You can download the user manual from:

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Here, we will demonstrate how to use this kit to remotely collect the data detected by the ultrasonic ranging sensor and display it on the mobile phone through the Blynk APP.

Some people may think that this sensor is rarely seen in ordinary times. In fact, we often use it in apartment garage systems and smart security systems.



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

Build the circuit as below:

Here we connect the Echo to port D25, connect the Trig to port D26.

Step 1 Get your Blynk AuthToken

Step 2 Install latest Arduino IDE

Step 3 WifiEsp Library Installation

You also need to install the  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

Overhere we need to add a Labeled Value wiget to get the real time distance value. Follow the next operations:

Widget Setting 1

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

Name Column: Distance

PIN:  V4

LABEL: pin/cm

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.

Widget Setting 2

In addition, you can also add GAUGE widget or Level H widget to demonstrate the changes in the values collected by the sensor.

GAUGE widget settings:

Widget Setting 3

Level H widget settings

Now you can remotely view the value detected by the ultrasonic distance sensor through the Labeled Value widget, GAUGE widget or Level H widget, you can clearly see the changes in the values collected by the sensor

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