wifiesp  2.0.0.0
Main Page

Wifi ESP click

WiFi ESP click carries the ESP-WROOM-02 module that integrates ESP8266EX.

click Product page


Click library

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

Software Support

We provide a library for the WifiEsp 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 WifiEsp Click driver.

Standard key functions :

  • Config Object Initialization function.

    void wifiesp_cfg_setup ( wifiesp_cfg_t *cfg );

  • Initialization function.

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

  • Click Default Configuration function.

    void wifiesp_default_cfg ( wifiesp_t *ctx );

Example key functions :

Examples 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.

The demo application is composed of two sections :

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;
// Logger initialization.
LOG_MAP_USB_UART( log_cfg );
log_cfg.level = LOG_LEVEL_DEBUG;
log_cfg.baud = 115200;
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
WIFIESP_MAP_MIKROBUS( cfg , MIKROBUS_1 );
wifiesp_init( &wifiesp , &cfg );
wifiesp_default_cfg( &wifiesp );
Delay_ms( 1000 );
// Communication initialization
uint16_to_str ( strlen( page ), page_len );
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 )
{
app_error_flag = wifiesp_rsp_check( WIFIESP_RECEIVE );
Delay_ms( 100 );
if ( app_error_flag == APP_OK )
{
strcpy ( send_buf, link_id );
strcat ( send_buf, "," );
strcat ( send_buf, page_len );
str_cut_chr ( send_buf, ' ' );
app_error_flag = wifiesp_rsp_check( RSP_READY_FOR_SEND );
Delay_ms( 100 );
wifiesp_generic_write( &wifiesp, page, strlen( page ) );
app_error_flag = wifiesp_rsp_check( RSP_SEND_OK );
wifiesp_error_check( app_error_flag );
wifiesp_send_cmd( &wifiesp, WIFIESP_CLOSE, link_id );
app_error_flag = wifiesp_rsp_check( RSP_OK );
wifiesp_error_check( app_error_flag );
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.WifiEsp

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.


wifiesp_cfg_setup
void wifiesp_cfg_setup(wifiesp_cfg_t *cfg)
Config Object Initialization function.
wifiesp_init
WIFIESP_RETVAL wifiesp_init(wifiesp_t *ctx, wifiesp_cfg_t *cfg)
Initialization function.
page
uint8_t page[]
Definition: main.c:46
WIFIESP_RECEIVE
#define WIFIESP_RECEIVE
Definition: wifiesp.h:101
APP_OK
#define APP_OK
Definition: main.c:32
WIFIESP_CLOSE
#define WIFIESP_CLOSE
Definition: wifiesp.h:96
RSP_READY_FOR_SEND
#define RSP_READY_FOR_SEND
Definition: main.c:38
application_task
void application_task(void)
Definition: main.c:264
wifiesp_default_cfg
void wifiesp_default_cfg(wifiesp_t *ctx)
Click Default Configuration function.
wifi_communication_init
void wifi_communication_init(void)
Definition: main.c:178
send_buf
uint8_t send_buf[10]
Definition: main.c:49
RSP_SEND_OK
#define RSP_SEND_OK
Definition: main.c:39
wifiesp_cfg_t
Click configuration structure definition.
Definition: wifiesp.h:134
WIFIESP_SEND
#define WIFIESP_SEND
Definition: wifiesp.h:95
application_init
void application_init(void)
Definition: main.c:233
WIFIESP_MAP_MIKROBUS
#define WIFIESP_MAP_MIKROBUS(cfg, mikrobus)
Definition: wifiesp.h:54
wifiesp_send_cmd
void wifiesp_send_cmd(wifiesp_t *ctx, uint8_t *cmd, uint8_t *args)
Sends AT command to the module.
RSP_OK
#define RSP_OK
Definition: main.c:37
page_len
uint8_t page_len[5]
Definition: main.c:48
wifiesp_generic_write
void wifiesp_generic_write(wifiesp_t *ctx, char *data_buf, uint16_t len)
Generic write function.