Skip to product information
1 of 4

MikroElektronika

WiFi ESP click

WiFi ESP click

SKU:MIKROE-2542

Regular price Rs. 1,579.00
Regular price Sale price Rs. 1,579.00
Sale Sold out
Tax included.

Out of stock

WiFi ESP click carries the ESP-WROOM-02 module that integrates ESP8266EX. The click is designed to run on a 3.3V power supply. It communicates with the target microcontroller over UART interface and the following pins on the mikroBUS™ line: RST, CS.

Access point and WiFi client mode

WiFi ESP click can function in both AP (Access Point) WiFi mode, as well as in WiFi client mode. The click brings easy implementation and usage.

The module supports the following network protocols: IPv4/TCP/UDP/HTTP/FTP. Thanks to this the click can operate as a client device requesting a file from a file server device (FTP - file transfer protocol) in local network systems, or request a web page via internet (IP/TCP/HTTP). It can also be used as a small web server, for example a wireless weather station prototype, etc.

Station mode is default when the click is in WiFi client mode.

ESP-WROOM-02 module features

ESP-WROOM-02 carries ESP8266EX highly integrated Wi-Fi SoC solution to meet the continuous demands for efficient power usage, compact design and reliable performance in the industry.

Besides the Wi-Fi functionalities, ESP8266EX integrates an enhanced version of Tensilica’s L106 Diamond series 32-bit processor and on-chip SRAM. As well as antenna switches, RF balun, power amplifier, low noise receiver amplifier, filters and power management modules.

With the complete and self-contained Wi-Fi networking capabilities, it can perform as either a standalone application (WROOM module itself) or the slave to an MCU host which is the primary intention of the click board as a whole. So, this click board is applied to any microcontroller design as a Wi-Fi adaptor through UART interface (RX,TX lines on mikroBUS pin socket).

For more information see the datasheet.

Advanced usage

There are additional pad headers onboard (HSPI/GPIO interface of the module) for advanced usage.

For more information see the Documentation tab.

Specifications

Type Wi-Fi
Applications Create smart appliances, home automation systems, wireless data loggers, etc
MCU ESP-WROOM-02
Key Features Protocols: IPv4, TCP/UDP/HTTP/FTP, 802.11 b/g/n standard, UART interface, 3.3V power supply
Key Benefits The click can function in both AP mode and WiFi client mode
Interface GPIO,UART
Input Voltage 3.3V
Compatibility mikroBUS
Click board size M (42.9 x 25.4 mm)

Pinout diagram

This table shows how the pinout on WiFi ESP click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

Notes Pin Mikrobus logo.png Pin Notes
NC 1 AN PWM 16 NC
HW Reset RST 2 RST INT 15 NC
Chip enable (active high) EN 3 CS TX 14 TX UART0_TXD / Transmit end in UART download (program) mode
NC 4 SCK RX 13 RX UART0_RXD / Receive end in UART download (program) mode
NC 5 MISO SCL 12 NC
NC 6 MOSI SDA 11 NC
Power supply +3.3V 7 3.3V 5V 10 NC
Ground GND 8 GND GND 9 GND Ground

Additional pins

Name I/O Description
CLK IO HSPI_CLK / GPIO14
SDO IO HSPI_MISO / GPIO12
SDI IO HSPI_MOSI / GPIO13
CS IO HSPI_CS / GPIO15
IO0 IO GPIO0 (UART download mode - pull down, Flash boot - pull up)
GND GND

Buttons and LEDs

Designator Name Type (LED, BUTTON…) Description
LD1 PWR LED Power Supply ON

Programming

Code examples for WiFi ESP click, written for MikroElektronika hardware and compilers are available on Libstock.

Code snippet

This code snippet configures GPIO ports, initializes the display and prepares the WiFi module. In an endless loop, LED is enabled or disabled by a button, and that information is then sent to the server.

01 void main() {
02 
03 // Initialize variables
04 length = 0;
05 state = 0;
06 response_rcvd = 0;
07 responseID = 0;
08 response = 0;
09 i = 0;
10 
11 // GPIO Direction
12 GPIO_Digital_Input( &GPIOA_IDR, _GPIO_PINMASK_4 );
13 GPIO_Digital_Output( &GPIOD_BASE, _GPIO_PINMASK_13 );
14 GPIO_Digital_Output( &GPIOC_BASE, _GPIO_PINMASK_2 );
15 GPIO_Digital_Output( &GPIOA_ODR, _GPIO_PINMASK_0 );
16 
17 // UART Initialization
18 UART3_Init_Advanced( 115200, _UART_8_BIT_DATA,
19 _UART_NOPARITY,
20 _UART_ONE_STOPBIT,
21 &_GPIO_MODULE_USART3_PD89);
22 
23 // Enable Interrupts
24 RXNEIE_USART3_CR1_bit = 1;
25 NVIC_IntEnable( IVT_INT_USART3 );
26 EnableInterrupts();
27 
28 display_init();
29 
30 // Initialize WiFI module
31 WiFi_Init();
32 
33 // Setting WiFi Mode - SoftAP + station mode
34 WiFI_Configure();
35 
36 state = 100;
37 i = 0;
38 
39 TFT_Write_Text("Please connect to your STAIP...", 50, 100);
40 Delay_ms(20000);
41 WiFi3_Send();
42 TFT_Write_Text("Entering button toggling loop.", 50, 150);
43 
44 LED_switching = 1;
45 
46 while( 1 )
47 {
48 // detect logical one on PA4 pin
49 if (Button(&GPIOA_IDR, 4, 1, 1))
50 {
51 oldstate_A4 = 1;
52 }
53 // detect logical one-to-zero transition on PA4 pin
54 if (oldstate_A4 && Button(&GPIOA_IDR, 4, 1, 0))
55 {
56 if ( !strcmp(txt_state_A0, "OFF" ))
57 {
58 strncpy( txt_state_A0, "ON ", 8 );
59 GPIOA_ODR.B0 = 1;
60 }
61 else
62 {
63 strncpy( txt_state_A0, "OFF", 8 );
64 GPIOA_ODR.B0 = 0;
65 }
66 oldstate_A4 = 0;
67 A0_change = true;
68 WiFi3_Send();
69 }
70 }
71 }

View full details

Featured collection

The crazyflie is a versatile platform that is designed to engage people in learning about robotics and quadcopters.
1 of 25