MPU 9DOF Click

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  • MIKROE-1719
  • MIKROE-1719
WiFi3 click  is a complete self-contained WiFi solution carrying the  ESP8266...more
Product information "MPU 9DOF Click"

WiFi3 click is a complete self-contained WiFi solution carrying the ESP8266 module with a system on a chip. The click is designed to run on a 3.3V power supply only. It communicates with the target board microcontroller through the mikroBUS™ RX, TX, CS and RST lines.

ESP8266 WiFi module

The module supports standard IEEE802.11 b/g/n agreement and has an integrated TCP/IP protocol stack.

It also integrates antenna switches, an RF balun, power amplifier, low noise receive amplifier, power management modes and more.

The Standby power consumption of < 1.0mW is ideally suited for IoT projects and devices that need long battery life.

Ideally suited for IoT applications

WiFi3 click is ideally suited for IoT applications. The System on Chip offloads all the networking functions from the MCU. You can integrate it with sensors and actuators through its GPIOs and connect your things to the internet with minimum development effort.

PCB antenna

WiFi3 click features a PCB trace antenna, designed for the 2400–2483.5 MHz frequency band.


Type Wi-Fi
Applications WiFi3 click makes it very simple to connect various “things” to the internet. Whether that “thing” is a simple LED, a data logger, or or any other type of sensor or switch in a smarthome
On-board modules ESP8266
Key Features Integrated TCP/IP stack. PCB antenna
Key Benefits Additional GPIO pins for connecting external electronics. Minimal software requirements for target board
Interface UART,GPIO
Input Voltage 3.3V
Compatibility mikroBUS
Click board size M (42.9 x 25.4 mm)

Key features

  • PCB trace antenna

  • ESP8266 WiFi module
    • 802.11 b/g/n 
    • Integrated low power 32-bit MCU 
    • Integrated 10-bit ADC
    • Integrated TCP/IP protocol stack
    • Wi-Fi 2.4 GHz, support WPA/WPA2
  • Interface: RX, TX, CS, RST
  • 3.3V power supply

Pinout diagram

This table shows how the pinout on WiFi3 click corresponds to the pinout on the mikroBUS™ socket (the latter shown in the two middle columns).

NotesPinMikrobus logo.png


Not connected NC 1 AN PWM 16 NC Not connected
Reset module RST 2 RST INT 15 NC Not connected
Enable EN 3 CS TX 14 TX UART Transmit
Not connected NC 4 SCK RX 13 RX UART Receive
Not connected NC 5 MISO SCL 12 NC Not connected
Not connected NC 6 MOSI SDA 11 NC Not connected
Power supply +3.3V 7 3.3V 5V 10 NC Not connected
Ground GND 8 GND GND 9 GND Ground


Code examples for WiFi3 click, written for MikroElektronika hardware and compilers are available on Libstock.

Code snippet

The following code snippet shows the interrupt routine for receiving characters from the WiFi3 module.

01 void UART3_Interrupt() iv IVT_INT_USART3 ics ICS_AUTO
02 {
03     tmp = UART3_Read();
04     switch(tmp)
05     {
06     case LF:
07         if(data_len > 1)
08         {
09             data_ready = 1;
10         }
11         break;
12     case CR:
13         rx_buff[data_len] = 0;
14         break;
15     default:
16         rx_buff[data_len] = tmp;
17         data_len++;
18     }
19 }
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