gsm2

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GSM 2 Click

GSM 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.

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Click Library

• Author : Stefan Filipovic
• Date : May 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 using standard "AT" commands.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.GSM2

Example Key Functions

• gsm2_cfg_setup Config Object Initialization function.

  void gsm2_cfg_setup ( gsm2_cfg_t *cfg );

• gsm2_init Initialization function.

  err_t gsm2_init ( gsm2_t *ctx, gsm2_cfg_t *cfg );

• gsm2_set_sim_apn This function sets APN for sim card.

  void gsm2_set_sim_apn ( gsm2_t *ctx, uint8_t *sim_apn );

• gsm2_send_sms_text This function sends text message to a phone number.

  void gsm2_send_sms_text ( gsm2_t *ctx, uint8_t *phone_number, uint8_t *sms_text );

• gsm2_send_sms_pdu This function sends text message to a phone number in PDU mode.

  err_t gsm2_send_sms_pdu ( gsm2_t *ctx, uint8_t *service_center_number, uint8_t *phone_number, uint8_t *sms_text );

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;  
    gsm2_cfg_t gsm2_cfg;  

    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );
 
    // Click initialization.
    gsm2_cfg_setup( &gsm2_cfg );
    GSM2_MAP_MIKROBUS( gsm2_cfg, MIKROBUS_1 );
    if ( UART_ERROR == gsm2_init( &gsm2, &gsm2_cfg ) )
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );
        for ( ; ; );
    }
    
    gsm2_process( );
    gsm2_clear_app_buf( );
 
    // Check communication
    gsm2_send_cmd( &gsm2, GSM2_CMD_AT );
    error_flag = gsm2_rsp_check( GSM2_RSP_OK );
    gsm2_error_check( error_flag );
    
    // Restart device
    #define RESTART_DEVICE "1,1"
    gsm2_send_cmd_with_par( &gsm2, GSM2_CMD_CFUN, RESTART_DEVICE );
    error_flag = gsm2_rsp_check( GSM2_RSP_OK );
    gsm2_error_check( error_flag );
    
    log_info( &logger, " Application Task " );
    example_state = GSM2_CONFIGURE_FOR_NETWORK;
}

Application Task

Application task is split in few stages:

• GSM2_CONFIGURE_FOR_NETWORK:

  Sets configuration to device to be able to connect to the network.

• GSM2_WAIT_FOR_CONNECTION:

  Waits for the network registration indicated via CREG URC event and then checks the connection status.

• GSM2_CONFIGURE_FOR_EXAMPLE:

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

• GSM2_EXAMPLE:

  Depending on the selected demo example, it sends an SMS message (in PDU or TXT mode) or TCP/UDP message. By default, the TCP/UDP example is selected.

void application_task ( void ) 
{
    switch ( example_state )
    {
        case GSM2_CONFIGURE_FOR_NETWORK:
        {
            if ( GSM2_OK == gsm2_configure_for_network( ) )
            {
                example_state = GSM2_WAIT_FOR_CONNECTION;
            }
            break;
        }
        case GSM2_WAIT_FOR_CONNECTION:
        {
            if ( GSM2_OK == gsm2_check_connection( ) )
            {
                example_state = GSM2_CONFIGURE_FOR_EXAMPLE;
            }
            break;
        }
        case GSM2_CONFIGURE_FOR_EXAMPLE:
        {
            if ( GSM2_OK == gsm2_configure_for_example( ) )
            {
                example_state = GSM2_EXAMPLE;
            }
            break;
        }
        case GSM2_EXAMPLE:
        {
            gsm2_example( );
            break;
        }
        default:
        {
            log_error( &logger, " Example state." );
            break;
        }
    }
}

Note

In order for the examples to work, 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"

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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