Documentation Revision History#

Revision 3.5.2 released Septemeber, 2025#

SoC only#

  • Updated applications prints for Wi-Fi M4 firmware update.

NCP only#

  • None

SoC and NCP#

  • Updated readme of Wi-Fi - Azure IoT MQTT client application.

  • Marked internal Wi-Fi transceiver mode configurations as unsupported for the current release.

  • Updated the readme for WLAN TCP TX on periodic wakeup example.

  • Updated readme of Wi-Fi - Embedded MQTT client example correcting the units of Keepalive timer as seconds.

  • Updated readme of Crypto - AES example.

  • Removed incorrect HTTPS server references from documentation.

  • Added documentation for the TLS_EXTENSION_ENABLE macro in the TLS client example.

  • Added recommendation settings as a note in example applications.

  • Update Flash Read Write readme to include note on flash memory erasure before write operations.

  • Added readme for NAT application, Wi-Fi - Dual Network Stack NWP + M4.

  • Updated application prints for Wi-Fi Firmware update example.

  • Updated the error code for SL_STATUS_SI91X_HOST_VOLTAGE_OUT_OF_RANGE.

  • Updated the readme of Wi-Fi Coex - Wi-Fi Client BLE Provisioning with AWS (Devkit) example.

  • Updated sl_wifi_update_su_gain_table API documentation to improve clarity.

  • Updated sl_si91x_rsp_wireless_info_t structure documentation to improve clarity.

  • Updated SL_WIFI_FEAT_DISABLE_SHORT_GI documentation with a note on it's impact on 802.11n and 802.11ax data rates.

Revision 3.5.0 released June, 2025#

SoC only#

  • Updated README documentation with output images in Wi-Fi - NWP Or Combined (NWP & M4) Firmware Update via TCP example.

  • Updated the Wi-Fi – AWS IoT MQTT Client example README to include the latest application print images.

NCP only#

  • Updated the API description for sl_http_server_init() and updated the README for the multithreading application.

SoC and NCP#

  • Updated the README documentation with the path to scripts to be used in Wi-Fi - HTTP Client and Wi-Fi - HTTP Server examples.

  • Updated the README documentation for the Wi-Fi - Concurrent HTTP Server Provisioning as per new flow.

  • Updated the README documentation with the steps to update the user gain table for the Wireless Test example.

  • Updated the sl_wifi_stats_callback_t documentation to include a note directing users to the reference section for Access Point (AP) deauthentication reason codes.

  • Updated documentation for sl_wifi_bss_type_t to specify supported and unsupported BSS types.

  • Updated documentation for NWP UART baud rate and steps to capture RAM dump details.

  • Revised the documentation to specify that sl_wifi_send_raw_data_frame() usage is supported only after the module is in connected state.

  • Updated README documentation with alarm-based wakeup information in Wi-Fi - AWS IoT MQTT Client example.

  • Updated documentation in the note section sl_net_deinit() to explain that this function should not be called after an M4 OTA firmware upgrade.

  • Updated type variable documentation in sl_si91x_socket_type_length_value_t structure.

  • Updated README with images aligned to the mobile application interface.

  • Updated interface usage recommendation note in the sl_net_deinit() API documentation.

  • Updated option_name and option_value documentation for the TLS feature in sl_si91x_setsockopt() API.

  • Updated connection timeout recommendations in sl_wifi_connect() for different security modes.

  • Updated usage notes to clarify correct sequencing of sl_wifi_* and sl_net_* API functions, helping prevent undefined behavior during Wi-Fi/Network interface.

  • Updated the error code for SL_STATUS_SI91X_HOST_VOLTAGE_OUT_OF_RANGE.

  • Updated the sl_si91x_gcm API documentation to specify the maximum supported message length.

  • Added a note for configuring crystal good time using the sl_si91x_set_nwp_config_request API.