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WiFi 9 Click

WiFi 9 Click is fully embedded stand-alone Wi-Fi module, equipped with the PAN9420 a 2.4 GHz ISM band Wi-Fi-embedded module which includes a wireless radio and an MCU for easy integration of Wi-Fi connectivity into various electronic devices.

Click Product page

Click library

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

Software Support

We provide a library for the Wifi9 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 Wifi9 Click driver.

Standard key functions :

  • wifi9_cfg_setup Config Object Initialization function.
void wifi9_cfg_setup ( wifi9_cfg_t *cfg );
  • wifi9_init Initialization function.
err_t wifi9_init ( wifi9_t *ctx, wifi9_cfg_t *cfg );

Example key functions :

  • wifi9_select_uart Switch to a command or binary uart
void wifi9_select_uart ( wifi9_t *ctx, uint8_t uart_select );
  • wifi9_reset_device Module reset.
void wifi9_reset_device ( wifi9_t *ctx );
  • wifi9_send_command Send Command function.
void wifi9_send_command ( wifi9_t *ctx, uint8_t *command );

Examples Description

This application showcases capability of the WiFi 9 Click board. It initializes device, connects to local WiFi. Creates TCP server, waits for connection, and logs every message it receives from clients and returns back those messages as an echo response.

The demo application is composed of two sections :

Application Init

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

void application_init ( void )
{
    log_cfg_t log_cfg;
    wifi9_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.
    wifi9_cfg_setup( &cfg );
    WIFI9_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    wifi9_init( &wifi9, &cfg );

    wifi9_reset_device( &wifi9 );
    wifi9_select_uart( &wifi9, WIFI9_SELECT_CMD_UART );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    wifi9_process( );
    wifi9_clear_app_buf( );
    
    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "---- System Info ----\r\n" );
    log_printf( &logger, "---------------------\r\n" );

    wifi9_send_command( &wifi9, WIFI9_CMD_GET_SYSTEM_FIRMWARE );
    wifi9_rsp_check( WIFI9_CMD_GET_SYSTEM_FIRMWARE );
    wifi9_log_app_buf( );

    wifi9_send_command( &wifi9, WIFI9_CMD_GET_SYSTEM_MAC_ADDR );
    wifi9_rsp_check( WIFI9_CMD_GET_SYSTEM_MAC_ADDR );
    wifi9_log_app_buf( );

    wifi9_send_command( &wifi9, WIFI9_CMD_GET_SYSTEM_SERIAL_NUM );
    wifi9_rsp_check( WIFI9_CMD_GET_SYSTEM_SERIAL_NUM );
    wifi9_log_app_buf( );

    wifi9_send_command( &wifi9, WIFI9_CMD_GET_SYSTEM_RADIO_VER );
    wifi9_rsp_check( WIFI9_CMD_GET_SYSTEM_RADIO_VER );
    wifi9_log_app_buf( );

    wifi9_send_command( &wifi9, WIFI9_CMD_GET_SYSTEM_BOOTL_VER );
    wifi9_rsp_check( WIFI9_CMD_GET_SYSTEM_BOOTL_VER );
    wifi9_log_app_buf( );

    wifi9_send_command( &wifi9, WIFI9_CMD_GET_SYSTEM_HW_REV );
    wifi9_rsp_check( WIFI9_CMD_GET_SYSTEM_HW_REV );
    wifi9_log_app_buf( );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf( &logger, "--------------------------\r\n" );
    log_printf( &logger, "---- Start NETCAT app ----\r\n" );
    log_printf( &logger, "--------------------------\r\n" );
    
    log_printf( &logger, "\r\nSet Station to ON status: " );
    wifi9_send_command( &wifi9, WIFI9_CMD_SET_WLAN_STATE_STA_ON );
    wifi9_rsp_check( WIFI9_CMD_SET_WLAN_STATE );
    wifi9_log_app_buf( );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );

    log_printf( &logger, "\r\nSet Station SSID and PASSWORD: " );
    strcpy( app_buf, WIFI9_CMD_SET_WLAN_CFG_STA );
    strcat( app_buf, " \"" );
    strcat( app_buf, EXAMPLE_SSID );
    strcat( app_buf, "\" \"" );
    strcat( app_buf, EXAMPLE_PASSWORD );
    strcat( app_buf, "\" 4" );
    wifi9_send_command( &wifi9, app_buf );
    wifi9_rsp_check( WIFI9_CMD_SET_WLAN_CFG );
    wifi9_log_app_buf( );
    Delay_ms ( 500 );
    
    log_printf( &logger, "\r\nTurn ON - Netcat module: " );
    wifi9_send_command( &wifi9, WIFI9_CMD_SET_NETCAT_STATE_ON );
    wifi9_rsp_check( WIFI9_CMD_SET_NETCAT_STATE );
    wifi9_log_app_buf( );
    Delay_ms ( 500 );
    
    log_printf( &logger, "\r\nExclude Netcat authentication: " );
    wifi9_send_command( &wifi9, WIFI9_CMD_SET_NETCAT_AUTH_OFF );
    wifi9_rsp_check( WIFI9_CMD_SET_NETCAT_AUTH );
    wifi9_log_app_buf( );
    Delay_ms ( 500 );
    
    log_printf( &logger, "\r\nSet the Netcat module server port: " );
    strcpy( app_buf, WIFI9_CMD_SET_NETCAT_CFG_SERVER );
    strcat( app_buf, " " );
    strcat( app_buf, EXAMPLE_SERVER_PORT );
    wifi9_send_command( &wifi9, app_buf );
    wifi9_rsp_check( WIFI9_CMD_SET_NETCAT_CFG );
    wifi9_log_app_buf( );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    
    log_printf( &logger, "\r\nWaiting for an IP address assignment from DHCP server...\r\n" );
    for ( ; ; )
    {
        log_printf( &logger, "\r\nGet IP address: " );
        wifi9_send_command( &wifi9, WIFI9_CMD_GET_NET_CFG_STA );
        wifi9_rsp_check( WIFI9_CMD_GET_NET_CFG );
        wifi9_log_app_buf( );
        if ( !strstr ( app_buf, "0.0.0.0" ) )
        {
            break;
        }
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
    }
    wifi9_clear_app_buf( );
    Delay_ms ( 1000 );
    
    log_printf( &logger, "\r\nNow you can connect to the TCP server listed above via a TCP client app\r\n" );  
    log_printf( &logger, "The module is transferred to BIN-UART - for data collection\r\n" );

    wifi9_select_uart( &wifi9, WIFI9_SELECT_BIN_UART );
    log_info( &logger, " Application Task " );
    Delay_ms ( 1000 );
}

Application Task

All data received from the TCP clients will be logger to USB UART and echoed back to the clients.

void application_task ( void )
{
    wifi9_process( );
    if ( app_buf_len )
    {
        wifi9_log_app_buf( );
        wifi9_generic_write( &wifi9, app_buf, app_buf_len );
        wifi9_clear_app_buf( );
        Delay_ms ( 100 );
    }
}

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.Wifi9

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.