{"id":99,"date":"2021-04-05T08:10:26","date_gmt":"2021-04-05T06:10:26","guid":{"rendered":"https:\/\/blog.walliczek.de\/?p=99"},"modified":"2021-05-02T10:58:26","modified_gmt":"2021-05-02T08:58:26","slug":"musik-soundwiedergabe-mit-dem-esp-8266","status":"publish","type":"post","link":"https:\/\/blog.walliczek.de\/index.php\/2021\/04\/05\/musik-soundwiedergabe-mit-dem-esp-8266\/","title":{"rendered":"Musik \/ Soundwiedergabe mit dem ESP 8266"},"content":{"rendered":"\n<p>In Kombination mit dem MAX98357A Verst\u00e4rkerchip (<a rel=\"noreferrer noopener\" href=\"https:\/\/datasheets.maximintegrated.com\/en\/ds\/MAX98357A-MAX98357B.pdf\" data-type=\"URL\" data-id=\"https:\/\/datasheets.maximintegrated.com\/en\/ds\/MAX98357A-MAX98357B.pdf\" target=\"_blank\">Datenblatt<\/a>) kann der ESP 8266 in Kombination mit entsprechenden MP3 Software-Bibliotheken zur Musik \/ Soundwiedergabe z.B. per WLAN-Streaming genutzt werden.<\/p>\n\n\n\n<p>Aufgrund des geringen Speichers klappt das nur bei niederigen Bit-Raten (z.B. 128 kBit\/s) und einem stabilen WLAN gut, ansonsten kommt es zu Aussetzern. Alternativ kann in diesem Fall der ESP32 oder ein zus\u00e4tzlicher SPI-Speicher (z.B. ) genutzt werden.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hardware<\/h2>\n\n\n\n<ul><li><a href=\"https:\/\/amzn.to\/39xohZ1\" target=\"_blank\" rel=\"noreferrer noopener sponsored nofollow\">Wemos D1 Mini 8266<\/a> (*)<\/li><li><a href=\"https:\/\/amzn.to\/2OjSnHS\" target=\"_blank\" rel=\"noreferrer noopener sponsored nofollow\">MAX98357A Verst\u00e4rker<\/a> (*)<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Schaltung<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" loading=\"lazy\" width=\"672\" height=\"534\" src=\"https:\/\/blog.walliczek.de\/wp-content\/uploads\/2021\/04\/max98357a.png\" alt=\"\" class=\"wp-image-105\" srcset=\"https:\/\/blog.walliczek.de\/wp-content\/uploads\/2021\/04\/max98357a.png 672w, https:\/\/blog.walliczek.de\/wp-content\/uploads\/2021\/04\/max98357a-300x238.png 300w, https:\/\/blog.walliczek.de\/wp-content\/uploads\/2021\/04\/max98357a-480x381.png 480w\" sizes=\"(max-width: 672px) 100vw, 672px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Code<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ Based on https:\/\/github.com\/earlephilhower\/ESP8266Audio\/blob\/master\/examples\/StreamMP3FromHTTP\/StreamMP3FromHTTP.ino\n\n#include &lt;ESP8266WiFi.h&gt;\n#include \"AudioOutputI2S.h\"\n#include \"AudioFileSourceHTTPStream.h\"\n#include \"AudioFileSourceBuffer.h\"\n#include \"AudioGeneratorMP3.h\"\n\nconst char* ssid = \"example\";\nconst char* password =  \"password\";\n\nAudioGeneratorMP3 *mp3;\nAudioFileSourceHTTPStream *file;\nAudioFileSourceBuffer *buff;\nAudioOutputI2S *out;\n\n\/\/ Called when there's a warning or error (like a buffer underflow or decode hiccup)\nvoid StatusCallback(void *cbData, int code, const char *string)\n{\n  const char *ptr = reinterpret_cast&lt;const char *&gt;(cbData);\n  \/\/ Note that the string may be in PROGMEM, so copy it to RAM for printf\n  char s1&#91;64];\n  strncpy_P(s1, string, sizeof(s1));\n  s1&#91;sizeof(s1)-1]=0;\n  Serial.printf(\"STATUS(%s) '%d' = '%s'\\n\", ptr, code, s1);\n  Serial.flush();\n}\n\nfloat gain = 0.1;\n\nvoid setup() {\n  Serial.begin(115200);\n  delay(1000);\n  Serial.println(\"Connecting to WiFi\");\n  WiFi.begin(ssid, password);\n    \n  \/\/ Try forever\n  while (WiFi.status() != WL_CONNECTED) {\n    Serial.println(\"...Connecting to WiFi\");\n    delay(1000);\n  }\n  Serial.println(\"Connected\");\n\n  audioLogger = &amp;Serial;\n  file = new AudioFileSourceHTTPStream(\"http:\/\/example.com\/sample.mp3\");\n  buff = new AudioFileSourceBuffer(file, 10000);\n  buff-&gt;RegisterStatusCB(StatusCallback, (void*)\"buffer\");\n  out = new AudioOutputI2S();\n  out-&gt;SetGain(gain);\n  mp3 = new AudioGeneratorMP3();\n  mp3-&gt;RegisterStatusCB(StatusCallback, (void*)\"mp3\");\n  mp3-&gt;begin(buff, out);\n}\n\nvoid loop()\n{\n  static int lastms = 0;\n\n  if (mp3-&gt;isRunning()) {\n    if (millis()-lastms &gt; 1000) {\n      lastms = millis();\n      Serial.printf(\"Running for %d ms... gain %f\\n\", lastms, gain);\n      Serial.flush();\n    }\n    if (!mp3-&gt;loop()) mp3-&gt;stop();\n  } else {\n    Serial.printf(\"MP3 done\\n\");\n    delay(1000);\n  }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>In Kombination mit dem MAX98357A Verst\u00e4rkerchip (Datenblatt) kann der ESP 8266 in Kombination mit entsprechenden MP3 Software-Bibliotheken zur Musik \/ Soundwiedergabe z.B. per WLAN-Streaming genutzt werden. Aufgrund des geringen Speichers klappt das nur bei niederigen Bit-Raten (z.B. 128 kBit\/s) und einem stabilen WLAN gut, ansonsten kommt es zu Aussetzern. Alternativ kann in diesem Fall der [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":105,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[15,16],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Musik \/ Soundwiedergabe mit dem ESP 8266 - Matthias&#039; Technik-Ecke<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.walliczek.de\/index.php\/2021\/04\/05\/musik-soundwiedergabe-mit-dem-esp-8266\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Musik \/ Soundwiedergabe mit dem ESP 8266 - Matthias&#039; Technik-Ecke\" \/>\n<meta property=\"og:description\" content=\"In Kombination mit dem MAX98357A Verst\u00e4rkerchip (Datenblatt) kann der ESP 8266 in Kombination mit entsprechenden MP3 Software-Bibliotheken zur Musik \/ Soundwiedergabe z.B. per WLAN-Streaming genutzt werden. Aufgrund des geringen Speichers klappt das nur bei niederigen Bit-Raten (z.B. 128 kBit\/s) und einem stabilen WLAN gut, ansonsten kommt es zu Aussetzern. 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