Getting the ESP32-S3 to control the onboard Neopixel LED
Introduction
The ESP32-S3 dev board includes a single multicolor LED called a neopixel. Neopixels communicate over a special protocol that permits one control wire to set the value of the red, green, and blue components. This is accomplished via a serial pulse chain according to specific timing. Fortunately, micropython includes a neopixel library that provides the proper addressing and timing for controlling Neopixel LEDs.
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Explanation of Code
We import the three elements we will need, the Pin class from the machine library, the NeoPixel class from the neopixel library, and the time library.
from machine import Pin
from neopixel import NeoPixel
import time
We create an instance of the neopixel class, connected to pin 48. Pin 48 is pre-wired
np = NeoPixel(Pin(48), 1)
Code
from machine import Pin
from neopixel import NeoPixel
import time
np = NeoPixel(Pin(48), 1)
for n in range(12):
np[0] = (255, 0, 0)
np.write()
time.sleep(1)
np[0] = (0, 255, 0)
np.write()
time.sleep(1)
np[0] = (0, 0, 255)
np.write()
time.sleep(1)
