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mikroSDK Library

WiFi BLE click

Rating:

5

Author: MikroElektronika Team

Last Updated: 2019-04-08

Category: WiFi+BLE

Downloaded: 358 times

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License: MIT license  

WiFi BLE click is a Click board™ which provides Internet and BT/BLE connectivity for any embedded application. It features the ESP32-WROOM-32, an integrated wireless connectivity solution.

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mikroSDK Library Blog

WiFi BLE click

WiFi BLE click

Native view of the WiFi BLE click board.

View full image
WiFi BLE click

WiFi BLE click

Front and back view of the WiFi BLE click board.

View full image

Library Description

Library carries generic command parser adopted for AT command based modules. Generic parser.

Key functions:

  • wifible_cmdSingle - Sends provided command to the module.
  • wifible_setHandler - Handler assignation to the provied command.
  • wifible_modulePower - Turn on module.

Examples description

The application is composed of the three sections :

  • System Initialization - Initializes all necessary GPIO pins, UART used for the communcation with WiFi-BLE module and UART used for infromation logging.
  • Application Initialization - Initializes driver, power on module and sends few command for the default module configuration.
  • Application Task - Waits for valid user input and executes functions based on set of valid commands.

Commands : '+' - Next command 's' - Start command 'e' - change example (WiFi example / BLE example)

Additional Functions :

  • void _packageBeaconData( ) - Package iBeacon data
  • void _WiFi_TCPServer( ) - WiFi example / command list
  • void _BLE_iBeacon( ) - BLE example / command list

Timer initialization and default handler.

Note:

  • For click test we've created two examples which you can change by sending the command [e] to the terminal.
  • In the WiFi example, the module connects to TCP server (we used application called "TCP Server" for Android) and sends the message "MikroE" to it.
  • BLE example demonstrates how WiFi BLE Click acts as iBeacon - with the help of the right commands we've created a beacon which allows us to scan it using the app called Beacon scanner.
  • Only some of the commands that WiFi BLE click supports were used in the example
  • for the rest of the available commands check the documentation
  • Before starting the program it is necessary to provide valid parameters for connecting to the router (SSID, password) as well as the IP address and port of the TCP server which the Click board is going to connect to.
void applicationTask()
{
    uint8_t dataReady_;
    char receivedData_;

    dataReady_ = UART_Rdy_Ptr( );
    wifible_process();
    
    if (dataReady_ != 0)
    {
        receivedData_ = UART_Rd_Ptr( );

        switch (receivedData_)
        {
            case '+' :
            {
                command_cnt++;
                if(command_cnt > 5)
                {
                    command_cnt = 0;
                }
                fCommand = _WIFIBLE_NEXT_COMMAND;
                break;
            }
            case 's' :
            {
                fCommand = _WIFIBLE_START_COMMAND;
                break;
            }
            case 'e' :
            {
                if(fExample == _WIFIBLE_BLE_EXAMPLE)
                {
                    fExample = _WIFIBLE_WIFI_EXAMPLE;
                    mikrobus_logWrite("- Example: WiFi - TCP example ", _LOG_LINE);
                    mikrobus_logWrite("- [+] First command // [e] Next example", _LOG_LINE);
                    command_cnt = -1;
                    fCommand = _WIFIBLE_NO_COMMAND;
                }
                if(fExample == _WIFIBLE_WIFI_EXAMPLE)
                {
                    fExample = _WIFIBLE_BLE_EXAMPLE;
                    mikrobus_logWrite("- Example: BLE - iBeacon example ", _LOG_LINE);
                    mikrobus_logWrite("- [+] First command // [e] Next example", _LOG_LINE);
                    command_cnt = -1;
                    fCommand = _WIFIBLE_NO_COMMAND;
                }
                break;
            }
        }
        
        if(fExample == _WIFIBLE_WIFI_EXAMPLE)
        {
            _WiFi_TCPServer(command_cnt);
        }
        if(fExample == _WIFIBLE_BLE_EXAMPLE)
        {
            _BLE_iBeacon(command_cnt);
        }
    }
}

Alongside with the demo application timer initialization functions are provided. Note that timer is configured acording to default develoment system and MCUs, changing the system or MCU may require update of timer init and timer ISR functions.

Other mikroE Libraries used in the example:

  • String
  • Conversion

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB 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.

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