Crude oscilloscope

oscillo.py

%serialconnect to --port=/dev/ttyUSB1 # for Jupyter

import machine, ssd1306
i2c = machine.I2C(-1, scl=machine.Pin(22), sda=machine.Pin(21))
oled = ssd1306.SSD1306_I2C(128, 64, i2c)
oled.fill(0) 
oled.text('MicroPython on', 0, 0)
oled.text('attached SSD1306', 0, 20)
oled.text('OLED display', 0, 30)
oled.show()

from machine import Pin, ADC
from time import sleep

pot = ADC(Pin(34))
pot.atten(ADC.ATTN_11DB)       #Full range: 3.3v

def naff():
    while True:
        pot_value = pot.read()
        print(pot_value)
        sleep(0.1)

print(pot.read())

oled.fill(0)
y = pot.read()
print(y)
y = 63-int((y* 63)/4095)
print(y)
oled.pixel(0,y, 1)
oled.show()


ys = [63] *128
oled.fill(0)
while True:
    #oled.fill(0)
    y = pot.read()
    #print(y)
    y = 63-int((y* 63)/4095)
    #print(y)
    ys[127] = y
    for x in range(0, 127):
        oled.pixel(x,ys[x],0)
        ys[x] = ys[x+1]
        oled.pixel(x,ys[x], 1)
    oled.show()

Uses ESP32-WROOM + ssd1306 OLED + potentionmeter