lteiot11

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LTE IoT 11 Click

LTE IoT 11 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 : Mar 2023.
• Type : UART type

Software Support

Example Description

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

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.LTEIoT11

Example Key Functions

• lteiot11_cfg_setup Config Object Initialization function.

void lteiot11_cfg_setup ( lteiot11_cfg_t *cfg );

• lteiot11_init Initialization function.

err_t lteiot11_init ( lteiot11_t *ctx, lteiot11_cfg_t *cfg );

• lteiot11_set_sim_apn This function sets APN for sim card.

void lteiot11_set_sim_apn ( lteiot11_t *ctx, char *sim_apn );

• lteiot11_send_sms_text This function sends text message to a phone number.

void lteiot11_send_sms_text ( lteiot11_t *ctx, char *phone_number, char *sms_text );

• lteiot11_parse_gga This function parses the GGA data from the read response buffer.

err_t lteiot11_parse_gga ( char *rsp_buf, uint8_t gga_element, char *element_data );

Application Init

Initializes the driver, tests the communication by sending "AT" command, and after that restarts the device.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    lteiot11_cfg_t lteiot11_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.
    lteiot11_cfg_setup( &lteiot11_cfg );
    LTEIOT11_MAP_MIKROBUS( lteiot11_cfg, MIKROBUS_1 );
    if ( UART_ERROR == lteiot11_init( &lteiot11, &lteiot11_cfg ) )
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );
        for ( ; ; );
    }
    
    lteiot11_process( );
    lteiot11_clear_app_buf( );

    // Check communication
    lteiot11_send_cmd( &lteiot11, LTEIOT11_CMD_AT );
    error_flag = lteiot11_rsp_check( LTEIOT11_RSP_OK );
    lteiot11_error_check( error_flag );
    
    // Restart device
    #define RESTART_DEVICE "1,1"
    lteiot11_send_cmd_with_parameter( &lteiot11, LTEIOT11_CMD_CFUN, RESTART_DEVICE );
    error_flag = lteiot11_rsp_check( LTEIOT11_RSP_SYSSTART );
    lteiot11_error_check( error_flag );

    log_info( &logger, " Application Task " );
    example_state = LTEIOT11_CONFIGURE_FOR_NETWORK;
}

Application Task

Application task is split in few stages:

• LTEIOT11_CONFIGURE_FOR_NETWORK:

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

• LTEIOT11_WAIT_FOR_CONNECTION:

  Waits for the network registration indicated via CREG URC event and then checks the connection status (used only for SMS or TCP/UDP demo examples).

• LTEIOT11_CONFIGURE_FOR_EXAMPLE:

  Sets the device configuration for sending SMS or TCP/UDP messages or for retrieving data from GNSS depending on the selected demo example.

• LTEIOT11_EXAMPLE:

  Depending on the selected demo example, it sends an SMS message (in PDU or TXT mode) or TCP/UDP message 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 ( example_state )
    {
        case LTEIOT11_CONFIGURE_FOR_NETWORK:
        {
            if ( LTEIOT11_OK == lteiot11_configure_for_network( ) )
            {
                example_state = LTEIOT11_WAIT_FOR_CONNECTION;
            }
            break;
        }
        case LTEIOT11_WAIT_FOR_CONNECTION:
        {
            if ( LTEIOT11_OK == lteiot11_check_connection( ) )
            {
                example_state = LTEIOT11_CONFIGURE_FOR_EXAMPLE;
            }
            break;
        }
        case LTEIOT11_CONFIGURE_FOR_EXAMPLE:
        {
            if ( LTEIOT11_OK == lteiot11_configure_for_example( ) )
            {
                example_state = LTEIOT11_EXAMPLE;
            }
            break;
        }
        case LTEIOT11_EXAMPLE:
        {
            lteiot11_example( );
            break;
        }
        default:
        {
            log_error( &logger, " Example 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_TO_MESSAGE.

Example:

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

In order to establish communication with the module, some of the supported MCUs may require the UART RX line to be pulled up additionally either with the external or internal weak pull-up resistor.

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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