot_gnss_scan_results_t *results)
LR IoT get gnss scan results function.
lriot_cfg_setup
void lriot_cfg_setup(lriot_cfg_t *cfg)
LR IoT configuration object setup function.
lriot_get_chip_info
err_t lriot_get_chip_info(lriot_t *ctx, lriot_chip_info_t *info)
LR IoT get chip info function.
LRIOT_LORA_PKT_PAYLOAD_LEN
#define LRIOT_LORA_PKT_PAYLOAD_LEN
LR IoT LoRa macros.
Definition: lriot.h:118