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Release Notes - IoT

This page will keep you updated with all the releases of IoT SDK.

v0.3.2​

Release Date : 31st July 2026

Documentation​

  • Docs & reliability: Reorganized and refreshed the guides (boards-as-rows tables with hardware links, clearer prerequisites, up-to-date version pins), plus more detailed connection error reporting and steadier data-channel handling in the refreshed prebuilt libraries.

v0.3.1​

Release Date : 27th July 2026

Breaking Changes​

  • The separate stop-audio calls were removed. The SDK now tears down every direction automatically when you call leave(), so stopPublishAudio() and stopSubscribeAudio() are no longer available.
  • The DUPLICATE_ID (3024) result code was removed. All other result codes remain unchanged.

Improvements​

  • More dependable video reception on the ESP32-S3-Korvo-2, with smoother display playback.

Updates​

  • Tested and supported on ESP-IDF 5.4.2, 5.4.3, and 5.4.4.

v0.3.0​

Release Date : 11th July 2026

Breaking Changes​

  • startPublishAudio() no longer takes an argument. Set the device's id once in the new init_config_t.participantId field instead:
// before
startPublishAudio("my-device-id");

// now
init_config_t cfg = { ..., .participantId = "my-device-id" };
init(&cfg);
startPublishAudio();

Leave participantId as "" or NULL and you still get a random id, as before.

  • init_config_t has a new participantId field. Rebuild your application against the new header. See Initialize Meeting.

Features​

  • Send and receive messages during a call. Open the channel with startMessageChannel(), send text or binary with sendMessage(), and close it with stopMessageChannel(). Register setDataMessageHandler() to receive what other participants send. See Send Message and Receive Message.
  • setConnectionStateHandler() reports when the connection comes up or drops, so your application can rejoin after a disconnect.
  • Audio can be sent as PCMU or Opus in addition to PCMA. Pick one with init_config_t.audioCodec.
  • Pick the log verbosity at runtime with videosdk_set_log_mode(). VIDEOSDK_LOG_NORMAL keeps the lifecycle, warning and error lines; VIDEOSDK_LOG_DEBUG adds the periodic heartbeats and diagnostics. Call it before init().

Updates​

  • Two new result codes: DATA_CHANNEL_NOT_STARTED (3025) means sendMessage() was called before the channel was opened, and DATA_CHANNEL_QUEUE_FULL (3026) means messages are being queued faster than they can be sent. See Result Code.
  • sendMessage() now accepts up to 24000 bytes per message, down from 60000.

Fixes​

  • Building a bundled example no longer shows the board and VideoSDK menus twice in menuconfig.

v0.2.2​

Release Date : 1st July 2026

Breaking Changes​

  • startSubscribeAudio() no longer takes arguments.
  • audio_codec_t temporarily offers only AUDIO_CODEC_PCMA. PCMU and Opus return in v0.3.0.

Features​

Updates​

  • The component now pulls in everything the video path needs, so you do not have to add those dependencies yourself. The minimum ESP-IDF version is now 5.4.

Fixes​

  • More reliable receive path, and fewer leaks over long sessions.

v0.0.4​

Release Date : 27th April 2026

  • Fix: Resolved undefined-reference errors that could appear when linking the component into an application.

v0.0.3​

Release Date : 27th April 2026

  • Fix: The component now declares its own runtime dependencies, so adding it to a project no longer produces undefined-reference errors at link time.
  • Update: The manifest now carries the repository, issue tracker and documentation links, along with tags and the supported targets.

v0.0.2​

Release Date : 20th January 2026

  • Update: Refreshed the prebuilt libraries for the ESP32-S3-Korvo-2.

v0.0.1​

Release Date : 23rd September 2025

  • Initial release of the VideoSDK IoT SDK.

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Last updated on by karan07080
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