In this lesson we will learn how to use this kit to make a smart light. In the dark night, the smart light will turn on when it detects human movement. During the day or no human activity is detected at night, the light will automatically turn off. Of course, you can also use your mobile phone to control the smart light.
First, please plug OSOYOO MEGA-IoT Extension Board into MEGA2560 board:
Build the circuit as below:
PIR sensor — D6 ,
light detect sensor —A0 port,
LED Module — D8 port.
Note: Make sure the light sensor is on “A” mode(A for Analog, flip the switch on the sensor module to the letter “A” side).
Prerequisite:
You need to install Local Blynk Server, Blynk APP, Arduino IDE, Blynk Libraries before running the code of this lesson. If you haven’t done these installations, please read following contents in lesson2-1 link:
Note: In the sketch, find these code in line 13,14 as following:
char auth[] =”0ByWpc50cmOJ5O6OyHMaK4OSHkDvUeI-”;
char server_ip[]=”192.168.1.81″; // replace this line with your Blynk Server IP addres;
Replace 0ByWpc50cmOJ5O6OyHMaK4OSHkDvUeI- with your local Blynk Token.
Replace 192.168.1.81 with your local Blynk Server LAN IP address.
If you don’t know how to get token and Server IP address, read this article.
In lines 17,18 and replace *** with your wifi ssid/password
char ssid[] = "***";//replace this line with your wifi ssid
char pass[] = "***"; //replace this line with your wifi 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
Now open your Serial Monitor, you will see Arduino is trying to talk to Blynk server. After 20 to 30 seconds, your Serial monitor will finally shows Arduino’s IP address and a “Ready (ping: 25ms)” ending message.
Congratulations! You are all ready! Your hardware is now connected to the Blynk server.
Add a Widget in Blynk legacy APP
Open your project page and press the “+” button to add the “Button” Widget.
Button Widget settings:
Name Column: You can name your button widget, whatever you like.
OUTPUT: D8 | 0-1
MODE: We choose the Switch mode here.
You can modify other options according to your own habits or keep them as default.
The most important parameter to set is PIN . Choose “D8 : 0~1; SWITCH Mode”
Then back to the project page. and press the “▷” button to start your project.
When the value from light sensor is low, the smart light will turn on when it detects human movement. Otherwise, the smart light will automatically turn off.
Of course, you can also use your Blynk APP to control the night light.
If you find the device is offline, please check your code, wiring and app settings, and try again.
