How I Displayed AI Voice Commands on a 3.5-Inch Arduino TFT LCD — Step-by-Step

Project Goal

In this project, we connected AI voice commands from Python to an Arduino-powered 3.5-inch TFT LCD display. The goal was simple: speak a command, and see it live on the screen.

What We Achieved in This Step

✅ Took voice input using Python
✅ Sent the recognized command via serial to Arduino
✅ Arduino displayed the command on a 3.5-inch TFT LCD shield in real-time

Hardware Used

Arduino Uno (or Mega)
3.5-inch TFT LCD Shield (ILI9486-based)
USB cable for programming
PC with microphone
Jumper wires (optional if using shield)

Software Used

Python 3.10 with speech_recognition, pyserial, and pyaudio
Arduino IDE with MCUFRIEND_kbv and Adafruit_GFX libraries

How It Looks

When you say:

arduinoCopyEdit"Turn on fan"

The LCD shows:

vbnetCopyEditCMD:
turn on fan

Arduino Code Snippet

Here’s a short version of the core Arduino code that receives the command and prints it:

cppCopyEdit#include <MCUFRIEND_kbv.h>
#include <Adafruit_GFX.h>
#define BLACK 0x0000
#define WHITE 0xFFFF
#define GREEN 0x07E0
#define YELLOW 0xFFE0

tft.fillScreen(BLACK);
tft.setTextColor(GREEN);
tft.setCursor(30, 80);
tft.print("CMD:");

tft.setCursor(30, 130);
tft.setTextColor(YELLOW);
tft.print(incomingCommand);

Why This Is Powerful

Can be used for IoT device interfaces
Great for AI + Hardware integration
A visual dashboard you can expand with touch, graphs, or buttons

What’s Next?

In the next step, we’ll:

Add a relay module
Use voice to actually turn ON/OFF a real fan or light

Stay tuned!