Network Stack SDK Version 2.12.1 (September 10, 2025) - Release Notes#
The Netstack software development kit (SDK) provides robust network protocol support, including TCP/IP, UDP, and DNS capabilities for embedded applications.
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Release Summary#
Key Features | API Changes | Bug Fixes | Chip Enablement
Key Features#
None
API Changes#
Enhanced DNS functionality with automatic DHCP configuration, improved asynchronous query support.
Bug Fixes#
DNS server addresses are now automatically configured when DNS mode is enabled.
Updated rsi_send API documentation for error handling clarity.
Chip Enablement#
None
Key Features#
None
New Features | Enhancements | Removed Features | Deprecated Features
Note: See Feature Matrix for a list of any applicable APIs, examples, software variants, modes, hardware, and host interfaces for each feature.
New Features#
None
Enhancements#
Enhanced DNS request handling by introducing the rsi_dns_req_async API for asynchronous, non-blocking DNS resolution.
Removed Features#
None
Deprecated Features#
None
API Changes#
New APIs | Modified APIs | Removed APIs | Deprecated APIs
New APIs#
None
Modified APIs#
None
Removed APIs#
None
Deprecated APIs#
None
Bug Fixes#
| ID | Issue Description | GitHub / Salesforce Reference (if any) | Affected Chip Revision, Hardware, Host Interfaces |
|---|---|---|---|
| 1440307 | Updated rsi_send API documentation for error handling clarity. | None |
|
| 1478550 | DNS server addresses are now automatically configured when DNS mode is enabled. | None |
|
Chip Enablement#
None
Application Example Changes#
New Examples | Modified Examples | Removed Examples | Deprecated Examples
New Examples#
None
Modified Examples#
None
Removed Examples#
None
Deprecated Examples#
None
Known Issues and Limitations#
| ID | Issue or Limitation Description | GitHub / Salesforce Reference (if any) | Workaround (if any) | Affected Chip Revision, Hardware, Host Interfaces |
|---|---|---|---|---|
| NA | Embedded MQTT does not support reassembly of fragmented MQTT packets. MQTT transactions may fail if fragmented packets are received from the broker. | None | None |
|
| NA | TLS handshakes may occasionally fail due to incorrect ECC curve parameter generation, resulting in a BBD2 error. The issue resolves on the next attempt. | None | None |
|
| NA | MQTT disconnects may occur during firmware updates if powersave is enabled. Disable powersave during the update and re-enable it after completion. | None | None |
|
| NA | All GCM-based cipher suites are software-implemented and may exhibit limited performance. | None | None |
|
| NA | The recommended MQTT publish payload is 1 kB. | None | None |
|
| NA | If HTTP server functionality is enabled, do not use port 80 for the MQTT client. | None | None |
|
| NA | Randomize the client port if using rapid connect/disconnect of the MQTT session on the same client port with powersave. | None | None |
|
| NA | Secure TLS renegotiation is not supported in the embedded networking stack. | None | None |
|
| NA | In WPA2 enterprise security mode, getting wireless statistics using rsi_wlan_get() API has restrictions. | None | None |
|
| NA | The wlan_throughput_bt_spp_ble_dual_role example is not supported on bare metal platforms. | None | None |
|
| NA | In concurrent mode, communication loss could occur on the STA application when, simultaneously, multiple clients are connected to the APUT. | None | None |
|
| NA | IP address conflict detection has limitations in STA + AP concurrent mode, and failures are not reported to host. | None | None |
|
| NA | mqtt_client and mqtt_client_v6 applications do not support the SDIO host interface. | None | None |
|
| NA | If a corrupted firmware image is received during OTA updates via TCP/HTTP, the module may become unresponsive on the next bootup. | None | None |
|
| NA | TLS connection problems may occur when attempting to revoke public and private keys using existing keys. | None | None |
|
| NA | Observed STA + BT (connected) test cases not getting throughput results prints in TeraTerm. | None | None |
|
| NA | Observed inconsistency in TCP and UDP - Rx throughputs in AP alone mode. | None | None |
|
| NA | Observed duplicate IPv6 address is assigned to multiple STAs in AP mode. | None | None |
|
| NA | Ping timeouts may occur when configured with a 1-second timeout. | None | None |
|