Use NeoPixel on Raspberry Pi

I should have been able to use the full color serial LED NeoPixel (ws2812B) on the Raspberry Pi 3B before. I've stumbled after switching to Raspbian (Buster), so make a note of it.

wiring

https://learn.adafruit.com/neopixels-on-raspberry-pi/raspberry-pi-wiring Raspberry Pi has a 3.3V signal, Neopixel has a 5V signal How to use 74AHCT125 level converter and how to use diode are introduced. Try using a diode. The signal line is GPIO18 (PWM0) ** Do not power more than a few Neo Pixels from the 5V output of the Raspberry Pi ** If you don't protect it, it will break (broken)

Raspberry Pi library

https://github.com/jgarff/rpi_ws281x Userspace Raspberry Pi PWM library for WS281X LEDs

git clone https://github.com/jgarff/rpi_ws281x Installed because it requires scons (it seems to be a substitute for make) sudo apt-get install scons cd rpi_ws281x scons

~~ should be fine ~~ ~~ An error occurred if ‘makedev’ was not defined ~~ ~~://www.raspberrypi.org/forums/viewtopic.php?t=250220~~

Edit ~~ mailbox.c and add ** \ #include \ <sys / sysmacros.h> ** ~~ ~~nano mailbox.c~~ ~~ again ~~ ~~ scons ~~ (not needed) success!

python library

https://github.com/rpi-ws281x/rpi-ws281x-python Python library wrapping for the rpi-ws281x library sudo pip3 install rpi_ws281x git clone https://github.com/rpi-ws281x/rpi-ws281x-python cd rpi-ws281x-python/example chmod 755 *.py sudo python3 strandtest.py Success! (Requires sudo)

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