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samples: siwx917_ota: http/s OTAF application
This application demonstrates the support for OTA firmware upgrade. Signed-off-by: Devika Raju <[email protected]>
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‎samples/siwx91x_ota/CMakeLists.txt‎

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# Copyright (c) 2025 Silicon Laboratories Inc.
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# SPDX-License-Identifier: Apache-2.0
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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project(siwx91x_ota)
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target_sources(app PRIVATE src/main.c src/ca-cert_der.c)
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# Ensure the directory for the generated file exists
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set(gen_dir ${ZEPHYR_BINARY_DIR}/include/generated/)
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file(MAKE_DIRECTORY ${gen_dir})

‎samples/siwx91x_ota/Kconfig‎

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# Config options for OTA application
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#
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# Copyright (c) 2025 Silicon Laboratories Inc.
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# SPDX-License-Identifier: Apache-2.0
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mainmenu "SiWx91x OTA Configuration"
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menu "SiWx91x OTA application options"
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config OTA_WIFI_SSID
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string "WiFi SSID"
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default "your_ssid"
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help
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WiFi SSID for the network to connect to.
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config OTA_WIFI_PSK
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string "WiFi PSK"
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default "your_psk"
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help
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WiFi PSK (password) for the network to connect to.
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config OTA_WIFI_SECURITY_TYPE
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int "WiFi security type"
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default 0
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range 0 1
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help
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WiFi security type for the network connection.
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0: Open (default)
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1: WPA2-PSK
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config OTA_IP_PROTOCOL_SELECTION
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int "IP protocol selection"
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default 0
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range 0 1
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help
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Select IP protocol for OTA connection.
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0: IPv4 (default)
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1: IPv6
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config OTA_UPDATE_URL
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string "OTA update URL"
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default "http://example.com:8080/firmware.rps"
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help
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The full URL for the OTA firmware update.
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endmenu
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source "Kconfig.zephyr"

‎samples/siwx91x_ota/README.rst‎

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# Copyright (c) 2025 Silicon Laboratories Inc.
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# SPDX-License-Identifier: Apache-2.0
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.. zephyr:code-sample:: siwx91x_otas
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:name: HTTP OTA Firmware Update on SiWx917
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:relevant-api: wifi
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Demonstrates HTTP/HTTPS OTA firmware update using SiWx917 on Zephyr.
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Overview
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********
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Application demonstrates how to perform HTTP/HTTPS OTA firmware updates on the
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SiWx917 platform using Zephyr RTOS. It connects to a Wi-Fi network, establishes
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a secure HTTPS connection using a CA certificate, and downloads firmware
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updates from a remote server. The application showcases secure connectivity and
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OTA update mechanisms for IoT devices.
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Requirements
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************
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* SiWx917 development board with Wi-Fi support
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* HTTP server
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Configurations
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**************
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The following configurations can be modified in ``prj.conf``:
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* Wi-Fi Settings
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* ``CONFIG_OTA_WIFI_SSID`` - Network name
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* ``CONFIG_OTA_WIFI_PSK`` - Network password
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* ``CONFIG_OTA_WIFI_SECURITY_TYPE`` - wifi security type (0 - no security, 1 - WPA2-PSK security)
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* ``CONFIG_OTA_IP_PROTOCOL_SELECTION`` - Select IPv4 or IPv6
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* OTA Server Settings
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* ``CONFIG_OTA_SERVER_IP`` or ``CONFIG_OTA_SERVER_HOSTNAME`` - Server address
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* ``CONFIG_OTA_SERVER_PORT`` - Server port
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* ``CONFIG_OTA_RPS_FILE`` - Firmware file on server
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* ``CONFIG_OTA_HTTPS_SUPPORT`` - Enable HTTPS (default: disabled)
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* ``CONFIG_OTA_USE_DNS_RESOLVER`` - Enable DNS resolution (set to 1 to use
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``CONFIG_OTA_SERVER_HOSTNAME``)
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.. _signed image generation:
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https://docs.zephyrproject.org/latest/kconfig.html#CONFIG_SIWX91X_SIGN_KEY
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Building and Running
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********************
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1. Configure required settings
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2. Build and Flash
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.. code-block:: console
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west build -b siwx917_rb4338a siwx917_ota -p
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west flash
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3. Run HTTP/HTTPS server
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Test the Application
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********************
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1. After flashing the SiWx91x, the device will scan for the specified AP and
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attempt to connect if found.
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2. Once connected, the SiWx91x will initiate an HTTP/S connection to the specified
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server and download the firmware binary.
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3. The OTA update process will be logged to the serial console.
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Note
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****
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This application is not for production.

‎samples/siwx91x_ota/prj.conf‎

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# Copyright (c) 2025 Silicon Laboratories Inc.
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# SPDX-License-Identifier: Apache-2.0
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# Network Stack Configuration
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CONFIG_NETWORKING=y
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CONFIG_NET_MGMT=y
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CONFIG_NET_TCP=y
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CONFIG_NET_CONNECTION_MANAGER=y
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# IPv4/IPv6 Support
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CONFIG_NET_IPV4=y
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CONFIG_NET_IPV6=y
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CONFIG_NET_ARP=y
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CONFIG_NET_DHCPV4=y
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CONFIG_NET_DHCPV6=n
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# WiFi Configuration
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CONFIG_WIFI=y
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# Memory and Threading
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CONFIG_MAIN_STACK_SIZE=2048
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CONFIG_INIT_STACKS=y
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CONFIG_HEAP_MEM_POOL_SIZE=8192
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# CMSIS Configuration
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CONFIG_CMSIS_V2_MUTEX_MAX_COUNT=10
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CONFIG_CMSIS_V2_EVT_FLAGS_MAX_COUNT=10
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# Network Parameters
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CONFIG_NET_TCP_MAX_RECV_WINDOW_SIZE=10240
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# Socket Support
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CONFIG_REQUIRES_FULL_LIBC=y
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CONFIG_NET_SOCKETS=y
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# HTTP Client Configuration
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CONFIG_HTTP_CLIENT=y
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CONFIG_HTTP_PARSER_URL=y
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CONFIG_NET_MGMT_EVENT=y
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# TLS Security Configuration
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CONFIG_MBEDTLS=y
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CONFIG_MBEDTLS_BUILTIN=y
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CONFIG_MBEDTLS_ENABLE_HEAP=y
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CONFIG_MBEDTLS_HEAP_SIZE=60000
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CONFIG_TLS_CREDENTIALS=y
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CONFIG_NET_SOCKETS_SOCKOPT_TLS=y
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CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN=8000
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# TLS Protocol and Cipher Configuration
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CONFIG_MBEDTLS_TLS_VERSION_1_2=y
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CONFIG_MBEDTLS_SHA256=y
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CONFIG_MBEDTLS_CIPHER_AES_ENABLED=y
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CONFIG_MBEDTLS_CIPHER_ALL_ENABLED=y
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CONFIG_MBEDTLS_CIPHER_CHACHA20_ENABLED=y
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CONFIG_MBEDTLS_POLY1305=y
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CONFIG_ASSERT=y
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# DNS configuration
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CONFIG_DNS_RESOLVER=y
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# for SLAAC configuration
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CONFIG_NET_IPV6_ND=y
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CONFIG_NET_IPV6_RA_RDNSS=y
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CONFIG_NET_IPV6_NBR_CACHE=y
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CONFIG_NET_IPV6_MLD=y
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CONFIG_NET_IPV6_DAD=y
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# Wi-Fi configuration
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CONFIG_OTA_WIFI_SSID="<AP-NAME>"
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CONFIG_OTA_WIFI_PSK="<AP-PASSWORD>"
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CONFIG_OTA_WIFI_SECURITY_TYPE=0
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CONFIG_OTA_IP_PROTOCOL_SELECTION=0
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# OTA Configuration
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CONFIG_WIFI_SILABS_SIWX91X_FIRMWARE_UPGRADE=y

‎samples/siwx91x_ota/sample.yaml‎

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# Copyright (c) 2025 Silicon Laboratories Inc.
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# SPDX-License-Identifier: Apache-2.0
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sample:
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name: HTTP/HTTPS OTAF
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description: HTTP/HTTPS OTA firmware update application for SiWx917
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tests:
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sample.net.http_otaf:
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harness: net
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platform_allow:
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- siwx917_rb4338a
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tags:
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- net
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- wifi
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- http
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- tls
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- ota
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integration_platforms:
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- siwx917_rb4338a

‎samples/siwx91x_ota/src/ca-cert_der.c‎

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/*
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* Copyright (c) 2025 Silicon Laboratories Inc.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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const unsigned char ca_cert_der[] = {
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0x01, 0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x25, 0x04, 0x16, 0x30, 0x14, 0x06, 0x08, 0x2b,
74+
0x06, 0x01, 0x05, 0x05, 0x07, 0x03, 0x01, 0x06, 0x08, 0x2b, 0x06, 0x01, 0x05, 0x05, 0x07,
75+
0x03, 0x02, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x0b,
76+
0x05, 0x00, 0x03, 0x82, 0x01, 0x01, 0x00, 0x77, 0x3b, 0x3d, 0x66, 0x74, 0xbc, 0x97, 0xfe,
77+
0x40, 0x16, 0xe6, 0xba, 0xa5, 0xd5, 0xd1, 0x84, 0x08, 0x89, 0x69, 0x4f, 0x88, 0x0d, 0x57,
78+
0xa9, 0xef, 0x8c, 0xc3, 0x97, 0x52, 0xc8, 0xbd, 0x8b, 0xa2, 0x49, 0x3b, 0xb7, 0xf7, 0x5d,
79+
0x1e, 0xd6, 0x14, 0x7f, 0xb2, 0x80, 0x33, 0xda, 0xa0, 0x8a, 0xd3, 0xe1, 0x2f, 0xd5, 0xbc,
80+
0x33, 0x9f, 0xea, 0x5a, 0x72, 0x24, 0xe5, 0xf8, 0xb8, 0x4b, 0xb3, 0xdf, 0x62, 0x90, 0x3b,
81+
0xa8, 0x21, 0xef, 0x27, 0x42, 0x75, 0xbc, 0x60, 0x02, 0x8e, 0x37, 0x35, 0x99, 0xeb, 0xa3,
82+
0x28, 0xf2, 0x65, 0x4c, 0xff, 0x7a, 0xf8, 0x8e, 0xcc, 0x23, 0x6d, 0xe5, 0x6a, 0xfe, 0x22,
83+
0x5a, 0xd9, 0xb2, 0x4f, 0x47, 0xc7, 0xe0, 0xae, 0x98, 0xef, 0x94, 0xac, 0xb6, 0x4f, 0x61,
84+
0x81, 0x29, 0x8e, 0xe1, 0x79, 0x2c, 0x46, 0xfc, 0xe9, 0x1a, 0xc3, 0x96, 0x1f, 0x19, 0x93,
85+
0x64, 0x2e, 0x9f, 0x37, 0x72, 0xc5, 0xe4, 0x93, 0x4e, 0x61, 0x5f, 0x38, 0x8e, 0xae, 0xe8,
86+
0x39, 0x19, 0xe6, 0x97, 0xa8, 0x91, 0xd4, 0x23, 0x7e, 0x1e, 0xd2, 0xd0, 0x53, 0xec, 0xcc,
87+
0xac, 0xa0, 0x1d, 0xd0, 0xb7, 0xdd, 0xb1, 0xb7, 0x01, 0x2e, 0x96, 0xcd, 0x85, 0x27, 0xe0,
88+
0xe7, 0x47, 0xe2, 0xc1, 0xc1, 0x00, 0xf6, 0x94, 0xdf, 0x77, 0xe7, 0xfa, 0xc6, 0xef, 0x8a,
89+
0xc0, 0x7c, 0x67, 0xbc, 0xff, 0xa0, 0x7c, 0x94, 0x3b, 0x7d, 0x86, 0x42, 0xaf, 0x3d, 0x83,
90+
0x31, 0xee, 0x2a, 0x3b, 0x7b, 0xf0, 0x2c, 0x9e, 0x6f, 0xe9, 0xc4, 0x07, 0x81, 0x24, 0xda,
91+
0x05, 0x70, 0x4d, 0xdd, 0x09, 0xae, 0x9e, 0x72, 0xb8, 0x21, 0x0e, 0x8c, 0xb2, 0xab, 0xaa,
92+
0x4c, 0x49, 0x10, 0xf7, 0x76, 0xf9, 0xb5, 0x0d, 0x6c, 0x20, 0xd3, 0xdf, 0x7a, 0x06, 0x32,
93+
0x8d, 0x29, 0x1f, 0x28, 0x1d, 0x8d, 0x26, 0x33};
94+
unsigned int ca_cert_der_len = 1283;

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