Speech Recognition With Arduino (Bluetooth + LCD + Android)

In this project, we are going to do speech recognition with Arduino, Bluetooth module (HC-05) and LCD.

let`s build your own speech recognition device.

Step 1: Watch the Video

Step 2: Components

Components:

• Arduino UNO
• HC-05 Serial Bluetooth Module
• LCD 16*2
• 1x 1K POT
• 1x 1K ohm resistor
• 1x 2.2K ohm resistor
• Wires
• Jumpers

Step 3: Connect to Arduino

Connect LCD with Arduino

1. VSS to ground
2. VCC to +5V
3. VEE to potentiometer
4. RS to pin 2 in arduino
5. RW to ground
6. E to pin 3 in arduino
7. D4 to pin 4 in arduino
8. D5 to pin 5 in arduino
9. D6 to pin 6 in arduino
10. D7 to pin 7 in arduino
11. A to +5V
12. K to ground

connect HC-05 to arduino

• tx with rx in arduino (note: don`t connect tx while uploading the code)
• rx with resistors and then connect to tx in arduino (note:don`t connect rx while uploading the code)
• +5V to +5V
• GND to ground

Step 4: Programming the Arduino

first you need to download LCD library from here

note: don`t connect tx and rx when uploading the code

CODE:

Step 5: Download the Application

Download the free App here: Arduino Voice Control

Steps:

1. Download the app from Google PlayStore
2. Tap on Connect button
3. Click on your bluetooth module (in my case it`s the HC-05)
4. Wait until it says connected to bluetooth module (HC-05)
5. Tap on the mic icon and state your command

Step 6: Problems Are Solved

• if LCD doesn`t display anything, adjust the value of POT (variable resistor)
• if code doesn`t upload, don`t connect Tx and Rx in Arduino

Comments

[bogdanbogdy9]

hi ,why the text don t go to the second line on the display?

[annapurna.190594]

Can I get the total code

[EslamG11]

Sure. Just click on download button there in step 4 as shown in the below screenshot. Sorry for replying late.

[zmraazra]

may i ask ? why i cant download code ? it told me to create a file but it doesnt work at all

[EslamG11]

Yes, when you download the code file, Arduino IDE asks you to create a file.
You must create a file and then click on verify icon on Arduino IDE and it will done compiling and ready to upload on Arduino board.
Hope that helps.

[Malak Elfeky]

What is the use of the Potentiometer?

[EslamG11]

To adjust the contrast of LCD. By adjusting it, you can see the text on LCD.

[agis68]

this a really clever and usefull in many ways project. Thanks...

[audreyobscura]

I could see this being helpful in a lot of different ways!

[EslamG11]

Thank you!. this project can be used in a lot of applications such as a communication between two rooms at home.