Testing Output

On Linux

I am using ffmpeg to test the functionality: Install snapcast and ffmpeg

sudo apt install snapclient snapserver ffmpeg

In order to prevent the following error: /tmp/snapfifo: Permission denied, I executed the following command

sudo sysctl fs.protected_fifos=0

And then I can start to play audio e.g. from a url with

ffmpeg -i http://stream.srg-ssr.ch/m/rsj/mp3_128 -f s16le -c:a pcm_s16le  /tmp/snapfifo

Stop the local snapclient

service snapclient stop

Edit snapserver

sudo nano /etc/snapserver.conf

I recommend to use Opus

# Default sample format
sampleformat = 48000:16:2

# Default transport codec
# (flac|ogg|opus|pcm)[:options]
# Type codec:? to get codec specific options
codec = opus

Restart the server for the changed settings to become active

service snapserver restart

In Arduino

• In the file SnapConfig.h in the Arduino Library Directory define your values for

  • CONFIG_SNTP_SERVER
  • CONFIG_WIFI_SSID
  • CONFIG_WIFI_PASSWORD

• Select one of the example sketches and make sure that you use the Opus Decoder

• Build and deploy your sketch

  Make sure that the ESP32 Core Debug Level is set to Warning or Error (in Arduino this is in the Tools menu and in PlatformIO this is set with -DCORE_DEBUG_LEVEL )