009_neopixel_tutorials.md

NeoPixel

Table of Contents

• Prolog
• NeoPixel basics
• NeoPixel morse code

Prolog

I personally love controlling NeoPixel with the ESP and MicroPython. In principle, you can quickly and easily implement your `DIY projects with it. Approx. 16 million colors are possible and the possibilities are almost endless, and they look fantastic.

It doesn't matter whether you use a NeoPixel Ring, Strip or Matrix! The code should always work with the adjustment of the number.

Important: From a certain number of NeoPixels, you need an additional power supply.

NeoPixel basics

This example contains various functions to create effects with NeoPixel.

Requirements

• mandatory 1x NeoPixel (ring, strip or matrix)
• few cables
• optional a breadboard

Example

Circuit

Code

# create new subdirectory
$ mkdir -p ~/Projects/ESP/examples/neopixel

# create script
$ touch ~/Projects/ESP/examples/neopixel/neopixel_basics.py

Source Code for neopixel_basics.py

Check your circuit and copy the script to the microcontroller as main.py.

# copy file into pyboard as main.py
(venv) $ rshell -p [SERIAL-PORT] cp examples/neopixel/neopixel_basics.py /pyboard/main.py

# start repl
(venv) $ rshell -p [SERIAL-PORT] repl

Start with keys Control + d. Stop the loop with keys Control + c. To leave the REPL, press keys Control + x.

NeoPixel morse code

In this example, a string is converted into Morse code and displayed visually.

Requirements

... same as previous example ...

Circuit

... same as previous example ...

Code

# create script
$ touch ~/Projects/ESP/examples/neopixel/neopixel_morse.py

Source Code for neopixel_morse.py

Check your circuit and copy the script to the microcontroller as main.py.

# copy file into pyboard as main.py
(venv) $ rshell -p [SERIAL-PORT] cp examples/neopixel/neopixel_morse.py /pyboard/main.py

# start repl
(venv) $ rshell -p [SERIAL-PORT] repl

Start with keys Control + d. To leave the REPL, press keys Control + x.

Home | Previous | Next