2023-24 ITE S1-3

3.7 Neopixel light Patterns and Animations

• A. Learning Objectives

  • create different patterns to be shown in a NeoPixel LED matrix;
  • write a program in Wemos D1 R32 or ESP32 board to accept Bluetooth Terminal commands to select different patterns shown in a NeoPixel LED matrix;
  • use functions to make the program more structural.
• 
  

  GPIO13 <--> DIN  (Data In / Signal) 
  GND     <--> GND (0V)
  VIN       <--> VCC (5V)

• B. Notes
  B1. Use "data" for making patterns.

• Neopixel - Matrix data URL
• 
  

  In the above example, 0x _ _ is a hexadecimal number. 40₁₆ = 64, which is the number of pixels.

  0xFF0000 is the colour of the first pixel, where R=FF₁₆=255, G=00₁₆=0, B=00₁₆=0. 
  So the colour of the first pixel is red.
  

  Copy the data from "Neopixel Matrix Data" into "Set data". Check the result.
  

• Hexadecimal to Decimal converter URL
• Example 1:
  
  

  Download File

• Other examples:

  
  

• • Examples
    • ghost1.png
    • ghost2.png
    • pixilart8x8.png

  Download folder
• C. Coursework (for Term Project)

  Make a Bluetooth Neopixel LED light

  • OFF + 3 patterns
  • command = 0 : OFF
  • command = 1: pattern 1
  • command = 2: pattern 2 
  • command = 3: pattern 3 (animation)
  • one of the pattern (1-3) should be turned on when the light is just powered on.
  • Bonus 1: brightness control
  • Bonus 2: breathing effect