ESP32 board and Neopixel

ESP32 22-01-25

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Tutorial plan

1- Presentation of Neopixel

2- Necessary components to turn on neopixel by ESP32 card

3- Wiring Setup

4- Programming ESP32 with Micropython

Presentation of Neopixel

NeoPixel is a brand of addressable RGB LED products from Adafruit, commonly used in maker projects for creating colorful, programmable lighting effects. These LEDs are easy to control with microcontrollers like Arduino, Raspberry Pi, and ESP32.

How NeoPixels Work

- Data flows sequentially from one LED to the next.

- First LED processes its data, then forwards the rest.

Applications

Decorative lighting.

Wearable technology.

Art installations.

Robotics and IoT projects.

Necessary components to turn on neopixel by ESP32 card

ESP32 Development Board

Description: The ESP32 is a powerful microcontroller with Wi-Fi and Bluetooth capabilities, suitable for controlling NeoPixels due to its high processing speed and multiple GPIO pins.

NeoPixel LED

Description: Individually addressable RGB LEDs integrated with a controller chip.

Connecting Wires

Jumper wires

Description: Insulated jumper wires or soldered connections to link components.

Breadboard

Breadboard

Description: A platform for assembling the circuit.

Wiring Setup

Connect:

- Neopixels GND pin to GND pin of ESP32

- Neopixels 5V pin of Neopixels to the 3.3V pin of ESP32

- Neopixels DI pin to pin 5 of ESP32

Programming ESP32 with Micropython

You must install this library : neopixel.py

import machine, neopixel
import time
n = 8
p = 5

np = neopixel.NeoPixel(machine.Pin(p), n)

i=1
while True:
 if (i<10) :
  np[0] = (25*i, 10*i, i*10) #led 1
  np[1] = (30+i*5, 24, 153)  #led 2
  np[2] = (5*i, 20*i, 22+i*5) #led 3 
  np[3] = (17*i, 20, 100) #led 4
  np[4] = (12*i, 20*i, 0) #led 5
  np[5] = (25, 10*i, 15) #led 6
  np[6] = (12*i, 50, i*15) #led 7
  np[7] = (10*i, 15*i, i*20) #led 8
  np.write()
  i=i+1
  time.sleep(1)
 else:
  i=1