ESP8684 Click

ESP8664 Click is a compact add-on board that contains a wireless combo module. This board features the ESP8684-MINI-1, a highly integrated WiFi, and a Bluetooth 5 module from Espressif Systems. It simultaneously supports BSS in Station mode, SoftAP mode, Station + SoftAP mode, and promiscuous mode.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Jun 2023.
• Type : UART type

Software Support

We provide a library for the ESP8684 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 ESP8684 Click driver.

Standard key functions :

• esp8684_cfg_setup Config Object Initialization function.

  void esp8684_cfg_setup ( esp8684_cfg_t *cfg );

• esp8684_init Initialization function.

  err_t esp8684_init ( esp8684_t *ctx, esp8684_cfg_t *cfg );

• esp8684_default_cfg Click Default Configuration function.

  void esp8684_default_cfg ( esp8684_t *ctx );

Example key functions :

• esp8684_send_cmd ESP8684 send command with arguments function.

  void esp8684_send_cmd ( esp8684_t *ctx, uint8_t *cmd, uint8_t *args );

• esp8684_send_query_cmd ESP8684 send query command function.

  void esp8684_send_query_cmd ( esp8684_t *ctx, uint8_t *cmd );

• esp8684_connect_to_network ESP8684 connect to network function.

  void esp8684_connect_to_network ( esp8684_t* ctx, uint8_t *ssid, uint8_t *password );

Example Description

This example connects to the desired WiFi network and then connects to the TCP/UDP server, writes then reads data to and from it.

The demo application is composed of two sections :

Application Init

Initializes driver and wifi communication, then connects to the desired WiFi network and sends data to the TCP/UDP server.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    esp8684_cfg_t esp8684_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.
    esp8684_cfg_setup( &esp8684_cfg );
    ESP8684_MAP_MIKROBUS( esp8684_cfg, MIKROBUS_1 );
    if ( UART_ERROR == esp8684_init( &esp8684, &esp8684_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    esp8684_default_cfg( &esp8684 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    esp8684_process( );
    esp8684_clear_app_buf( );

    esp8684_send_cmd( &esp8684, ESP8684_CMD_AT, NULL );
    app_error_flag = esp8684_rsp_check( ESP8684_RSP_OK );
    esp8684_error_check( app_error_flag );
    Delay_ms ( 500 );

    esp8684_send_cmd( &esp8684, ESP8684_CMD_RST, NULL );
    app_error_flag = esp8684_rsp_check( ESP8684_RSP_READY );
    esp8684_error_check( app_error_flag );
    Delay_ms ( 500 );
    esp8684_process( );
    esp8684_clear_app_buf();

    esp8684_send_cmd( &esp8684, ESP8684_CMD_GMR, NULL );
    app_error_flag = esp8684_rsp_check( ESP8684_RSP_OK );
    esp8684_error_check( app_error_flag );
    Delay_ms ( 500 );

    // Communication initialization
    esp8684_con_device_to_network ( );

    log_info( &logger, " Application Task " );
}

Application Task

Writes and reads data from TCP/UDP server, processes all incoming data and displays them on the USB UART.

void application_task ( void ) 
{
    log_printf( &logger, "Sending and reading data from the TCP/UDP server \r\n" );
    esp8684_send_data( );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}

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.ESP8684

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.