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In this lesson, we will show you how to use motion sensor to detect human movement and how to use MEGA-IoT Shield to report the intruder status to remote computer(browser).

OSOYOO MEGA2560 Board x 1
OSOYOO MEGA-IoT extension board x 1
USB Cable x 1
Red LED PnP module x 1
Green LED PnP module x 1
Yellow LED PnP module x 1
White LED PnP module x 1
Ultrasonic distance SensorPnP module x 1
3-pin PnP cable x 4
4-pin PnP cable x 1

First, please plug OSOYOO MEGA-IoT Extension Board into MEGA2560 board:

Then connect the modules with the OSOYOO MEGA-IoT Extension Board with four 3-pin PnP cables as below:

(Jumper Cap should connect ESP8266 RX with A8, TX with A9)

White LED Module – D9

Yellow LED Module – D10

Red LED Module – D11

Green LED Module – D12

Ultrasonic distance SensorPnP module- Ultrasonic port (4-pin PnP cable)

Notice: Shut off your battery or Unplug your power adapter when upload sketch code to Arduino.

Step 1 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 2 WifiEsp Library Installation (if you have installed WifiESP library, please skip this step)

OSOYOO MEGA-IoT extension TX/RX pin to Arduino A9/A8 pin by default. So in Arduino sketch code, we need use Software Serial Port to communicate with ESP8266 (set A9 as TX and A8 as RX in softwareserial object).

To use this wifi shield in Arduino IDE, we need download?WiFiEsp-master library from following link:

Open Arduino IDE,click Sketch – Include Library- Add .Zip library to load above zip files into Arduino IDE.

Step 3 After installing above library, please download the main code from following link, unzip it, you will see a folder called “smarthome-lesson17”:

Step 4 After above operations are completed, connect OSOYOO MEGA2560 Board to PC with USB cable.

Step 5 Arduino IDE:  Choose corresponding board type and port type for you project .

Step 6 Arduino IDE:  Click file – Open, then choose code “smarthome-lesson17.ino” in the folder, load up the  sketch onto your Arduino.

Note: 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.

After loading the sketch to Arduino , open the serial monitor in the upper-right corner of Arduino IDE, you will see following result:

From the serial monitor ,  you can see the IP address of your MEGA2560 board in the read circle (in above picture,

Put some obstacle object in front of the ultrasonics sensor,  use your browser to visit the website http://mega2560-ip-address (in above case,, you will see following result:

You will see the red LED will turn on at the same time.

As you slowly move the object from ultrasonic sensor to close distance location, the LED will turn to Green, Yellow, white .

The browser will also show the similar result(but you can not move very fast, browser only update its status every 5 seconds).