You can download the user manual from:

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In this lesson, we will use this IoT kit to remotely monitor the home environmental temperature and humidity, and display the data to the Blynk APP.



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

Build the circuit as below:

Here we connect the signal pin (S) to digital pin D5.

Step 1 Get your Blynk AuthToken

Step 2 Install latest Arduino IDE

Step 3 WifiEsp Library Installation

To use the DHT11 sensor here, you also need to install the DHT11 library, Adafruit library and I2C library as above operations.

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

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

Widget settings:

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

PIN  V5, value: H
PIN  V6, value: T

Here, you can try to change the LCD Widget to Labeled Value Widget by yourself, so that you can add the symbols of the corresponding data, but you need more Blynk energy.

After you finished all above operations, press the “ button. This will switch you 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.

Now, you can see the temperature and humidity remotely!

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