{"id":5932,"date":"2023-11-03T09:08:03","date_gmt":"2023-11-03T08:08:03","guid":{"rendered":"https:\/\/www.pschatzmann.ch\/home\/?p=5932"},"modified":"2024-03-21T07:50:58","modified_gmt":"2024-03-21T06:50:58","slug":"arduino-audio-tools-a-snapcast-client-for-arduino","status":"publish","type":"post","link":"https:\/\/www.pschatzmann.ch\/home\/2023\/11\/03\/arduino-audio-tools-a-snapcast-client-for-arduino\/","title":{"rendered":"Arduino Audio Tools – A Snapcast Client for Arduino"},"content":{"rendered":"

Snapcast<\/strong><\/a> is a multiroom client-server audio player<\/strong>, where all clients are time synchronized<\/strong> with the server to play perfectly synced audio. It’s not a standalone player, but an extension that turns your existing audio player into a Sonos-like multiroom solution.<\/p>\n

This week I have spent some time to work a new client for Arduino<\/a> that should integrate with my AudioTools<\/a> and I have a first DRAFT version<\/strong> that started to work.<\/p>\n

Arduino Sketch<\/h3>\n

Here is the related Arduino Sketch that I have tested with an ESP32<\/strong>:<\/p>\n

#include \"AudioCodecs\/CodecOpus.h\"\n#include \"AudioTools.h\"\n#include \"SnapClient.h\"\n\n#define ARDUINO_LOOP_STACK_SIZE (10 * 1024)\n\nOpusAudioDecoder opus;\nI2SStream out;\nSnapClient client(out, opus);\n\nvoid setup() {\n  Serial.begin(115200);\n  \/\/ login to wifi\n  WiFi.begin(CONFIG_WIFI_SSID, CONFIG_WIFI_PASSWORD);\n  Serial.print(\"Connecting to WiFi ..\");\n  while (WiFi.status() != WL_CONNECTED) {\n    Serial.print('.');\n    delay(1000);\n  }\n\n  \/\/ print ip address\n  Serial.println();\n  Serial.println(WiFi.localIP());\n\n  \/\/ setup I2S to define custom pins\n  auto cfg = out.defaultConfig();\n  config.pin_bck = 14;\n  config.pin_ws = 15;\n  config.pin_data = 22;\n  out.begin(cfg);\n\n  \/\/ start snap client\n  client.begin();\n}\n\nvoid loop() { client.doLoop(); }\n\n<\/code><\/pre>\n
So we just need to pass the decoder and the output stream as argments to the constructor<\/strong> of the SnapClient object, start the Wifi<\/strong> and the client<\/strong> and call doLoop() in the Arduino loop!<\/p>\n
To test it out I was executing the following command on my Linux Desktop:  ffmpeg -i http:\/\/stream.srg-ssr.ch\/m\/rsj\/mp3_128 -f s16le -ar 48000  \/tmp\/snapfifo<\/code>!<\/p>\n
For further information please read the documentation in the project<\/a>.<\/p>\n
Open Topics<\/h3>\n
There are still a couple of additional things to do<\/strong>:<\/p>\n