internet-radio & 🔵🦷-box

	2021-08-29 / 2025-07-23

RPi + Altes Radio = Internet Radio (mit Bewegungsmelder) und Bluetooth-Box

GPIO-Belegung

Module Installieren

sudo apt install mpd mpc alsa-utils bluez-tools bluez-alsa-utils

Default Sound-Karte

sudo tee /etc/asound.conf >/dev/null <<'EOF'
pcm.!default {
  type asym
  playback.pcm {
    type plug
    slave.pcm "output"
  }
  capture.pcm {
    type plug
    slave.pcm "input"
  }
}

pcm.output {
  type hw
  card 1
}

ctl.!default {
  type hw
  card 1
}
EOF

Berechtigungen

sudo chmod -R 775 /var/lib/mpd/playlists
sudo chown -R root:staff /usr/local
sudo chmod -R 775 /usr/local

sudo usermod -aG audio mani
sudo usermod -aG gpio mani
sudo usermod -aG staff mani
sudo usermod -aG audio www-data
sudo usermod -aG gpio www-data
#reboot!

apache2 & php.ini & https

Python-Script + Webseite installieren

mnt-bb8
# m~radio.de nach /var/www/html kopieren
# python-scripte nach /usr/local/bin/ kopieren
umntt

Berechtigungen
sudo chown -R www-data:www-data /var/www/html
sudo chmod -R 775 /var/www/html

Radio - Audioausgabe

sudo nano /etc/mpd.conf
#strg+w: output
    audio_output {
            type            "alsa"
            name            "My ALSA Device"
    ##      device          "hw:1,0"        # optional <- muss das noch?
            mixer_type      "software"      # optional
    ##      mixer_type      "hardware"      # optional
    ##      mixer_device    "default"       # optional
    ##      mixer_control   "PCM"           # optional
    ##      mixer_index     "0"             # optional
    }

sudo systemctl enable mpd.service
sudo systemctl start mpd.service
sudo systemctl status mpd.service

Radio - Test

tee /var/lib/mpd/playlists/radio.m3u >/dev/null <<'EOF'
http://mp3channels.webradio.antenne.de:80/antenne
EOF
mpc load radio
mpc play

Radio - Dienst

sudo tee /etc/systemd/system/radio.service >/dev/null <<'EOF'
[Unit]
Description=radio
After=syslog.target
After=network.target

[Service]
User=www-data
Restart=always
WorkingDirectory=/tmp
ExecStart=python /usr/local/bin/Radio.py

[Install]
WantedBy=multi-user.target
EOF

sudo chmod 755 /etc/systemd/system/radio.service

sudo systemctl enable radio.service
sudo systemctl start radio.service
sudo systemctl status radio.service

🔵🦷 - Settings

sudo tee /etc/bluetooth/main.conf >/dev/null <<'EOF'
[General]
Class = 0x200414
DiscoverableTimeout = 0

[Policy]
AutoEnable=true
EOF

🔵🦷 - Dienst

sudo tee /etc/systemd/system/bt-box-agent.service >/dev/null <<'EOF'
[Unit]
Description=Bluetooth Agent
Requires=bluetooth.service
After=bluetooth.service

[Service]
ExecStartPre=/usr/bin/bluetoothctl discoverable on
ExecStartPre=/bin/hciconfig %I piscan
ExecStartPre=/bin/hciconfig %I sspmode 1
ExecStart=/usr/bin/bt-agent --capability=NoInputNoOutput
RestartSec=5
Restart=always
KillSignal=SIGUSR1

[Install]
WantedBy=multi-user.target
EOF

sudo chmod 755 /etc/systemd/system/bt-box-agent.service

sudo systemctl enable bt-box-agent.service
sudo systemctl start bt-box-agent.service
sudo systemctl status bt-box-agent.service

Radio - Troubleshooting

GPIO.add_event_detect(motionDetector, GPIO.RISING, callback=motionDetected) 
   RuntimeError: Failed to add edge detection

sudo apt remove python3-rpi.gpio
sudo apt install python3-rpi-lgpio

Sound Änderungen müssen auf korrekter Soundkarte ausgeführt werden

Ist aber ggf. Hinfällig mit dem globalen setzen der Soundkarte.

cat /proc/asound/cards 

amixer -c 1 sset PCM 10%

Grundlautstärke regeln

alsamixer

mpc Befehle

mpc clear
mpc load 
mpc play
mpc play 
mpc volume 80
mpc next
mpc prev
mpc current
mpc pause
mpc stop
mpc toggle

amixer notes

cat /proc/asound/cards 

amixer scontrols

amixer sset PCM 100%
amixer sset PCM 40%

# increase by 3%
amixer -q sset PCM 3%+

# decrease by 3%
amixer -q sset PCM 3%-

# mute/unmute
amixer -q sset PCM toggle

Linksammlung

https://www.blog.berrybase.de/blog/2020/10/12/bau-dir-deinen-eigenen-bluetooth-lautsprecher-mit-dem-raspberry-pi/
https://github.com/nicokaiser/rpi-audio-receiver.git