gsmgps

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GSM-GPS click

GSM-GPS click is a mikroBUS add-on board with a SIM808 module that combines GSM/GPRS and GPS into a single device.

click Product page

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Click library

• Author : MikroE Team
• Date : May 2020.
• Type : UART GSM/IOT type

Software Support

We provide a library for the Gsmgps 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 Gsmgps Click driver.

Standard key functions :

• Config Object Initialization function.

void gsmgps_cfg_setup ( gsmgps_cfg_t *cfg );

• Initialization function.

GSMGPS_RETVAL gsmgps_init ( gsmgps_t *ctx, gsmgps_cfg_t *cfg );

• Power ON/OFF the module.

void gsmgps_module_power ( gsmgps_t *ctx, uint8_t state );

Example key functions :

• Send command function with parameter.

void gsmgps_send_cmd_with_parameter ( gsmgps_t *ctx, char *at_cmd_buf, char *param_buf );

• GSM-GPS send SMS in PDU mode.

err_t gsmgps_send_sms_pdu ( gsmgps_t *ctx, char *service_center_number, char *phone_number, char *sms_text );

• Generic parser function.

gsmgps_error_t gsmgps_generic_parser ( char *rsp, uint8_t command, uint8_t element, char *parser_buf );

Examples Description

This example reads and processes data from GSM-GPS 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;
    gsmgps_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.

    gsmgps_cfg_setup( &cfg );
    GSMGPS_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    gsmgps_init( &gsmgps, &cfg );

    gsmgps_module_power( &gsmgps, GSMGPS_MODULE_POWER_ON );
    
    // dummy read
    gsmgps_process( );
    gsmgps_clear_app_buf( );
    // AT
    gsmgps_send_cmd( &gsmgps, GSMGPS_CMD_AT );
    app_error_flag = gsmgps_rsp_check( );
    gsmgps_error_check( app_error_flag );
    Delay_ms( 500 );
    
    // ATI - product information
    gsmgps_send_cmd( &gsmgps, GSMGPS_CMD_ATI );
    app_error_flag = gsmgps_rsp_check(  );
    gsmgps_error_check( app_error_flag );
    Delay_ms( 500 );
    
    // CGMR - firmware version
    gsmgps_send_cmd( &gsmgps, GSMGPS_CMD_CGMR );
    app_error_flag = gsmgps_rsp_check(  );
    gsmgps_error_check( app_error_flag );
    Delay_ms( 500 );
    
    // COPS - deregister from network
    gsmgps_send_cmd_with_parameter( &gsmgps, GSMGPS_CMD_COPS, "2" );
    app_error_flag = gsmgps_rsp_check(  );
    gsmgps_error_check( app_error_flag );
    Delay_ms( 500 );
    
    // CGDCONT - set sim apn
    gsmgps_set_sim_apn( &gsmgps, SIM_APN );
    app_error_flag = gsmgps_rsp_check(  );
    gsmgps_error_check( app_error_flag );
    Delay_ms( 500 );
     
    // CFUN - full funtionality
    gsmgps_send_cmd_with_parameter( &gsmgps, GSMGPS_CMD_CFUN, "1" );
    app_error_flag = gsmgps_rsp_check(  );
    gsmgps_error_check( app_error_flag );
    Delay_ms( 500 );
    
    // COPS - automatic mode
    gsmgps_send_cmd_with_parameter( &gsmgps, GSMGPS_CMD_COPS, "0" );
    app_error_flag = gsmgps_rsp_check(  );
    gsmgps_error_check( app_error_flag );
    Delay_ms( 2000 );
    
    // CREG - network registration status
    gsmgps_send_cmd_with_parameter( &gsmgps, GSMGPS_CMD_CREG, "2" );
    app_error_flag = gsmgps_rsp_check(  );
    gsmgps_error_check( app_error_flag );
    Delay_ms( 500 );
    
    // CIMI - request IMSI
    gsmgps_send_cmd( &gsmgps, GSMGPS_CMD_CIMI );
    app_error_flag = gsmgps_rsp_check(  );
    gsmgps_error_check( app_error_flag );
    Delay_ms( 500 );
    
    // CGNSPWR - power ON GPS
    gsmgps_send_cmd_with_parameter( &gsmgps, GSMGPS_CMD_CGNSPWR, "1" );
    app_error_flag = gsmgps_rsp_check(  );
    gsmgps_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( 5000 );
}
  

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
        gsmgps_send_cmd_check( &gsmgps, GSMGPS_CMD_CGATT );
        app_error_flag = gsmgps_rsp_check(  );
        gsmgps_error_check( app_error_flag );
        Delay_ms( 500 );
        
        // CREG - network registration status
        gsmgps_send_cmd_check( &gsmgps, GSMGPS_CMD_CREG );
        app_error_flag = gsmgps_rsp_check(  );
        gsmgps_error_check( app_error_flag );
        Delay_ms( 500 );
        
        // CSQ - signal quality
        gsmgps_send_cmd( &gsmgps, GSMGPS_CMD_CSQ );
        app_error_flag = gsmgps_rsp_check(  );
        gsmgps_error_check( app_error_flag );
        Delay_ms( 5000 );
    }
    else
    {
        log_info( &logger, "CONNECTED TO NETWORK" );
        
        // SMS message format - PDU mode
        gsmgps_send_cmd_with_parameter( &gsmgps, GSMGPS_CMD_CMGF, "0" );
        app_error_flag = gsmgps_rsp_check(  );
        gsmgps_error_check( app_error_flag );
        Delay_ms( 3000 );
        
        for( ; ; )
        {   
            // Get GPS info
            gps_parser_flag = 1;
            gsmgps_send_cmd_with_parameter( &gsmgps, GSMGPS_CMD_CGPSINF, "2" );
            app_error_flag = gsmgps_rsp_check(  );
            gsmgps_error_check( app_error_flag );
            Delay_ms( 3000 );
            
            if ( gps_parser_flag == 0 )
            {
                log_printf( &logger, "> Sending message to phone number...\r\n" );
                gsmgps_send_sms_pdu ( &gsmgps, SIM_SMSC, PHONE_NUMBER_TO_MESSAGE, gps_info_message );
                app_error_flag = gsmgps_rsp_check(  );
                gsmgps_error_check( app_error_flag );
                Delay_ms( 10000 );
                Delay_ms( 10000 );
                Delay_ms( 10000 );
            }
        }
    }
}

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.Gsmgps

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.

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