In this modern world where everything is digitalised, why not conventional Notice board gets a new look.
So, lets make a Bluetooth controlled Notice Board which is very simple.
This setup can be used in place of static notice board like in colleges/institutes, Hospital/clinics to denote patient serial numbers and how you may use it (DO NOT DISTURB indicator!!!).
N.B.: Please read the whole article first it will take 2-3 minutes to read it. Otherwise I will not be responsible for any damage of instruments!!
Step 1: Components Requiered
Mainly 3 components are required :
- Arduino UNO/nano/mini
- Bluetooth module (HC-05)
- LCD 16x2
The accessories are very much guessable potentiometer (that will control the contrast of LCD), jumpers/wires.
Only these are the things we will need for this project.
Step 2: Circuit Diagram
Above circuit diagram speaks it all for the sake of this project.
The LCD pins are connected to Arduino pin 12, 11, 5, 4, 3, 2 as shown in the circuit diagram now we are more than half way mark. Connect the potentiometer to the shown pin of LCD to control the contrast.
Now comes the bluetooth module and which will have its Rx,Tx pin connected with Tx,Rx pin of Arduino respectively. Battery or power adapter of 5-6V is required.
So, data sent to the bluetooth module using mobile or any bluetooth enabled devices through bluetooth terminal apps are fetched to the Arduino and in return displayed on the LCD.
Step 3: Code (Arduino)
Arduino IDE has the LCD sketch just the modification is adding the bluetooth serial input with some if- if else statements and while loop.
So the code is written in such a manner that you can notice just by going through the code once.
- # - clear LCD display
- * - set the cursor to second row i.e. (0,1)
- % - scroll left display
- ! - stops the scrolling
Now putting innovation into this one can easily make the display scroll right, may be make the text bounce within the screen to go left and right with while looping and delay function.
Step 4: Controlling Mobile App
I have used a app from google play store called "Custom bluetooth app".
- GO TO SETUP
- PRESS THE MENU DOTS
- SELECT ADD CONTROL
- SELECT SERIAL OUT
- SAVE FROM MENU
- CONNECT TO THE HC-05 BLUETOOTH MODULE
ENJOY the fun while keeping the whole setup outside the door and just changing the data appearing on the screen using a mobile app.
That can be used in different perspectives.