LTE IoT 2 Click

LTE IoT 2 Click is a Click board™ that allows connection to the LTE networks, featuring Quectel BG96 LTE module, which offers two LTE technologies aimed at Machine to Machine communication (M2M) and Internet of Things (IoT).

Click Product page

Click library

• Author : MikroE Team
• Date : Apr 2020.
• Type : UART GPS/GNSS type

Software Support

We provide a library for the LteIot2 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 LteIot2 Click driver.

Standard key functions :

• Config Object Initialization function.

  void lteiot2_cfg_setup ( lteiot2_cfg_t *cfg );

• Initialization function.

  LTEIOT2_RETVAL lteiot2_init ( lteiot2_t ctx, lteiot2_cfg_t cfg );

• Power ON/OFF the module.

  void lteiot2_module_power ( lteiot2_t *ctx, uint8_t state );

Example key functions :

• Send command function with parameter.

  void lteiot2_send_cmd_with_parameter ( lteiot2_t ctx, char at_cmd_buf, char *param_buf );

• LTE IoT 2 send SMS in PDU mode.

  err_t lteiot2_send_sms_pdu ( lteiot2_t ctx, char service_center_number, char phone_number, char sms_text );

• Generic parser function.

  lteiot2_error_t lteiot2_generic_parser ( char rsp, uint8_t command, uint8_t element, char parser_buf );

Examples Description

This example reads and processes data from LTE IoT 2 Click.

The demo application is composed of two sections :

Application Init

Initializes the driver and powers up the module, then sets default configuration for connecting the device to network.

void application_init ( void )
{
    log_cfg_t log_cfg;
    lteiot2_cfg_t cfg;

    /** 
     * 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.

    lteiot2_cfg_setup( &cfg );
    LTEIOT2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    lteiot2_init( &lteiot2, &cfg );

    lteiot2_module_power( &lteiot2, LTEIOT2_MODULE_POWER_ON );

    // dummy read
    lteiot2_process( );
    lteiot2_clear_app_buf( );
    // AT
    lteiot2_send_cmd( &lteiot2, LTEIOT2_CMD_AT );
    app_error_flag = lteiot2_rsp_check( );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 500 );

    // ATI - product information
    lteiot2_send_cmd( &lteiot2, LTEIOT2_CMD_ATI );
    app_error_flag = lteiot2_rsp_check(  );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 500 );

    // CGMR - firmware version
    lteiot2_send_cmd( &lteiot2, LTEIOT2_CMD_CGMR );
    app_error_flag = lteiot2_rsp_check(  );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 500 );

    // COPS - deregister from network
    lteiot2_send_cmd_with_parameter( &lteiot2, LTEIOT2_CMD_COPS, "2" );
    app_error_flag = lteiot2_rsp_check(  );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 500 );

    // CGDCONT - set sim apn
    lteiot2_set_sim_apn( &lteiot2, SIM_APN );
    app_error_flag = lteiot2_rsp_check(  );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 500 );

    // CFUN - full funtionality
    lteiot2_send_cmd_with_parameter( &lteiot2, LTEIOT2_CMD_CFUN, "1" );
    app_error_flag = lteiot2_rsp_check(  );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 500 );

    // COPS - automatic mode
    lteiot2_send_cmd_with_parameter( &lteiot2, LTEIOT2_CMD_COPS, "0" );
    app_error_flag = lteiot2_rsp_check(  );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    // CREG - network registration status
    lteiot2_send_cmd_with_parameter( &lteiot2, LTEIOT2_CMD_CREG, "2" );
    app_error_flag = lteiot2_rsp_check(  );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 500 );

    // CIMI - request IMSI
    lteiot2_send_cmd( &lteiot2, LTEIOT2_CMD_CIMI );
    app_error_flag = lteiot2_rsp_check(  );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 500 );

    // QGPSCFG - Set <nmeasrc> to 1 to enable acquisition of NMEA sentences via AT+QGPSGNMEA
    lteiot2_send_cmd_with_parameter( &lteiot2, LTEIOT2_CMD_QGPSCFG, "\"nmeasrc\",1" );
    app_error_flag = lteiot2_rsp_check(  );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 500 );

    // QGPS - Set to 1 to turn ON GNSS
    lteiot2_send_cmd_with_parameter( &lteiot2, LTEIOT2_CMD_QGPS, "1" );
    app_error_flag = lteiot2_rsp_check(  );
    lteiot2_error_check( app_error_flag );
    Delay_ms ( 500 );

    app_buf_len = 0;
    app_buf_cnt = 0;
    app_connection_status = WAIT_FOR_CONNECTION;
    log_info( &logger, " Application Task " );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

Application Task

Waits for the device to connect to network, then waits for the GPS position fix. Once it get a fix, it sends an SMS with GPS info to the selected phone number approximately every 40 seconds.

void application_task ( void )
{
    if ( app_connection_status == WAIT_FOR_CONNECTION )
    {
        // CGATT - request IMSI
        lteiot2_send_cmd_check( &lteiot2, LTEIOT2_CMD_CGATT );
        app_error_flag = lteiot2_rsp_check(  );
        lteiot2_error_check( app_error_flag );
        Delay_ms ( 500 );

        // CREG - network registration status
        lteiot2_send_cmd_check( &lteiot2, LTEIOT2_CMD_CREG );
        app_error_flag = lteiot2_rsp_check(  );
        lteiot2_error_check( app_error_flag );
        Delay_ms ( 500 );

        // CSQ - signal quality
        lteiot2_send_cmd( &lteiot2, LTEIOT2_CMD_CSQ );
        app_error_flag = lteiot2_rsp_check(  );
        lteiot2_error_check( app_error_flag );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
    }
    else
    {
        log_info( &logger, "CONNECTED TO NETWORK" );

        // SMS message format - PDU mode
        lteiot2_send_cmd_with_parameter( &lteiot2, LTEIOT2_CMD_CMGF, "0" );
        app_error_flag = lteiot2_rsp_check(  );
        lteiot2_error_check( app_error_flag );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );

        for( ; ; )
        {   
            // Get GPS info
            gps_parser_flag = 1;
            lteiot2_send_cmd_with_parameter( &lteiot2, LTEIOT2_CMD_QGPSGNMEA, "\"GGA\"" );
            app_error_flag = lteiot2_rsp_check(  );
            lteiot2_error_check( app_error_flag );
            Delay_ms ( 1000 );
            Delay_ms ( 1000 );
            Delay_ms ( 1000 );

            if ( gps_parser_flag == 0 )
            {
                log_printf( &logger, "> Sending message to phone number...\r\n" );
                lteiot2_send_sms_pdu ( &lteiot2, SIM_SMSC, PHONE_NUMBER_TO_MESSAGE, gps_info_message );
                app_error_flag = lteiot2_rsp_check(  );
                lteiot2_error_check( app_error_flag );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
                Delay_ms ( 1000 );
            }
        }
    }
} 

Note

In order for the example to work, user needs to set the phone number to which he wants to send an SMS, and also will need to set an APN and SMSC (required for PDU mode only) of entered SIM card. Enter valid data for the following macros: SIM_APN, SIM_SMSC and PHONE_NUMBER_TO_MESSAGE.

E.g.

• SIM_APN "vipmobile"
• SIM_SMSC "+381610401"
• PHONE_NUMBER_TO_MESSAGE "+381659999999"

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.LteIot2

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.