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 :
lriot_cfg_setup
Config Object Initialization function.
lriot_init
Initialization function.
lriot_default_cfg
Click Default Configuration function.
Example key functions :
lriot_get_wifi_scan_results
This function performs a WiFi scanning and reads the results.
lriot_get_gnss_scan_results
This function performs a GNSS scanning and reads the results.
lriot_send_lora_message
This function sends a LoRa message to the receiver.
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.
{
log_cfg_t log_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
if ( SPI_MASTER_ERROR ==
lriot_init( &lriot, &lriot_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
{
lriot_display_chip_info ( chip_info );
}
log_info( &logger, " Application Task " );
}
Application Task
There are 3 types of the example:
- Modem firmware: reads a GNSS and WiFi scanning results and displays them on the USB UART.
- 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.
- Transcever firmware (application mode receiver): reads all incoming LoRa packets and displays them on the USB UART.
{
#if ( LRIOT_FIRMWARE_SELECTOR == LRIOT_TRANSCEIVE_FIRMWARE )
#ifdef DEMO_APP_TRANSMITTER
uint8_t tmp_buf[ 30 ] = { 0 };
float temperature = 0;
{
lriot_display_gnss_scan_results ( gnss_results );
}
memset( lora_buffer, 0, sizeof ( lora_buffer ) );
strcpy( lora_buffer, "Number of sattelites found is " );
l_trim ( tmp_buf );
strcat( lora_buffer, tmp_buf );
{
log_printf( &logger, "Send LoRa message - done\r\n" );
}
{
lriot_display_wifi_scan_results ( wifi_results );
}
memset( lora_buffer, 0, sizeof ( lora_buffer ) );
strcpy( lora_buffer, "Number of WiFi scan results is " );
l_trim ( tmp_buf );
strcat( lora_buffer, tmp_buf );
{
log_printf( &logger, "Send LoRa message - done\r\n" );
}
log_printf ( &logger, "**************************************************************\r\n" );
{
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" );
{
log_printf( &logger, "Send LoRa message - done\r\n" );
}
#else
{
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,
" 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_display_gnss_scan_results ( gnss_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.