gsmgnss2  2.0.0.0
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GSM/GNSS 2 click

GSM/GNSS 2 click combines GPS/GLONASS location tracking with GSM module capability for mobile communication. The click carries SIM868 quad-band GSM/GPRS module.

click Product page


Click library

  • Author : Mikroe Team
  • Date : Mar 2022.
  • Type : UART type

Software Support

We provide a library for the GSM/GNSS 2 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 from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for GSM/GNSS 2 Click driver.

Standard key functions :

Example key functions :

Example Description

This example reads and processes data from GSM/GNSS 2 clicks.

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;
gsmgnss2_cfg_t gsmgnss2_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
gsmgnss2_cfg_setup( &gsmgnss2_cfg );
GSMGNSS2_MAP_MIKROBUS( gsmgnss2_cfg, MIKROBUS_1 );
gsmgnss2_init( &gsmgnss2, &gsmgnss2_cfg );
// dummy read
gsmgnss2_process( );
gsmgnss2_clear_app_buf( );
// AT
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 500 );
// ATI - product information
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 500 );
// CGMR - firmware version
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 500 );
// CMEE - Report Mobile Equipment Error
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 500 );
// COPS - deregister from network
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 500 );
// CGDCONT - set sim apn
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 500 );
// CFUN - full funtionality
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 500 );
// COPS - automatic mode
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 2000 );
// CREG - network registration status
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 500 );
// SMS message format - PDU mode
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 500 );
// QGNSSC - power ON GNSS
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_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 GNSS position fix. Once it get a fix,

it sends an SMS with GNSS info to the selected phone number approximately every 40 seconds.

void application_task ( void )
{
if ( app_connection_status == WAIT_FOR_CONNECTION )
{
// CREG - network registration status
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 500 );
// CSQ - signal quality
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 5000 );
}
else
{
log_info( &logger, "CONNECTED TO NETWORK" );
for ( ; ; )
{
// Get GNSS info
gnss_parser_flag = 1;
for ( ; ; )
{
if ( GSMGNSS2_OK == gsmgnss2_process( ) )
{
gnss_parser_application( app_buf );
if ( gnss_parser_flag == 2 )
{
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
log_printf( &logger, "> Sending message to phone number...\r\n" );
gsmgnss2_send_sms_pdu ( &gsmgnss2, SIM_SMSC, PHONE_NUMBER_TO_MESSAGE, gnss_info_message );
app_error_flag = gsmgnss2_rsp_check( );
gsmgnss2_error_check( app_error_flag );
Delay_ms( 10000 );
Delay_ms( 10000 );
Delay_ms( 10000 );
}
if ( gnss_parser_flag != 1 )
{
break;
}
}
}
}
}
}

Note

A passive GPS antenna is required for the GNSS to receive the position fix. It may take several minutes for the module to receive the fix. 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.

Example:

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

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.GSMGNSS2

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. UART terminal is available in all MikroElektronika compilers.


GSMGNSS2_MAP_MIKROBUS
#define GSMGNSS2_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: gsmgnss2.h:145
GSMGNSS2_CMD_CREG
#define GSMGNSS2_CMD_CREG
Definition: gsmgnss2.h:73
SIM_SMSC
#define SIM_SMSC
Definition: main.c:57
gsmgnss2_init
err_t gsmgnss2_init(gsmgnss2_t *ctx, gsmgnss2_cfg_t *cfg)
GSM/GNSS 2 initialization function.
gsmgnss2_send_sms_pdu
err_t gsmgnss2_send_sms_pdu(gsmgnss2_t *ctx, char *service_center_number, char *phone_number, char *sms_text)
GSM GNSS 2 send SMS in PDU mode.
GSMGNSS2_CMD_AT
#define GSMGNSS2_CMD_AT
GSM/GNSS 2 control commands.
Definition: gsmgnss2.h:69
gsmgnss2_send_cmd_check
void gsmgnss2_send_cmd_check(gsmgnss2_t *ctx, char *at_cmd_buf)
Check the sent command.
gsmgnss2_t
GSM/GNSS 2 Click context object.
Definition: gsmgnss2.h:162
GSMGNSS2_CMD_CMEE
#define GSMGNSS2_CMD_CMEE
Definition: gsmgnss2.h:77
gsmgnss2_module_power
void gsmgnss2_module_power(gsmgnss2_t *ctx, uint8_t state)
Power ON/OFF the module.
gsmgnss2_send_cmd_with_parameter
void gsmgnss2_send_cmd_with_parameter(gsmgnss2_t *ctx, char *at_cmd_buf, char *param_buf)
Send command function with parameter.
GSMGNSS2_CMD_CGNSPWR
#define GSMGNSS2_CMD_CGNSPWR
Definition: gsmgnss2.h:83
application_task
void application_task(void)
Definition: main.c:238
SIM_APN
#define SIM_APN
Definition: main.c:56
gsmgnss2_cfg_setup
void gsmgnss2_cfg_setup(gsmgnss2_cfg_t *cfg)
GSM/GNSS 2 configuration object setup function.
GSMGNSS2_CMD_CGNSTST
#define GSMGNSS2_CMD_CGNSTST
Definition: gsmgnss2.h:84
gsmgnss2_set_sim_apn
void gsmgnss2_set_sim_apn(gsmgnss2_t *ctx, char *sim_apn)
Set sim card APN.
WAIT_FOR_CONNECTION
#define WAIT_FOR_CONNECTION
Definition: main.c:62
GSMGNSS2_CMD_ATI
#define GSMGNSS2_CMD_ATI
Definition: gsmgnss2.h:70
GSMGNSS2_CMD_CGMR
#define GSMGNSS2_CMD_CGMR
Definition: gsmgnss2.h:71
GSMGNSS2_CMD_COPS
#define GSMGNSS2_CMD_COPS
Definition: gsmgnss2.h:80
GSMGNSS2_OK
@ GSMGNSS2_OK
Definition: gsmgnss2.h:216
GSMGNSS2_CMD_CFUN
#define GSMGNSS2_CMD_CFUN
Definition: gsmgnss2.h:72
gsmgnss2_send_cmd
void gsmgnss2_send_cmd(gsmgnss2_t *ctx, char *cmd)
Send command function.
GSMGNSS2_CMD_CSQ
#define GSMGNSS2_CMD_CSQ
Definition: gsmgnss2.h:79
GSMGNSS2_CMD_CMGF
#define GSMGNSS2_CMD_CMGF
Definition: gsmgnss2.h:82
gsmgnss2_cfg_t
GSM/GNSS 2 Click configuration object.
Definition: gsmgnss2.h:188
application_init
void application_init(void)
Definition: main.c:136
GSMGNSS2_MODULE_POWER_ON
#define GSMGNSS2_MODULE_POWER_ON
GSMGNSS 2 module power state.
Definition: gsmgnss2.h:118
PHONE_NUMBER_TO_MESSAGE
#define PHONE_NUMBER_TO_MESSAGE
Definition: main.c:58