Micropython Demonstration of using an ESP8266 with integrated SSD1306

micropython-ssd1306-demo.py

# -*- coding: utf-8 -*-
# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4 syn=python

# quick demo of displaying text on an esp8266 with integrated SSD1306
# OLED such as this: https://smile.amazon.com/gp/product/B076JDVRLP

from machine import Pin, I2C
from ssd1306 import SSD1306_I2C
from random import getrandbits

# The pretty wiring guide is not accurate,
# these values come from the schematic
sda=4
scl=5
rst=16

# this doesn't seem necessary on my board, but the
# datasheet says that this reset may be required
p_rst = Pin(rst, Pin.OUT)
p_rst.off()
p_rst.on()

bus = I2C(sda=Pin(sda), scl=Pin(scl))
print("i2c devices:", bus.scan())

oled = SSD1306_I2C(128, 32, bus)

l = list(range(0, 31, 8))
fmt="0x{:08x}"
while True:
	oled.fill(0)
	oled.text("EHLO micropython", 0, l[0])
	oled.text(fmt.format(getrandbits(32)), 0, l[1])
	oled.text(fmt.format(getrandbits(32)), 0, l[2])
	oled.text(fmt.format(getrandbits(32)), 0, l[3])
	oled.show()