lteiot2

---

LTE IoT 2 Click

LTE IoT 2 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

---

Click Library

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

Software Support

Example Description

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

Example Libraries

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

Example Key Functions

• lteiot2_cfg_setup Config Object Initialization function.

void lteiot2_cfg_setup ( lteiot2_cfg_t *cfg );

• lteiot2_init Initialization function.

err_t lteiot2_init ( lteiot2_t *ctx, lteiot2_cfg_t *cfg );

• lteiot2_module_power Power ON/OFF the module.

void lteiot2_module_power ( lteiot2_t *ctx, uint8_t state );

• lteiot2_send_cmd_with_parameter Send command function with parameter.

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

• lteiot2_send_sms_pdu 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 );

• lteiot2_generic_parser Generic parser function.

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

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"

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

---