🖥️ ESP8266 OLED Display (SSD1306 I²C) — MicroPython

🧠 Overview

This project demonstrates how to interface an SSD1306 OLED Display (128x64) with the ESP8266 using I²C communication in MicroPython.
The example introduces a reusable function oled_string() for displaying dynamic text messages on the OLED.

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⚙️ Hardware Setup

Component	ESP8266 Pin	Description
OLED (SCL)	GPIO5 (D1)	Serial Clock Line
OLED (SDA)	GPIO4 (D2)	Serial Data Line
VCC	3.3V	Power supply
GND	GND	Common ground

🪛 Connections:

• D1 (GPIO5) → SCL
• D2 (GPIO4) → SDA
• 3.3V → VCC
• GND → GND

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🧩 Code

from machine import Pin
from machine import I2C
import ssd1306

# D1 = SCL = GPIO5
# D2 = SDA = GPIO4

i2c = I2C(sda=Pin(4), scl=Pin(5))
display = ssd1306.SSD1306_I2C(128, 64, i2c)

def oled_string(x, y, z, c):
    display.fill(0)  # Clear display
    display.text(x, y, z, c)
    display.show()

oled_string('OLED Display', 20, 32, 1)