wifiesp

---

Wifi ESP Click

WiFi ESP 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.

---

Click Library

• Author : MikroE Team
• Date : Jun 2020.
• Type : UART type

Software Support

Example Description

This example connects to the desired WiFi network and then creates web server on the IP address assigned to the Click board. The user can connect to the server via web browser.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.WifiEsp

Example Key Functions

• wifiesp_cfg_setup Config Object Initialization function.

void wifiesp_cfg_setup ( wifiesp_cfg_t *cfg ); 

• wifiesp_init Initialization function.

err_t wifiesp_init ( wifiesp_t *ctx, wifiesp_cfg_t *cfg );

• wifiesp_default_cfg Click Default Configuration function.

void wifiesp_default_cfg ( wifiesp_t *ctx );

• wifiesp_send_cmd Sends AT command to the module.

void wifiesp_send_cmd( wifiesp_t* ctx, uint8_t* cmd, uint8_t* args );

• wifiesp_generic_write Generic write function.

void wifiesp_generic_write ( wifiesp_t *ctx, char *data_buf, uint16_t len );

• wifiesp_generic_read Generic read function.

int32_t wifiesp_generic_read ( wifiesp_t *ctx, char *data_buf, int32_t max_len );

Application Init

Initializes driver and wifi communication, then connects to the desired WiFi network and creates web server on the IP address assigned to the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;
    wifiesp_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.
    wifiesp_cfg_setup( &cfg );
    WIFIESP_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    wifiesp_init( &wifiesp, &cfg );
    wifiesp_default_cfg( &wifiesp );
    Delay_ms ( 1000 );
    
    // Communication initialization
    wifi_communication_init( );
    
    uint16_to_str ( strlen( page ), page_len );
    wifiesp_str_cut_chr ( page_len, ' ' );
    
    log_info( &logger, "Please connect to the IP address listed above.\r\n" );
}

Application Task

Waits for the client request (paste IP address in your web browser and refresh to send a request). The Click board will respond by sending a page content to the client.

void application_task ( void )
{
    if ( WIFIESP_OK == wifiesp_rsp_check( WIFIESP_RECEIVE ) ) 
    {
        link_id[ 0 ] = *( strstr( app_buf, WIFIESP_RECEIVE ) + 5 );
        strcpy ( send_buf, link_id );
        strcat ( send_buf, "," );
        strcat ( send_buf, page_len );
        wifiesp_str_cut_chr ( send_buf, ' ' );
        wifiesp_log_app_buf( );
        wifiesp_clear_app_buf( );
        Delay_ms ( 100 );
        wifiesp_process( );
        wifiesp_log_app_buf( );
        wifiesp_send_cmd( &wifiesp, WIFIESP_SEND, send_buf );
        app_error_flag = wifiesp_rsp_check( WIFIESP_RSP_READY_FOR_SEND );
        wifiesp_log_app_buf( );
        Delay_ms ( 100 );
        wifiesp_generic_write( &wifiesp, page, strlen( page ) );
        app_error_flag = wifiesp_rsp_check( WIFIESP_RSP_SEND_OK );
        wifiesp_error_check( app_error_flag );
        wifiesp_send_cmd( &wifiesp, WIFIESP_CLOSE, link_id );
        app_error_flag = wifiesp_rsp_check( WIFIESP_RSP_OK );
        wifiesp_error_check( app_error_flag );
        wifiesp_clear_app_buf( );
        
        wifiesp_process( );
        wifiesp_log_app_buf( );
        wifiesp_clear_app_buf( );
        uart_clear ( &wifiesp.uart );
        Delay_ms ( 100 );
    }
}

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.

---