from machine import Pin, SoftI2C
import ssd1306
from time import sleep
# ESP32 Pin assignment
i2c = SoftI2C(scl=Pin(21), sda=Pin(22))
# ESP8266 Pin assignment
#i2c = SoftI2C(scl=Pin(5), sda=Pin(4))
oled_width = 128
oled_height = 64
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)
oled.text('Hello, World 1!', 0, 0)
oled.text('Hello, World 2!', 0, 10)
oled.text('Hello, World 3!', 0, 20)
oled.show()
sleep(1)
a=0
while True:
    a+=1
    oled.fill(0)
    oled.text(str(a), 0, 0)
    oled.show()
    sleep(1)