manual_installation.md

Install Raspberry Pi OS Lite on your SD card.

If you are not able to connect your monitor, mouse and keyboard to RPi you can connect to it using SSH over Wi-Fi

Run installation script:

sudo bash -c "$(curl -fsSL https://raw.githubusercontent.com/onlaj/Piano-LED-Visualizer/master/autoinstall.sh)"

or follow those steps:

1. Updating OS

After succesfully booting RPi (and connecting to it by SSH if necessary) we need to make sure that everything is up to date.

• sudo apt-get update
• sudo apt-get upgrade //it will take a while, go grab a coffee

2. Creating autoconnect script

You can skip this part if you don't plan to connect any MIDI device other than a piano.

• Create connectall.py file

sudo nano /usr/local/bin/connectall.py

• paste the script:

#!/usr/bin/python3
import subprocess

ports = subprocess.check_output(["aconnect", "-i", "-l"], text=True)
port_list = []
client = "0"
for line in str(ports).splitlines():
    if line.startswith("client "):
        client = line[7:].split(":",2)[0]
        if client == "0" or "Through" in line:
            client = "0"
    else:
        if client == "0" or line.startswith('\t'):
            continue
        port = line.split()[0]
        port_list.append(client+":"+port)
for source in port_list:
    for target in port_list:
        if source != target:
            #print("aconnect %s %s" % (source, target))
            subprocess.call("aconnect %s %s" % (source, target), shell=True)

Press CTRL + O to save file, confirm with enter and CTRL + X to exit editor.

• Change permissions:

  sudo chmod +x /usr/local/bin/connectall.py

• Make the script launch on USB connect:

  sudo nano /etc/udev/rules.d/33-midiusb.rules

• Paste and save:

  ACTION=="add|remove", SUBSYSTEM=="usb", DRIVER=="usb", RUN+="/usr/local/bin/connectall.py"

• Reload services:

  sudo udevadm control --reload

  sudo service udev restart

• Open file

  sudo nano /lib/systemd/system/midi.service

• Paste and save:

[Unit]
Description=Initial USB MIDI connect

[Service]
ExecStart=/usr/local/bin/connectall.py

[Install]
WantedBy=multi-user.target

• Reload daemon and enable service:

  sudo systemctl daemon-reload

  sudo systemctl enable midi.service

  sudo systemctl start midi.service

3. Enabling SPI interface

• Here you can find instruction: Enable SPI Interface on the Raspberry Pi

4. Installing packages //ready for another cup?

sudo apt-get install -y ruby git python3-pip autotools-dev libtool autoconf libasound2-dev libusb-dev libdbus-1-dev libglib2.0-dev libudev-dev libical-dev libreadline-dev python-dev libatlas-base-dev libopenjp2-7 libtiff5 libjack0 libjack-dev libasound2-dev fonts-freefont-ttf gcc make build-essential python-dev git scons swig libavahi-client3 abcmidi dnsmasq hostapd

5. Disabling audio output

sudo nano /etc/modprobe.d/snd-blacklist.conf

• paste and save:

  blacklist snd_bcm2835

• And one more file:

  sudo nano /boot/config.txt

• Change dtparam=audio=on to #dtparam=audio=on

• Reboot RPi

sudo reboot

6. Installing RTP-midi server (optional)

This part is not needed if you're not going to connect your RPi to PC.

We are going to use RTP MIDI User Space Driver Daemon for Linux

• Navigate to /home folder:

cd /home/

• Download deb package:

sudo wget https://github.com/davidmoreno/rtpmidid/releases/download/v21.11/rtpmidid_21.11_armhf.deb

• Install package

sudo dpkg -i rtpmidid_21.11_armhf.deb

7. Creating Hot-Spot

based on https://github.com/schollz/raspberry-pi-turnkey

echo -e "auto wlan0\niface wlan0 inet manual\nwpa-conf /etc/wpa_supplicant/wpa_supplicant.conf" | sudo tee -a /etc/network/interfaces > /dev/null

sudo systemctl stop dnsmasq && sudo systemctl stop hostapd

echo 'interface wlan0 static ip_address=192.168.4.1/24' | sudo tee --append /etc/dhcpcd.conf

sudo mv /etc/dnsmasq.conf /etc/dnsmasq.conf.orig

sudo systemctl daemon-reload

sudo systemctl restart dhcpcd

echo 'interface=wlan0 dhcp-range=192.168.4.2,192.168.4.20,255.255.255.0,24h' | sudo tee --append /etc/dnsmasq.conf

echo 'interface=wlan0 driver=nl80211 ssid=PianoLEDVisualizer hw_mode=g channel=7 wmm_enabled=0 macaddr_acl=0 auth_algs=1 ignore_broadcast_ssid=0 wpa=2 wpa_passphrase=visualizer wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP rsn_pairwise=CCMP' | sudo tee --append /etc/hostapd/hostapd.conf

echo 'DAEMON_CONF="/etc/hostapd/hostapd.conf"' | sudo tee --append /etc/default/hostapd

echo ' auto wlan0 iface wlan0 inet manual wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf' | sudo tee --append /etc/network/interfaces

sudo systemctl start hostapd && sudo systemctl start dnsmasq

8. Installing Piano-LED-Visualizer

• Navigate to /home folder:

cd /home/

• GIT clone repository

sudo git clone https://github.com/onlaj/Piano-LED-Visualizer

cd Piano-LED-Visualizer

• Install required libraries

sudo pip3 install -r requirements.txt

• Enable autologin on boot

sudo raspi-config

Select "System options" then “Boot / Auto Login” then “Console Autologin”

• Enable autostart script on boot:

sudo nano /lib/systemd/system/visualizer.service

Paste and save:

[Unit]
Description=Piano LED Visualizer
After=network-online.target
Wants=network-online.target

[Install]
WantedBy=multi-user.target

[Service]
ExecStart=sudo python3 /home/Piano-LED-Visualizer/visualizer.py
Restart=always
Type=simple
User=pi
Group=pi

If you are using WaveShare 1.3inch 240x240 LED Hat instead of 1.44inch 128x128, edit accordingly: ExecStart=sudo python3 /home/Piano-LED-Visualizer/visualizer.py --display 1in3

If you want to use your RPi upside down add --rotatescreen true :

ExecStart=sudo python3 /home/Piano-LED-Visualizer/visualizer.py --rotatescreen true

• Reload daemon and enable service:

  sudo systemctl daemon-reload

  sudo systemctl enable visualizer.service

  sudo systemctl start visualizer.service

• Change permissions:

  sudo chmod a+rwxX -R /home/Piano-LED-Visualizer/

Now you can type sudo reboot to test if everything works. After 1-3 minutes you should see Visualizer menu on RPi screen.