Release notes

This page lists the new features, improvements, and bug fixes in each IoT SDK release.

v1.9.7

Released on September 2, 2026.

This release consolidates the key updates introduced from v1.8.0 through v1.9.7. Across the 1.9.x series, the SDK focuses on four areas: more reliable connectivity, more complete messaging and control capabilities, stronger media processing, and easier integration and maintenance. The 1.9.x series expands the SDK from a lightweight media transport stack into a more complete foundation for production IoT deployments.

New features

• More flexible connection management: Adds the Connection ID mechanism and the corresponding agora_rtc_create_connection, agora_rtc_destroy_connection, and agora_rtc_get_connection_info APIs, enabling more flexible RTC connection lifecycle management. See Manage connections.

• Built-in license validation: Adds automatic license validation during channel join and the on_license_validation_failure callback for explicit failure reporting. See Implement licensing.

• Reliable messaging and richer control paths: Adds RDT-based reliable messaging, including agora_rtc_send_rdt_msg, agora_rtc_get_rdt_status_info, on_rdt_state, and on_rdt_msg, making it easier to deliver control and device messages reliably. See Send messages through the RDT channel.

• String UID support: Adds User Account-based APIs, including agora_rtc_join_channel_with_user_account, agora_rtc_get_user_info_by_user_account, and agora_rtc_get_user_info_by_uid, to support String UID-based identity systems. See Identify users with String UID.

• Expanded media and network capabilities: Adds video rotation reporting, media encryption through crypto_opt, configurable audio packet duration through pcm_duration, 8 kHz AAC-LC support, downlink AEC, RDT encryption, the enable_rdt option, and IPv6 support. See Configure the audio codec for the audio codec changes.

• More resilient Signaling transport: Adds AUT-based transport to improve Signaling reliability in weak-network environments.

Improvements

• Improved connection resilience: Adds the on_reconnecting callback and refines the behavior of connection-related callbacks, making it easier to detect and handle temporary network interruptions.

• More flexible video frame-rate configuration: Changes video_frame_info_t.frame_rate from an enum to an integer. Applications can now configure frame rates from 1 to 60 fps.

• Improved audio processing: Improves audio codec decoupling, jitter buffering, audio mixing, packet-loss handling, and downlink audio processing for real-time conversational scenarios.

• Improved Signaling stability and usability: Improves login performance, keepalive behavior, timeout handling, reconnection behavior, and error reporting. The maximum Signaling message payload size is now 31 KB.

• Improved error handling: Refines error-code organization and adds the RTM_MSG_STATE_TIMEOUT message state.

Bug fixes

• Fixed an issue where video RTP timestamps occasionally failed.

v1.8.0

Released on May 1, 2023.

New features

• Two-way audio and video communication between IoT SDK instances as well as between IoT SDK and RTC SDK for Android, iOS, macOS, Windows, and web.

• Providing a target bitrate per bandwidth estimation (BWE) algorithms.

• Requesting key frames from remote users.

• Muting and unmuting local and remote media streams.

• Monitoring the transmission state of remote media streams.