{"id":6931,"date":"2025-11-17T14:49:52","date_gmt":"2025-11-17T13:49:52","guid":{"rendered":"https:\/\/www.pschatzmann.ch\/home\/?p=6931"},"modified":"2025-11-17T15:43:05","modified_gmt":"2025-11-17T14:43:05","slug":"implementing-a-dlna-media-server-in-arduino","status":"publish","type":"post","link":"https:\/\/www.pschatzmann.ch\/home\/2025\/11\/17\/implementing-a-dlna-media-server-in-arduino\/","title":{"rendered":"Implementing a DLNA Media Server in Arduino"},"content":{"rendered":"\n

After having demonstrated how to implement a DLNA Media Renderer<\/a> in the last blog, I show that it is equally simple to define a DLNA media server<\/strong>.<\/p>\n\n\n\n

Here is the outline of a basic sketch:<\/p>\n\n\n

#include \"WiFi.h\"<\/span>\n#include \"DLNA.h\"<\/span>\n\n\/\/ Replace with your WiFi credentials<\/span>\nconst<\/span> char* ssid = \"YOUR_SSID\"<\/span>;\nconst<\/span> char* password = \"YOUR_PASSWORD\"<\/span>;\n\nconst<\/span> int port = 9000<\/span>;\nWiFiServer wifi(port);\nHttpServer<WiFiClient, WiFiServer> server(wifi);\nUDPService<WiFiUDP> udp;\nDLNAMediaServer<WiFiClient> mediaServer(server, udp);\n\nvoid setup() {\n  Serial.begin(115200<\/span>);\n  DlnaLogger.begin(Serial, DlnaLogLevel::Warning);\n\n  setupWifi();\n\n  \/\/ define local base URL based on assigned IP address<\/span>\n  mediaServer.setFriendlyName(\"ArduinoMediaServer\"<\/span>);\n  mediaServer.setBaseURL(WiFi.localIP(), port);\n  mediaServer.setReference(nullptr);  \/\/ not needed for this example<\/span>\n  mediaServer.setPrepareDataCallback(myPrepareData);\n  mediaServer.setGetDataCallback(myGetData);\n\n  if<\/span> (mediaServer.begin()) {\n    Serial.println(\"MediaServer started\"<\/span>);\n  } else<\/span> {\n    Serial.println(\"MediaServer failed to start\"<\/span>);\n  }\n}\n\nvoid loop() { mediaServer.loop(); }\n<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
\/\/ prepare the data returinng the numberReturned and totalMatches<\/span>\nvoid<\/span> myPrepareData(const<\/span> char* objectID, ContentQueryType queryType,\n                   const<\/span> char* filter, int startingIndex, int requestedCount,\n                   const<\/span> char* sortCriteria, int& numberReturned,\n                   int& totalMatches, int& updateID, void<\/span>* reference) {\n \/\/ prepare the data using                 <\/span>\n}\n\n\/\/ GetData callback: returns each item by index<\/span>\nbool myGetData(int index, MediaItem& item, void<\/span>* reference) {\n  \/\/ fill the MediaItem for the requested index<\/span>\n}\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
Complete Examples<\/h3>\n\n\n\n
I am providing an example that just uses some predefined urls to internet radios<\/strong> and an example that loads the data \nfrom an SD to a tree using the SDFAT library<\/strong> with the approach described in my last blog<\/a>.<\/p>\n\n\n\n
In addition you might need to configure the webserver to render the file indicated by the resourceURI that you provide in the MediaItem<\/a>. <\/p>\n\n\n\n
The logic for setting up and starting a server is basically the same like the one for the Media Renderer just using the DLNAMediaServer<\/a> class: The key for this scenario however are two callbacks: one for preparing<\/strong> and the other for providing the data<\/strong>:<\/p>\n\n\n