Name: SunFounder ESP32
Brand: SunFounder
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SunFounder ESP32 Starter Kit

Note:

• Open the 6.2_flowing_led.py ﬁle located in the esp32-starter-kit-main\micropython\codes path,

or copy and paste the code into Thonny. Then, click “Run Current Script” or press F5 to execute it.

• Make sure to select the “MicroPython (ESP32).COMxx” interpreter in the bottom right corner.

from machine import Pin

import neopixel

import time

import random

# Set the number of pixels for the running light

num_pixels = 8

# Set the data pin for the RGB LED strip

data_pin = Pin(14, Pin.OUT)

# Initialize the RGB LED strip object

pixels = neopixel.NeoPixel(data_pin, num_pixels)

# Initialize the avoid sensor

avoid = Pin(25, Pin.IN)

# Initialize the direction variable

direction_forward = True

# Initialize the reverse direction flag

reverse_direction = False

# Continuously loop the running light

while True:

# Read the input from the infrared sensor

avoid_value = avoid.value()

# Generate a random color for the current pixel

color = (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))

# If no obstacle is detected

if avoid_value:

for i in range(num_pixels):

# Turn on the current pixel with the random color

pixels[i] = color

# Update the RGB LED strip display

pixels.write()

# Turn off the current pixel

pixels[i] = (0, 0, 0)

time.sleep_ms(100)

(continues on next page)

414 Chapter 3. For MicroPython User

SunFounder ESP32 User Manual

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