OLED screen demo on ESP32 with MicroPython

esp32-oled-demo.py

# Pull the SDD1306 lib from here https://github.com/adafruit/micropython-adafruit-ssd1306/blob/master/ssd1306.py
from time import sleep_ms
from machine import Pin, I2C
from ssd1306 import SSD1306_I2C

buf = "wubba lubba dub dub  "

i2c = I2C(-1, Pin(4),Pin(5),freq=40000) # Bitbanged I2C bus
assert 60 in i2c.scan(), "No OLED display detected!"

oled = SSD1306_I2C(128, 64, i2c)
oled.invert(0) # White text on black background
oled.contrast(255) # Maximum contrast

for j in range(0, 500):
    oled.fill(0)
    oled.text(buf[j%len(buf):]+buf, 10, 10)
    oled.show()
    sleep_ms(40)