LedBars/RpiLedBars/README.md

RpiLedBars

LedBars version for raspberry pi

contains :

• a python test program (main.py)
• a C program using :
  • ws2812 with dma/smi from Jeremy P Bentham - https://iosoft.blog/category/neopixel/
  • artnet from Stephan Ruloff - https://github.com/rstephan/ArtnetnodeWifi

biblio:

• Art-Net
  • Protocol Spec :
    • https://art-net.org.uk/how-it-works/
    • https://artisticlicence.com/WebSiteMaster/User%20Guides/art-net.pdf
  • ESP32 library from Stephan Ruloff - https://github.com/rstephan/ArtnetnodeWifi
• ws28** rgb leds
  • ws2812 datasheet - https://cdn-shop.adafruit.com/datasheets/WS2812.pdf
  • ws2815 datasheet - https://pdf1.alldatasheet.com/datasheet-pdf/view/1134588/WORLDSEMI/WS2815B.html
  • ws2812 with dma/smi from Jeremy P Bentham :
    • ws2812 - https://iosoft.blog/2020/09/29/raspberry-pi-multi-channel-ws2812/
    • dma - https://iosoft.blog/2020/05/25/raspberry-pi-dma-programming/
    • smi - https://iosoft.blog/2020/07/16/raspberry-pi-smi/

Raspi Config :

https://makersportal.com/blog/recording-stereo-audio-on-a-raspberry-pi https://learn.adafruit.com/adafruit-i2s-mems-microphone-breakout/raspberry-pi-wiring-test

sudo apt install python3-pip sudo pip3 install --upgrade adafruit-python-shell cd /tmp sudo wget https://raw.githubusercontent.com/adafruit/Raspberry-Pi-Installer-Scripts/master/i2smic.py sudo python3 i2smic.py

plug microphone

sudo reboot arecord -l arecord -D plughw:1 -c1 -r 48000 -f S32_LE -t wav -V mono -v file.wav

Control record volume

cp res/.asoundrc ~/.asoundrc

alsa API

http://www.equalarea.com/paul/alsa-audio.html

for project

sudo apt install libasound2-dev wiringpi

for cava

sudo apt install libfftw3-dev libasound2-dev libtool automake ./autogen.sh ./configure make sudo make install

Access point

grep "Access point conf" $(find /etc -type f)