🤖 Dasai Mochi – My Cute Mini OLED Robot Made With ESP32

 MINI DASAI MOCHI

Hey everyone! 👋
I recently built a cute little OLED robot using an ESP32 board and a few simple components. I call it Dasai Mochi, inspired by those adorable minimalist robot faces you see in animations — simple, expressive, and full of character!

🧠 The Idea

I wanted to make a tiny breadboard robot that can show emotions on an OLED display — eyes moving, blinking, smiling — all powered by my ESP32.
It’s simple, but the idea was to give life to something as small as a 0.96" OLED screen.

⚙️ Components Used

• ESP32 Dev Board (you can also use Arduino UNO)

• OLED Display (0.96" 128x64, I2C type)

• Push Button (on GPIO 4)

• Breadboard + Jumper Wires

• USB Cable (for power and uploading)

That’s it! No fancy modules, just some creative code.

💻 Working Concept

The OLED display shows a simple cartoon face:

• 👀 Eyes blink every few seconds.

• 👁️ They shift left and right like they’re looking around.

• 🙂 Pressing the button toggles between a smile and a neutral face.

It’s a fun way to learn about display control, animation timing, and GPIO input handling in embedded systems.

🔌 Circuit Connections

Component	ESP32 Pin	Description
OLED VCC	3.3V	Power
OLED GND	GND	Ground
OLED SCL	GPIO22	I2C Clock
OLED SDA	GPIO21	I2C Data
Push Button	GPIO4	Smile Toggle Input

🧩 Libraries Required

Make sure to install these in Arduino IDE:

• Adafruit SSD1306

• Adafruit GFX Library

(They handle the OLED display and basic graphics drawing.)

💬 Experience

This project reminded me how small details bring electronics to life.
Even a single OLED screen with a few lines of code can express emotion and personality — like a digital pet built from scratch.

Next step? Maybe make Mochi speak using a buzzer or even move using servos.

Dasai Mochi for you