wifiesp  2.0.0.0
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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 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 :

Example key functions :

Example 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;
LOG_MAP_USB_UART( log_cfg );
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 );
wifiesp_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 )
{
if ( WIFIESP_OK == wifiesp_rsp_check( WIFIESP_RECEIVE ) )
{
link_id[ 0 ] = *( strstr( app_buf, WIFIESP_RECEIVE ) + 5 );
strcpy ( send_buf, link_id );
strcat ( send_buf, "," );
strcat ( send_buf, page_len );
wifiesp_str_cut_chr ( send_buf, ' ' );
wifiesp_log_app_buf( );
wifiesp_clear_app_buf( );
Delay_ms ( 100 );
wifiesp_process( );
wifiesp_log_app_buf( );
app_error_flag = wifiesp_rsp_check( WIFIESP_RSP_READY_FOR_SEND );
wifiesp_log_app_buf( );
Delay_ms ( 100 );
wifiesp_generic_write( &wifiesp, page, strlen( page ) );
app_error_flag = wifiesp_rsp_check( WIFIESP_RSP_SEND_OK );
wifiesp_error_check( app_error_flag );
wifiesp_send_cmd( &wifiesp, WIFIESP_CLOSE, link_id );
app_error_flag = wifiesp_rsp_check( WIFIESP_RSP_OK );
wifiesp_error_check( app_error_flag );
wifiesp_clear_app_buf( );
wifiesp_process( );
wifiesp_log_app_buf( );
wifiesp_clear_app_buf( );
uart_clear ( &wifiesp.uart );
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.
page
uint8_t page[]
Definition: main.c:39
WIFIESP_RECEIVE
#define WIFIESP_RECEIVE
Definition: wifiesp.h:106
wifiesp_t
Click ctx object definition.
Definition: wifiesp.h:131
page_len
uint8_t page_len[10]
Definition: main.c:41
wifiesp_init
err_t wifiesp_init(wifiesp_t *ctx, wifiesp_cfg_t *cfg)
Initialization function.
WIFIESP_OK
@ WIFIESP_OK
Definition: wifiesp.h:172
WIFIESP_CLOSE
#define WIFIESP_CLOSE
Definition: wifiesp.h:101
WIFIESP_RSP_OK
#define WIFIESP_RSP_OK
Definition: wifiesp.h:113
application_task
void application_task(void)
Definition: main.c:262
wifiesp_default_cfg
void wifiesp_default_cfg(wifiesp_t *ctx)
Click Default Configuration function.
wifiesp_generic_read
int32_t wifiesp_generic_read(wifiesp_t *ctx, char *data_buf, int32_t max_len)
Generic read function.
wifi_communication_init
void wifi_communication_init(void)
Definition: main.c:163
WIFIESP_RSP_READY_FOR_SEND
#define WIFIESP_RSP_READY_FOR_SEND
Definition: wifiesp.h:114
send_buf
uint8_t send_buf[10]
Definition: main.c:42
wifiesp_cfg_t
Click configuration structure definition.
Definition: wifiesp.h:148
WIFIESP_SEND
#define WIFIESP_SEND
Definition: wifiesp.h:100
application_init
void application_init(void)
Definition: main.c:228
WIFIESP_MAP_MIKROBUS
#define WIFIESP_MAP_MIKROBUS(cfg, mikrobus)
Definition: wifiesp.h:68
wifiesp_send_cmd
void wifiesp_send_cmd(wifiesp_t *ctx, uint8_t *cmd, uint8_t *args)
Sends AT command to the module.
WIFIESP_RSP_SEND_OK
#define WIFIESP_RSP_SEND_OK
Definition: wifiesp.h:115
wifiesp_generic_write
void wifiesp_generic_write(wifiesp_t *ctx, char *data_buf, uint16_t len)
Generic write function.