Stay connected with the world no matter where you are, thanks to the SARA-G350 and PIC32MZ2048EFM100
Your key to global communication, packed in a compact solution
Published Nov 03, 2023
Click board™
GSM 4 Click
Dev. board
Curiosity PIC32 MZ EF
Compiler
NECTO Studio
MCU
PIC32MZ2048EFM100
Our compact quad-band GSM cellular network communication solution ensures uninterrupted connectivity across the globe, making you accessible wherever you are
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Hardware Overview
How does it work?
GSM 4 Click is based on the SARA-G350, a quad-band 2.5G GSM/GPRS module from u-blox. It covers frequencies of 850/900 MHz and 1800/1900 MHz. It is class 10 compliant, featuring 4 download slots / 2 upload slots, supporting 5 slots in total. This module is the main component of the click board, and it consists of a number of internal blocks or sections, such as the antenna switching section, RF transceiver section, memory, power management, and most importantly - the cellular baseband processor. The SARA-G350 module offers extensive audio features, including half rate, full rate, enhanced full rate and adaptive multi-rate voice codecs, superior echo cancellation and noise reduction, multiple pre-programmed audio profiles, specialized hands-free algorithms, all configurable with the AT commands. The audio DSP section is integrated into the module, and it requires only a few external components. The headset can be connected via the 4-pole 3.5mm audio jack. The Micro SIM card holder on the back of the click board™ is used to install a micro-SIM card. This device cannot be used without a valid
SIM card, which allows connection to the cellular network. Both 1.8V and 3V SIM card types are supported. The voltage needed for the module to work properly is about 4V, and it is derived from the 5V mikroBUS™ rail through the MCP1826, a 1A low drop output (LDO) regulator from Microchip. Digital sections of the SARA-G350 are internally supplied by 1.8V, so it is necessary to condition the communication bus lines that connect the host MCU with the module. SARA-G350 outputs 1.8V output from its internal LDO, providing a needed reference voltage for one side of the TXB0106, a 6-bit bidirectional level shifting and voltage translator with automatic direction sensing from Texas Instruments. GSM 4 Click uses a standard 2-Wire UART interface to communicate with the host MCU, with commonly used UART RX, TX, and hardware flow control pins UART RTS and CTS. The UART interface supports baud rates from 2400 bps to 115.2 kbps and automatic baud rate detection up to 115.2 kbps. The automatic baud rate detection mode is set by default. Besides the library we provide, you can use a standard AT
Commands set. Pin RI is a ring indicator if using GSM 4 Click for a phone call or similar applications. The PWR pin is used to power up the module in the same way as the PWR button. The status of the module host MCU can be read over the STA pin. This same line is routed to the STAT LED for visual presentation. In addition, for this module, there is TX LED also. GSM 4 click offers a USB interface via the micro-USB connector, routed to the FT230X IC, a well-established USB to UART solution from FTDI Company. Besides the level shifter IC, the same UART lines from the SARA-G350 are also routed to this USB to the UART IC, offering easy access to the SARA-G350 module via the personal computer and USB connection. There are two LEDs, red and yellow, labeled TX and RX, used to provide visual feedback on the USB to UART communication. This Click board™ can operate with either 3.3V or 5V logic voltage levels selected via the PWR SEL jumper. Also, this Click board™ comes equipped with a library containing easy-to-use functions and an example code that can be used for further development.
Features overview
Development board
Curiosity PIC32 MZ EF development board is a fully integrated 32-bit development platform featuring the high-performance PIC32MZ EF Series (PIC32MZ2048EFM) that has a 2MB Flash, 512KB RAM, integrated FPU, Crypto accelerator, and excellent connectivity options. It includes an integrated programmer and debugger, requiring no additional hardware. Users can expand
functionality through MIKROE mikroBUS™ Click™ adapter boards, add Ethernet connectivity with the Microchip PHY daughter board, add WiFi connectivity capability using the Microchip expansions boards, and add audio input and output capability with Microchip audio daughter boards. These boards are fully integrated into PIC32’s powerful software framework, MPLAB Harmony,
which provides a flexible and modular interface to application development a rich set of inter-operable software stacks (TCP-IP, USB), and easy-to-use features. The Curiosity PIC32 MZ EF development board offers expansion capabilities making it an excellent choice for a rapid prototyping board in Connectivity, IOT, and general-purpose applications.
Microcontroller Overview
MCU Card / MCU
Architecture
PIC32
MCU Memory (KB)
2048
Silicon Vendor
Microchip
Pin count
100
RAM (Bytes)
524288
You complete me!
Accessories
Rubber Antenna GSM/GPRS Right Angle is the perfect companion for all GSM Click boards™ in our extensive lineup. This specialized antenna is designed to optimize your wireless connectivity with impressive features. With a wide frequency range spanning 824-894/1710-1990MHz or 890-960/1710-1890MHz, it can handle various frequency bands, ensuring a seamless and reliable connection. The antenna boasts an impedance of 50 Ohms and a gain of 2dB, enhancing signal reception and transmission. Its 70/180MHz bandwidth provides flexibility for diverse applications. The vertical polarization further enhances its performance. With a maximum input power capacity of 50W, this antenna ensures robust communication even under demanding conditions. Measuring a compact 50mm in length and featuring an SMA male connector, the Rubber Antenna GSM/GPRS Right Angle is a versatile and compact solution for your wireless communication needs.
Used MCU Pins
mikroBUS™ mapper
Take a closer look
Click board™ Schematic
Step by step
Project assembly
Start by selecting your development board and Click board™. Begin with the Curiosity PIC32 MZ EF as your development board.
Track your results in real time
Application Output
1. Application Output - In Debug mode, the 'Application Output' window enables real-time data monitoring, offering direct insight into execution results. Ensure proper data display by configuring the environment correctly using the provided tutorial.
2. UART Terminal - Use the UART Terminal to monitor data transmission via a USB to UART converter, allowing direct communication between the Click board™ and your development system. Configure the baud rate and other serial settings according to your project's requirements to ensure proper functionality. For step-by-step setup instructions, refer to the provided tutorial.
3. Plot Output - The Plot feature offers a powerful way to visualize real-time sensor data, enabling trend analysis, debugging, and comparison of multiple data points. To set it up correctly, follow the provided tutorial, which includes a step-by-step example of using the Plot feature to display Click board™ readings. To use the Plot feature in your code, use the function: plot(*insert_graph_name*, variable_name);. This is a general format, and it is up to the user to replace 'insert_graph_name' with the actual graph name and 'variable_name' with the parameter to be displayed.
Software Support
Library Description
This library contains API for GSM 4 Click driver.
Key functions:
gsm4_set_sim_apn- This function sets APN for sim card.gsm4_send_sms_text- This function sends text message to a phone number.gsm4_send_sms_pdu- This function sends text message to a phone number in PDU mode.
Open Source
Code example
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.
/*!
* @file main.c
* @brief GSM 4 Click Example.
*
* # Description
* Application example shows device capability of connecting to the network and
* sending SMS or TCP/UDP messages using standard "AT" commands.
*
* The demo application is composed of two sections :
*
* ## Application Init
* Initializes the driver, tests the communication by sending "AT" command, and after that restarts the device.
*
* ## Application Task
* Application task is split in few stages:
* - GSM4_CONFIGURE_FOR_NETWORK:
* Sets configuration to device to be able to connect to the network.
*
* - GSM4_WAIT_FOR_CONNECTION:
* Waits for the network registration indicated via CREG URC event and then checks
* the connection status.
*
* - GSM4_CONFIGURE_FOR_EXAMPLE:
* Sets the device configuration for sending SMS or TCP/UDP messages depending on the selected demo example.
*
* - GSM4_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.
*
* ## Additional Function
* - static void gsm4_clear_app_buf ( void )
* - static err_t gsm4_process ( void )
* - static void gsm4_error_check( err_t error_flag )
* - static void gsm4_log_app_buf ( void )
* - static err_t gsm4_rsp_check ( uint8_t *rsp )
* - static err_t gsm4_configure_for_connection( void )
* - static err_t gsm4_check_connection( void )
* - static err_t gsm4_configure_for_messages( void )
* - static err_t gsm4_send_message( void )
*
* @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"
*
* @author Stefan Filipovic
*
*/
#include "board.h"
#include "log.h"
#include "gsm4.h"
#include "conversions.h"
// Example selection macros
#define EXAMPLE_TCP_UDP 0 // Example of sending messages to a TCP/UDP echo server
#define EXAMPLE_SMS 1 // Example of sending SMS to a phone number
#define DEMO_EXAMPLE EXAMPLE_TCP_UDP // Example selection macro
// SIM APN config
#define SIM_APN "internet" // Set valid SIM APN
// SMS example parameters
#define SIM_SMSC "" // Set valid SMS Service Center Address - only in SMS PDU mode
#define PHONE_NUMBER_TO_MESSAGE "" // Set Phone number to message
#define SMS_MODE "1" // SMS mode: "0" - PDU, "1" - TXT
// TCP/UDP example parameters
#define REMOTE_IP "77.46.162.162" // TCP/UDP echo server IP address
#define REMOTE_PORT "51111" // TCP/UDP echo server port
// Message content
#define MESSAGE_CONTENT "GSM 4 click board - demo example."
// Application buffer size
#define APP_BUFFER_SIZE 256
#define PROCESS_BUFFER_SIZE 256
/**
* @brief Example states.
* @details Predefined enum values for application example state.
*/
typedef enum
{
GSM4_CONFIGURE_FOR_NETWORK = 1,
GSM4_WAIT_FOR_CONNECTION,
GSM4_CONFIGURE_FOR_EXAMPLE,
GSM4_EXAMPLE
} gsm4_example_state_t;
static gsm4_t gsm4;
static log_t logger;
/**
* @brief Application example variables.
* @details Variables used in application example.
*/
static uint8_t app_buf[ APP_BUFFER_SIZE ] = { 0 };
static int32_t app_buf_len = 0;
static err_t error_flag;
static gsm4_example_state_t example_state;
/**
* @brief Clearing application buffer.
* @details This function clears memory of application
* buffer and reset its length and counter.
*/
static void gsm4_clear_app_buf ( void );
/**
* @brief Data reading function.
* @details This function reads data from device and
* appends it to the application buffer.
* @return @li @c 0 - Some data is read.
* @li @c -1 - Nothing is read.
* See #err_t definition for detailed explanation.
*/
static err_t gsm4_process ( void );
/**
* @brief Check for errors.
* @details This function checks for different types of
* errors and logs them on UART or logs the response if no errors occured.
* @param[in] error_flag Error flag to check.
*/
static void gsm4_error_check ( err_t error_flag );
/**
* @brief Logs application buffer.
* @details This function logs data from application buffer.
*/
static void gsm4_log_app_buf ( void );
/**
* @brief Response check.
* @details This function checks for response and
* returns the status of response.
* @param[in] rsp Expected response.
* @return @li @c 0 - OK response.
* @li @c -2 - Timeout error.
* @li @c -3 - Command error.
* @li @c -4 - Unknown error.
* See #err_t definition for detailed explanation.
*/
static err_t gsm4_rsp_check ( uint8_t *rsp );
/**
* @brief Configure device for connection to the network.
* @details Sends commands to configure and enable
* connection to the specified network.
* @return @li @c 0 - OK response.
* @li @c -2 - Timeout error.
* @li @c -3 - Command error.
* @li @c -4 - Unknown error.
* See #err_t definition for detailed explanation.
*/
static err_t gsm4_configure_for_network ( void );
/**
* @brief Wait for connection signal.
* @details Wait for connection signal from CREG URC.
* @return @li @c 0 - OK response.
* @li @c -2 - Timeout error.
* @li @c -3 - Command error.
* @li @c -4 - Unknown error.
* See #err_t definition for detailed explanation.
*/
static err_t gsm4_check_connection ( void );
/**
* @brief Configure device for example.
* @details Configure device for the specified example.
* @return @li @c 0 - OK response.
* @li @c -2 - Timeout error.
* @li @c -3 - Command error.
* @li @c -4 - Unknown error.
* See #err_t definition for detailed explanation.
*/
static err_t gsm4_configure_for_example ( void );
/**
* @brief Execute example.
* @details This function executes SMS or TCP/UDP example depending on the DEMO_EXAMPLE macro.
* @return @li @c 0 - OK response.
* @li @c -2 - Timeout error.
* @li @c -3 - Command error.
* @li @c -4 - Unknown error.
* See #err_t definition for detailed explanation.
*/
static err_t gsm4_example ( void );
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
gsm4_cfg_t gsm4_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.
gsm4_cfg_setup( &gsm4_cfg );
GSM4_MAP_MIKROBUS( gsm4_cfg, MIKROBUS_1 );
if ( UART_ERROR == gsm4_init( &gsm4, &gsm4_cfg ) )
{
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
gsm4_process( );
gsm4_clear_app_buf( );
// Check communication
gsm4_send_cmd( &gsm4, GSM4_CMD_AT );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
gsm4_error_check( error_flag );
// Restart device
#define RESTART_DEVICE "1,1"
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_CFUN, RESTART_DEVICE );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
gsm4_error_check( error_flag );
log_info( &logger, " Application Task " );
example_state = GSM4_CONFIGURE_FOR_NETWORK;
}
void application_task ( void )
{
switch ( example_state )
{
case GSM4_CONFIGURE_FOR_NETWORK:
{
if ( GSM4_OK == gsm4_configure_for_network( ) )
{
example_state = GSM4_WAIT_FOR_CONNECTION;
}
break;
}
case GSM4_WAIT_FOR_CONNECTION:
{
if ( GSM4_OK == gsm4_check_connection( ) )
{
example_state = GSM4_CONFIGURE_FOR_EXAMPLE;
}
break;
}
case GSM4_CONFIGURE_FOR_EXAMPLE:
{
if ( GSM4_OK == gsm4_configure_for_example( ) )
{
example_state = GSM4_EXAMPLE;
}
break;
}
case GSM4_EXAMPLE:
{
gsm4_example( );
break;
}
default:
{
log_error( &logger, " Example state." );
break;
}
}
}
void main ( void )
{
application_init( );
for ( ; ; )
{
application_task( );
}
}
static void gsm4_clear_app_buf ( void )
{
memset( app_buf, 0, app_buf_len );
app_buf_len = 0;
}
static err_t gsm4_process ( void )
{
uint8_t rx_buf[ PROCESS_BUFFER_SIZE ] = { 0 };
int32_t rx_size = 0;
rx_size = gsm4_generic_read( &gsm4, rx_buf, PROCESS_BUFFER_SIZE );
if ( rx_size > 0 )
{
int32_t buf_cnt = app_buf_len;
if ( ( ( app_buf_len + rx_size ) > APP_BUFFER_SIZE ) && ( app_buf_len > 0 ) )
{
buf_cnt = APP_BUFFER_SIZE - ( ( app_buf_len + rx_size ) - APP_BUFFER_SIZE );
memmove ( app_buf, &app_buf[ APP_BUFFER_SIZE - buf_cnt ], buf_cnt );
}
for ( int32_t rx_cnt = 0; rx_cnt < rx_size; rx_cnt++ )
{
if ( rx_buf[ rx_cnt ] )
{
app_buf[ buf_cnt++ ] = rx_buf[ rx_cnt ];
if ( app_buf_len < APP_BUFFER_SIZE )
{
app_buf_len++;
}
}
}
return GSM4_OK;
}
return GSM4_ERROR;
}
static err_t gsm4_rsp_check ( uint8_t *rsp )
{
uint32_t timeout_cnt = 0;
uint32_t timeout = 120000;
gsm4_clear_app_buf( );
gsm4_process( );
while ( ( 0 == strstr( app_buf, rsp ) ) &&
( 0 == strstr( app_buf, GSM4_RSP_ERROR ) ) )
{
gsm4_process( );
if ( timeout_cnt++ > timeout )
{
gsm4_clear_app_buf( );
return GSM4_ERROR_TIMEOUT;
}
Delay_ms( 1 );
}
Delay_ms( 100 );
gsm4_process( );
if ( strstr( app_buf, rsp ) )
{
return GSM4_OK;
}
else if ( strstr( app_buf, GSM4_RSP_ERROR ) )
{
return GSM4_ERROR_CMD;
}
else
{
return GSM4_ERROR_UNKNOWN;
}
}
static void gsm4_error_check ( err_t error_flag )
{
switch ( error_flag )
{
case GSM4_OK:
{
gsm4_log_app_buf( );
break;
}
case GSM4_ERROR:
{
log_error( &logger, " Overflow!" );
break;
}
case GSM4_ERROR_TIMEOUT:
{
log_error( &logger, " Timeout!" );
break;
}
case GSM4_ERROR_CMD:
{
log_error( &logger, " CMD!" );
break;
}
case GSM4_ERROR_UNKNOWN:
default:
{
log_error( &logger, " Unknown!" );
break;
}
}
Delay_ms( 500 );
}
static void gsm4_log_app_buf ( void )
{
for ( int32_t buf_cnt = 0; buf_cnt < app_buf_len; buf_cnt++ )
{
log_printf( &logger, "%c", app_buf[ buf_cnt ] );
}
}
static err_t gsm4_configure_for_network ( void )
{
err_t func_error = GSM4_OK;
#if ( ( DEMO_EXAMPLE == EXAMPLE_TCP_UDP ) || ( DEMO_EXAMPLE == EXAMPLE_SMS ) )
Delay_ms ( 5000 );
// Deregister from network
#define DEREGISTER_FROM_NETWORK "2"
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_COPS, DEREGISTER_FROM_NETWORK );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
// Set SIM APN
gsm4_set_sim_apn( &gsm4, SIM_APN );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
// Enable full functionality
#define FULL_FUNCTIONALITY "1"
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_CFUN, FULL_FUNCTIONALITY );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
// Enable network registartion
#define ENABLE_REG "2"
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_CREG, ENABLE_REG );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
// Automatic registration
#define AUTOMATIC_REGISTRATION "0"
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_COPS, AUTOMATIC_REGISTRATION );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
#endif
return func_error;
}
static err_t gsm4_check_connection ( void )
{
#if ( ( DEMO_EXAMPLE == EXAMPLE_TCP_UDP ) || ( DEMO_EXAMPLE == EXAMPLE_SMS ) )
#define CONNECTED "+CREG: 2,1"
gsm4_send_cmd_check ( &gsm4, GSM4_CMD_CREG );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
gsm4_error_check( error_flag );
if ( strstr( app_buf, CONNECTED ) )
{
Delay_ms( 100 );
// Check signal quality
gsm4_send_cmd( &gsm4, GSM4_CMD_CSQ );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
gsm4_error_check( error_flag );
#define NO_SIGNAL "99,99"
if ( !strstr( app_buf, NO_SIGNAL ) )
{
Delay_ms ( 1000 );
return error_flag;
}
}
Delay_ms ( 1000 );
return GSM4_ERROR;
#endif
return GSM4_OK;
}
static err_t gsm4_configure_for_example ( void )
{
err_t func_error = GSM4_OK;
#if ( DEMO_EXAMPLE == EXAMPLE_TCP_UDP )
#define ACTIVATE_PDP_CONTEXT "1,1"
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_CGACT, ACTIVATE_PDP_CONTEXT );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
#define ACTIVATE_PDP_PROFILE "0,3"
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_UPSDA, ACTIVATE_PDP_PROFILE );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
#elif ( DEMO_EXAMPLE == EXAMPLE_SMS )
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_CMGF, SMS_MODE );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
#else
#error "No demo example selected"
#endif
return func_error;
}
static err_t gsm4_example ( void )
{
err_t func_error = GSM4_OK;
#if ( DEMO_EXAMPLE == EXAMPLE_TCP_UDP )
uint8_t cmd_buf[ 100 ] = { 0 };
uint8_t urc_buf[ 20 ] = { 0 };
uint16_t timeout_cnt = 0;
uint16_t timeout = 30000;
uint8_t * __generic_ptr socket_num_buf = 0;
uint8_t tcp_socket_num[ 2 ] = { 0 };
uint8_t udp_socket_num[ 2 ] = { 0 };
// Create TCP socket
#define RSP_USOCR "+USOCR: "
#define TCP_PROTOCOL "6"
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_USOCR, TCP_PROTOCOL );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
socket_num_buf = strstr( app_buf, RSP_USOCR ) + strlen ( RSP_USOCR );
tcp_socket_num[ 0 ] = *socket_num_buf;
gsm4_error_check( error_flag );
// Create UDP socket
#define UDP_PROTOCOL "17"
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_USOCR, UDP_PROTOCOL );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
socket_num_buf = strstr( app_buf, RSP_USOCR ) + strlen ( RSP_USOCR );
udp_socket_num[ 0 ] = *socket_num_buf;
gsm4_error_check( error_flag );
// Connect TCP socket to remote IP and port
strcpy( cmd_buf, tcp_socket_num );
strcat( cmd_buf, ",\"" );
strcat( cmd_buf, REMOTE_IP );
strcat( cmd_buf, "\"," );
strcat( cmd_buf, REMOTE_PORT );
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_USOCO, cmd_buf );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
// Connect UDP socket to remote IP and port
strcpy( cmd_buf, udp_socket_num );
strcat( cmd_buf, ",\"" );
strcat( cmd_buf, REMOTE_IP );
strcat( cmd_buf, "\"," );
strcat( cmd_buf, REMOTE_PORT );
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_USOCO, cmd_buf );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
// Get message length
uint8_t message_len_buf[ 5 ] = { 0 };
uint16_t message_len = strlen( MESSAGE_CONTENT );
uint16_to_str( message_len, message_len_buf );
l_trim( message_len_buf );
r_trim( message_len_buf );
// Write message to TCP socket
strcpy( cmd_buf, tcp_socket_num );
strcat( cmd_buf, "," );
strcat( cmd_buf, message_len_buf );
strcat( cmd_buf, ",\"" );
strcat( cmd_buf, MESSAGE_CONTENT );
strcat( cmd_buf, "\"" );
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_USOWR, cmd_buf );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
// Read response message from TCP socket
#define URC_READ_SOCKET_DATA "+UUSORD: "
strcpy( urc_buf, URC_READ_SOCKET_DATA );
strcat( urc_buf, tcp_socket_num );
for ( ; ; )
{
gsm4_process( );
uint8_t * __generic_ptr start_response_buf = strstr( app_buf, urc_buf );
if ( start_response_buf )
{
Delay_ms( 100 );
gsm4_process( );
uint8_t response_len_buf[ 5 ] = { 0 };
uint8_t * __generic_ptr start_response_len = strstr( start_response_buf, "," ) + 1;
memcpy ( response_len_buf, start_response_len, app_buf_len - ( start_response_len - app_buf ) );
strcpy( cmd_buf, tcp_socket_num );
strcat( cmd_buf, "," );
strcat( cmd_buf, response_len_buf );
gsm4_log_app_buf( );
gsm4_clear_app_buf( );
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_USORD, cmd_buf );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
break;
}
if ( timeout_cnt++ > timeout )
{
break;
}
Delay_ms( 1 );
}
timeout_cnt = 0;
// Write message to UDP socket
strcpy( cmd_buf, udp_socket_num );
strcat( cmd_buf, "," );
strcat( cmd_buf, message_len_buf );
strcat( cmd_buf, ",\"" );
strcat( cmd_buf, MESSAGE_CONTENT );
strcat( cmd_buf, "\"" );
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_USOWR, cmd_buf );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
// Read response message from UDP socket
strcpy( urc_buf, URC_READ_SOCKET_DATA );
strcat( urc_buf, udp_socket_num );
for ( ; ; )
{
gsm4_process( );
uint8_t * __generic_ptr start_response_buf = strstr( app_buf, urc_buf );
if ( start_response_buf )
{
Delay_ms( 100 );
gsm4_process( );
uint8_t response_len_buf[ 5 ] = { 0 };
uint8_t * __generic_ptr start_response_len = strstr( start_response_buf, "," ) + 1;
memcpy ( response_len_buf, start_response_len, app_buf_len - ( start_response_len - app_buf ) );
strcpy( cmd_buf, udp_socket_num );
strcat( cmd_buf, "," );
strcat( cmd_buf, response_len_buf );
gsm4_log_app_buf( );
gsm4_clear_app_buf( );
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_USORF, cmd_buf );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
break;
}
if ( timeout_cnt++ > timeout )
{
break;
}
Delay_ms( 1 );
}
// Close TCP socket
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_USOCL, tcp_socket_num );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
// Close UDP socket
gsm4_send_cmd_with_par( &gsm4, GSM4_CMD_USOCL, udp_socket_num );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
Delay_ms( 5000 );
#elif ( DEMO_EXAMPLE == EXAMPLE_SMS )
// Check SMS mode
#define CMGF_PDU "+CMGF: 0"
#define CMGF_TXT "+CMGF: 1"
gsm4_send_cmd_check( &gsm4, GSM4_CMD_CMGF );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
if ( strstr( app_buf, CMGF_PDU ) )
{
// Send SMS in PDU mode
gsm4_send_sms_pdu( &gsm4, SIM_SMSC, PHONE_NUMBER_TO_MESSAGE, MESSAGE_CONTENT );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
}
else if ( strstr( app_buf, CMGF_TXT ) )
{
// Send SMS in TXT mode
gsm4_send_sms_text ( &gsm4, PHONE_NUMBER_TO_MESSAGE, MESSAGE_CONTENT );
error_flag = gsm4_rsp_check( GSM4_RSP_OK );
func_error |= error_flag;
gsm4_error_check( error_flag );
}
Delay_ms( 10000 );
Delay_ms( 10000 );
Delay_ms( 10000 );
#else
#error "No demo example selected"
#endif
return func_error;
}
// ------------------------------------------------------------------------ END
