{"id":6949,"date":"2025-11-24T11:57:11","date_gmt":"2025-11-24T10:57:11","guid":{"rendered":"https:\/\/www.pschatzmann.ch\/home\/?p=6949"},"modified":"2025-11-24T11:57:56","modified_gmt":"2025-11-24T10:57:56","slug":"a-dlna-control-point-in-arduino","status":"publish","type":"post","link":"https:\/\/www.pschatzmann.ch\/home\/2025\/11\/24\/a-dlna-control-point-in-arduino\/","title":{"rendered":"Implementing a DLNA Control Point in Arduino"},"content":{"rendered":"\n

In my last blogs<\/a>, I was showing how to create DLNA devices<\/strong>. In my final blog about this topic I will demonstrate how to create a \nDLNA Control Point<\/strong> (=Client) which uses the functionality of these devices.<\/p>\n\n\n\n

I will demo a simple Control Point for a Media Renderer which will start playing some music:<\/p>\n\n\n\n

The Arduino Sketch<\/h3>\n\n\n\n

First we define the relevant objects:<\/p>\n\n\n

#include \"WiFi.h\"<\/span>\n#include \"dlna.h\"<\/span>\n\n\/\/ Replace these with your WiFi credentials<\/span>\nconst<\/span> char* ssid = \"YOUR_SSID\"<\/span>;\nconst<\/span> char* password = \"YOUR_PASSWORD\"<\/span>;\n\nDLNAControlPoint cp; \/\/ w\/o Notifications<\/span>\nHttpRequest<WiFiClient> http;\nUDPService<WiFiUDP> udp;\nDLNAControlPointMediaRenderer renderer(cp, http, udp);\n<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
In the Arduino setup() we start the processing:<\/p>\n\n\n
void setup() {\n  Serial.begin(115200<\/span>);\n  DlnaLogger.begin(Serial, DlnaLogLevel::Info);\n\n  setupWifi();\n\n  \/\/ Start control point to discover devices: min 1 sec - max 10 min<\/span>\n  if<\/span> (!renderer.begin(1000<\/span>, 10<\/span> * 60<\/span> * 1000<\/span>)) {\n    Serial.println(\"No devices found\"<\/span>);\n    return<\/span>;\n  }\n\n  \/\/ Print number of discovered renderers<\/span>\n  Serial.print<\/span>(\"Renderer count: \"<\/span>);\n  Serial.println(renderer.getDeviceCount());\n\n  \/\/ Use first discovered renderer device<\/span>\n  renderer.setDeviceIndex(0<\/span>);\n\n  \/\/ Starting playback<\/span>\n  Serial.println(\"Starting playback...\"<\/span>);\n  if<\/span> (!renderer.play(\"http:\/\/stream.srg-ssr.ch\/m\/rsj\/mp3_128\"<\/span>)) {\n    Serial.println(\"Play failed\"<\/span>);\n  } else<\/span> {\n    Serial.println(\"Play command sent\"<\/span>);\n  }\n}\n<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
The loop processing is like in all other examples also pretty simple: we just call the loop processing logic of the control point:<\/p>\n\n\n
void<\/span> loop() { cp.loop(); }\n<\/code><\/span>Code language:<\/span> JavaScript<\/span> (<\/span>javascript<\/span>)<\/span><\/small><\/pre>\n\n\n
Dependencies<\/h3>\n\n\n\n
We just start the control point by calling begin. When begin returns we select one of the provided devices: in ths example we \njust use the first device and we are ready to call the available methods<\/a> (e.g. play in the example above)<\/p>\n\n\n\n