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In this lesson, we will show how to use OSOYOO ESP8266 wifi Shield and Arduino UNO board to work as Web Server  and show “hello world!” message in browser.

Just simply insert OSOYOO ESP8266 WiFi shield to Arduino UNO board,

use jumper cap to connect E_TX to D4 and E_RX to D5 as per following picture:

Note:If you want to use above Wifi shield on Leonardo  board instead of UNO board,  you have to remove the jumper cap between D4 and E-TX. Then use a jumper wire to connect the E-TX to D8   pin in Leonardo board. You also need to set the SoftwareSerial RX pin to D8 instead of D4 in your sketch code.

Fritzing Part file download link:

Software IDE:

Software Installation

Step A) Install latest Arduino IDE (If you have Arduino IDE version after 1.1.16, please skip this step).

Download Arduino IDE from, then install the software.

Step B)WifiESP Library is required to run OSOYOO ESP8266 shield sketch code. If you have installed this library, please skip this step.

WifiESP library can be downloaded from following link:

then in your Arduino IDE ->Sketch->Include Library->Add .ZIP Library and select the file you just downloaded, and upload it to Arduino.

Step C)Download and Edit esp8266-lesson1.ino file
Please download sketch from and unzip the file and double click esp8266-lesson1.ino file, you can edit this file in Arduino IDE.

Step D) Connect the Arduino UNO board to computer via USB cable,

Step E) Open the Arduino IDE and choose corresponding board type and port type for you project.

Step F) Arduino IDE: Click file -> click Open -> choose code “esp8266-lesson1”, load up the  sketch onto your Arduino.

In the  sketch, find   following lines:

char ssid[] = "******"; // your network SSID (name)
char pass[] = "******"; // your network password
please replace the ****** with your correct wifi SSID and password, otherwise your project can
 not connect to Internet. not connect to Internet.

After loading the sketch to Arduino , open the serial monitor in the upper-right corner of Arduino IDE

You will see following message:

From the serial monitor , you can see the IP address of your UNO board in the read circle (in above picture,

Then use your browser to visit the website, you will see following result:

Learn More about parts

No. Picture Product Name Link
1 OSOYOO basic board
2 OSOYOO Wifi shield
3 Photoresistor Sensor Module
4 Water Level Detection Sensor
5 Sound Detection Sensor Module
6 Ultrasonic sensor
7 Servo motor
8 Active Buzzer Module
9 Temperature&Humidity Sensor
10 Relay Module
11 Gas Sensor Module
12 Digital Barometric Pressure Sensor Module
13 Infrared Sensor Module
14 LED(6 x White, 6 x Red, 6 x Yellow, 6x Green)