You can download the user manual from:

Buy from US Buy from UK Buy from DE Buy from FR Buy from IT Buy from ES Buy from JP

Overhere, we will demonstrate how to use this kit to remotely collect sensor data through the Blynk APP, In this way, we can use the mobile phone to check the environmental data information at home.

In this project, we will view the Arduino button status remotely through the Blynk APP. If the button is pressed, the LED widget on the APP will be lit, otherwise it will be off. Through the same principle, we can remotely measure the state of other sensors in digital mode, such as photosensitive sensor module, flame sensor module, human infrared sensor module, etc.



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

Build the circuit as below:

LED Module – D2

Button Module – D3

Step 1 Get your Blynk AuthToken

Step 2 Install latest Arduino IDE

Step 3 Blynk Wifi Library Installation

Step 4 After installing above library, please download the code from following link, unzip it:

Step 5 After above operations are completed, connect OSOYOO MEGA2560 Board to PC with USB cable.

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

Step 6 Open Arduino IDE:  Choose corresponding board type and port type for you project .

Step 7  Arduino IDE:  Click file – Open, then choose code in the folder, load up the  sketch onto your Arduino.

Note: In the  sketch, find these lines as following:

char auth[] =”YourAuthToken”;

This is the Auth Token that you emailed yourself.(Step 1) Please check your email and copy it, then paste it inside the quotation marks.

It should look similar to this:

char auth[] = “f45626c103a94983b469637978b0c78a”;

Then find these 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.

Upload the sketch to the board. Wait until you see something like this:

Done uploading

Congratulations! You are all ready! Your hardware is now connected to the Blynk cloud!

Add a Widget

Overhere we need to add an LED wiget. Follow the next operations:

Open your project page and press the “+” button to add  the “LED” Widget.

LED Widget settings:

Name Column: You can name your widget, whatever you like.


After you finished all above operations, open the Serial Monitor and you will see the connection status. Now open the Blynk APP, press the PLAY button ““. This will switch the APP from EDIT mode to PLAY mode where you can interact with the hardware.

While in PLAY mode, you won’t be able to drag or set up new widgets, press “” and get back to EDIT mode.

When you Press/Release the button, and then you will find that the virtual LED widget on the Blynk APP will be turned on/off.

At this time, you can try to use this code to detect the status of your other environmental sensors in digital mode.

Please note: If there is a status switch on your sensor, please flip the switch to the side with the letter “D”.

If you find the device is offline, please check your code, wiring and app settings, and try again.

No. Picture Device Qty. Link
1 OSOYOO MEGA2560 Board 1 Click here to buy
2 OSOYOO MEGA-IoT Extension Board 1 Click here to buy
3 Photosensitive Sensor 1 Click here to buy
4 Temp & Hum Sensor 1 Click here to buy
5  OSOYOO Active Buzzer Module 1 Click here to buy
6 Flame Detection Sensor 1 Click here to buy
7 Fan Motor Module 1 Click here to buy
8 Micro Servo Motor 1 Click here to buy
9 RGB Module 1 Click here to buy
10 Ultrasonic Sensor 1 Click here to buy
11 PIR Motion Sensor 1 Click here to buy
12 Microphone Module 1 Click here to buy
13 1602 I2C LCD Screen 1 Click here to buy
14 RFID Module 1 Click here to buy
15 White LED Module 1 Click here to buy
16 Red LED Module 1 Click here to buy
17 Colorful Light 1 Click here to buy
18 Red Button Module 1 Click here to buy
19 Blue Button Module 1 Click here to buy
20 Philips Screwdriver 1 Click here to buy