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Smart House IoT UDP WIFI APP Lesson 2-2: Get remote LED status

Post Time: 2022-02-22 18:02:50 Category: Smart Home V2.0 UDP APP control

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In this project, we will use a push button to control LED through MEGA2560 Board. Furthermore, we will also use OSOYOO IoT APP to read the LED On/Off status and control the LED through UDP protocol.



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

Build the circuit as below:

LED Module – D2

Button Module – D3


Download and run the lesson2-2 Arduino code
Step 1)
Download the code from following link, unzip it:

Step 2) 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 3 Open Arduino IDE:  Choose corresponding board type and port type for your project.

Step 4 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 26 as following:

Then find the following lines and replace your Wi-Fi ssid/password

char ssid[] = "***";//replace this line with your wifi ssid
char pass[] = "***"; //replace this line with your wifi password

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

Done uploading
Now open Serial monitor in the upper right corner, you should see your Arduino IP address and Port number as following:

APP Installation and Setting:
Step 1) If you haven’t installed OSOYOO IoT Robot APP, please search OSOYOO IoT Robot Car APP in Google Play or Apple Store to install this APP.
You read following tutorial link for more information about APP install :

Step 2):Make sure your Cell phone is in the same Local Network of Arduino. Open the APP, click Settings, enter your Arduino IP address from Step F and Port to 8888 in settings:

The button in D3 port is a toggle, press once, LED in D2 port will turn on. Press the button again, the LED will be turned off.
Also, you can press F1 key in APP to turn on LED in D2 port, Press F2 to turn off LED.

Press any key in the APP, you will see the current LED status in the APP as the following picture:


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

DownLoad Url osoyoo.com

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