WiFi 8 Click

WiFi 8 Click is a compact add-on board that contains a wireless combo module. This board features the ATWINC3400-MR210CA, a Bluetooth 5.0 certified module optimized for low power and high-performance mobile applications from Microchip Technology.

Click Product page

Click library

• Author : Luka Filipovic
• Date : Jan 2021.
• Type : SPI type

Software Support

We provide a library for the WiFi8 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 WiFi8 Click driver.

Standard key functions :

• wifi8_cfg_setup Config Object Initialization function.

  void wifi8_cfg_setup ( wifi8_cfg_t *cfg );

• wifi8_init Initialization function.

  err_t wifi8_init ( wifi8_t *ctx, wifi8_cfg_t *cfg );

• wifi8_default_cfg Click Default Configuration function.

  err_t wifi8_default_cfg ( wifi8_t *ctx );

Example key functions :

• wifi8_init_drv Synchronous API to initialize the device driver.

  err_t wifi8_init_drv(wifi8_t *ctx);

• wifi8_connect Asynchronous Wi-Fi connection function.

  err_t wifi8_connect(wifi8_t *ctx, char *pc_ssid, uint8_t u8_ssid_len, wifi8_m2m_sec_type_t u8_sec_type, void *pv_auth_info, uint16_t u16_ch);

• wifi8_socket_bind Asynchronous bind function associates the provided address and local port to the socket.

  err_t wifi8_socket_bind(wifi8_t *ctx, int8_t sock, wifi8_sockaddr_t *pstr_addr, uint8_t u8_addr_len);

Example Description

This application showcases capability of the WiFi 8 Click board. It initializes device, connects to local WiFi. Creates TCP, waits for connection and logs every message it receives for clients when it receives CR or LF flag it returns message back to Client.

The demo application is composed of two sections :

Application Init

Initializes Host logger, and communication module and pins. Then resets device and initializes devices firmware. If no error occurred it sets callback functions for WiFi and TCP socket, and checks current firmware version. After firmware is read it connects to local WiFi network set by user. When connected it initializes and creates socket.

void application_init(void)
{
    log_cfg_t log_cfg;
    wifi8_cfg_t wifi8_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 ");

    Delay_ms ( 1000 );

    wifi8_cfg_setup(&wifi8_cfg);
    WIFI8_MAP_MIKROBUS(wifi8_cfg, MIKROBUS_1);
    err_t init_flag = wifi8_init(&wifi8, &wifi8_cfg);
    if (init_flag == SPI_MASTER_ERROR)
    {
        log_error(&logger, " Application Init Error. ");
        log_info(&logger, " Please, run program again... ");
        for (;;);
    }

    if (WIFI8_OK != wifi8_default_cfg(&wifi8))
    {
        log_error(&logger, " Default configuartion. ");
        for (;;); 
    }
    //Set callback functions for WiFi and TCP socket
    wifi8.app_wifi_cb = wifi_cb;
    wifi8.app_socket_cb = socket_cb;
    wifi_connected = M2M_WIFI_DISCONNECTED;

    wifi8_m2m_rev_t fw_version;
    if (WIFI8_OK == wifi8_get_full_firmware_version(&wifi8, &fw_version))
    {
        log_printf(&logger, "Firmware HIF (%u) : %u.%u \n", 
                   ((uint16_t)(((fw_version.u16_firmware_hif_info) >> (14)) & (0x3))), 
                   ((uint16_t)(((fw_version.u16_firmware_hif_info) >> (8)) & (0x3f))), 
                   ((uint16_t)(((fw_version.u16_firmware_hif_info) >> (0)) & (0xff))));
        log_printf(&logger, "Firmware ver   : %u.%u.%u \n", 
                   (uint16_t)fw_version.u8_firmware_major, 
                   (uint16_t)fw_version.u8_firmware_minor, 
                   (uint16_t)fw_version.u8_firmware_patch);
        log_printf(&logger, "Firmware Build %s Time %s\n", fw_version.build_date, fw_version.build_time);
    }
    else
    {
        log_error(&logger, " reading full firmware version ");
        for (;;);
    }

    if (wifi_connected == M2M_WIFI_DISCONNECTED)
    {
        if (WIFI8_OK != wifi8_connect(&wifi8, MAIN_WLAN_SSID, sizeof(MAIN_WLAN_SSID), 
                                      MAIN_WLAN_AUTH, MAIN_WLAN_PSK, M2M_WIFI_CH_ALL))
        {
            log_error(&logger, " Connection");
            for (;;);
        }
        else
        {
            log_info(&logger, " Connecting... ");
        }
    }

    while (wifi_connected != M2M_WIFI_CONNECTED)
    {
        wifi8_handle_events(&wifi8);
    }

    wifi8_socket_init(&wifi8);
    addr.sin_family = 2;
    addr.sin_port = (uint16_t)((((uint16_t)((MAIN_TCP_SERVER_PORT))) << 8) | (((uint16_t)((MAIN_TCP_SERVER_PORT))) >> 8));
    addr.sin_addr.s_addr = 0;

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

Application Task

It loops function for handling events. Should notify and log messages when Client is connected/disconnected to TCP server and returns back when receives CR or LF flag.

void application_task(void)
{
    wifi8_handle_events(&wifi8);

    if (tcp_server_socket < 0)
    {

        if ((tcp_server_socket = wifi8_socket_create(&wifi8, 2, 1, 0)) < 0)
        {
            log_printf(&logger, "main: failed to create TCP server socket error!\r\n");
        }
        else
        {
            wifi8_socket_bind(&wifi8, tcp_server_socket, (wifi8_sockaddr_t *)&addr,
                              sizeof(wifi8_sockaddr_in_t));
        }
    }
}

Note

User should set MAIN_WLAN_SSID and MAIN_WLAN_PSK for connecting to local network. When devices connects to network it will log its IP that user need to connect to. After user connects it should get notification and it can send data to server. Server will return message "WiFi 8 Click" when Client sends CR or LF character in message.

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.WiFi8

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.