ltecat4

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LTE Cat.4 Click

LTE Cat.4 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.

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Click Library

• Author : Stefan Filipovic
• Date : Jun 2024.
• Type : UART type

Software Support

Example Description

Application example shows device capability of connecting to the network and sending SMS or TCP/UDP messages, answering incoming calls, or retrieving data from GNSS using standard "AT" commands.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.LTECat4

Example Key Functions

• ltecat4_cfg_setup Config Object Initialization function.

void ltecat4_cfg_setup ( ltecat4_cfg_t *cfg );

• ltecat4_init Initialization function.

err_t ltecat4_init ( ltecat4_t *ctx, ltecat4_cfg_t *cfg );

• ltecat4_set_sim_apn This function sets APN for sim card.

void ltecat4_set_sim_apn ( ltecat4_t *ctx, uint8_t *sim_apn );

• ltecat4_send_sms_text This function sends text message to a phone number.

void ltecat4_send_sms_text ( ltecat4_t *ctx, uint8_t *phone_number, uint8_t *sms_text );

• ltecat4_send_cmd This function sends a specified command to the Click module.

void ltecat4_send_cmd ( ltecat4_t *ctx, uint8_t *cmd );

Application Init

Initializes the driver and logger.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    ltecat4_cfg_t ltecat4_cfg;  /**< Click config object. */

    /** 
     * 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.
    ltecat4_cfg_setup( &ltecat4_cfg );
    LTECAT4_MAP_MIKROBUS( ltecat4_cfg, MIKROBUS_1 );
    if ( UART_ERROR == ltecat4_init( &ltecat4, &ltecat4_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );

    app_state = LTECAT4_POWER_UP;
    log_printf( &logger, ">>> APP STATE - POWER UP <<<\r\n\n" );
}

Application Task

Application task is split in few stages:

• LTECAT4_POWER_UP:

  Powers up the device, performs a factory reset and reads system information.

• LTECAT4_CONFIG_CONNECTION:

  Sets configuration to device to be able to connect to the network (used only for SMS, CALL, or TCP/UDP demo examples).

• LTECAT4_CHECK_CONNECTION:

  Waits for the network registration indicated via CREG command and then checks the signal quality report (used only for SMS, CALL, or TCP/UDP demo examples).

• LTECAT4_CONFIG_EXAMPLE:

  Configures device for the selected example.

• LTECAT4_EXAMPLE:

  Depending on the selected demo example, it sends an SMS message (in PDU or TXT mode) or TCP/UDP message, waits for incoming calls and answers it, or waits for the GPS fix to retrieve location info from GNSS.

By default, the TCP/UDP example is selected.

void application_task ( void )
{
    switch ( app_state )
    {
        case LTECAT4_POWER_UP:
        {
            if ( LTECAT4_OK == ltecat4_power_up( &ltecat4 ) )
            {
                app_state = LTECAT4_CONFIG_CONNECTION;
                log_printf( &logger, ">>> APP STATE - CONFIG CONNECTION <<<\r\n\n" );
            }
            break;
        }
        case LTECAT4_CONFIG_CONNECTION:
        {
            if ( LTECAT4_OK == ltecat4_config_connection( &ltecat4 ) )
            {
                app_state = LTECAT4_CHECK_CONNECTION;
                log_printf( &logger, ">>> APP STATE - CHECK CONNECTION <<<\r\n\n" );
            }
            break;
        }
        case LTECAT4_CHECK_CONNECTION:
        {
            if ( LTECAT4_OK == ltecat4_check_connection( &ltecat4 ) )
            {
                app_state = LTECAT4_CONFIG_EXAMPLE;
                log_printf( &logger, ">>> APP STATE - CONFIG EXAMPLE <<<\r\n\n" );
            }
            break;
        }
        case LTECAT4_CONFIG_EXAMPLE:
        {
            if ( LTECAT4_OK == ltecat4_config_example( &ltecat4 ) )
            {
                app_state = LTECAT4_EXAMPLE;
                log_printf( &logger, ">>> APP STATE - EXAMPLE <<<\r\n\n" );
            }
            break;
        }
        case LTECAT4_EXAMPLE:
        {
            ltecat4_example( &ltecat4 );
            break;
        }
        default:
        {
            log_error( &logger, " APP STATE." );
            break;
        }
    }
}

Note

In order for the examples to work (except GNSS example), user needs to set the APN and SMSC (SMS PDU mode only) of entered SIM card as well as the phone number (SMS mode only) to which he wants to send an SMS. Enter valid values for the following macros: SIM_APN, SIM_SMSC and PHONE_NUMBER.

Example:

• SIM_APN "internet"
• SIM_SMSC "+381610401"
• PHONE_NUMBER "+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.

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