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September 9, 2019 17:29
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Crude oscilloscope
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| %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() | |
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Uses ESP32-WROOM + ssd1306 OLED + potentionmeter