Mbed TLS のライセンス表記（冒頭部分・原文）

著作権者：The Mbed TLS Contributors・Espressif Systems

Mbed TLS files are provided under a dual [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html)
OR [GPL-2.0-or-later](https://spdx.org/licenses/GPL-2.0-or-later.html) license.
This means that users may choose which of these licenses they take the code
under.

TF-PSA-Crypto のライセンス表記（冒頭部分・原文）

著作権者：The Mbed TLS Contributors・Espressif Systems

TF-PSA-Crypto files are provided under a dual [Apache-2.0](https://spdx.org/licenses/Apache-2.0.html)
OR [GPL-2.0-or-later](https://spdx.org/licenses/GPL-2.0-or-later.html) license.
This means that users may choose which of these licenses they take the code
under.

Apache License 2.0

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espressif/mqtt のライセンス末尾の著作権表示：Copyright 2016 Tuan PM

FreeRTOS-Kernel 10.5.1

著作権者：Amazon.com, Inc. or its affiliates・Espressif Systems

MIT License

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
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http_parser 2.7.0

/* Based on src/http/ngx_http_parse.c from NGINX copyright Igor Sysoev
 *
 * Additional changes are licensed under the same terms as NGINX and
 * copyright Joyent, Inc. and other Node contributors. All rights reserved.
 *
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 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

esp_littlefs 1.22.3

Copyright 2020 Brian Pugh

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

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ArduinoJson 7.4.2

The MIT License (MIT)
---------------------

Copyright © 2014-2025, Benoit BLANCHON

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

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lwIP 2.2.0

Copyright (c) 2001, 2002 Swedish Institute of Computer Science.
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
OF SUCH DAMAGE.

littlefs

Copyright (c) 2022, The littlefs authors.
Copyright (c) 2017, Arm Limited. All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
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ESP-IDF v6.1 および espressif/mqtt 1.1.0 に含まれる BSD 系ライセンスのファイル

各ファイルの冒頭に記載されたライセンス表記を、原文のまま掲載しています。条文の全文が記載されていないファイルには、末尾に掲載した SPDX の標準条文が適用されます。

========================================================================
esp-idf/components/heap/tlsf/tlsf.c（libheap.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 2006-2016 Matthew Conte
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

========================================================================
esp-idf/components/esp_netif/lwip/netif/ethernetif.c（libesp_netif.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 2001-2004 Swedish Institute of Computer Science
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * SPDX-FileContributor: 2015-2025 Espressif Systems (Shanghai) CO LTD
 */
/**
 * @file
 * Ethernet Interface Skeleton
 *
 */

========================================================================
esp-idf/components/esp_netif/lwip/netif/wlanif.c（libesp_netif.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 2001-2004 Swedish Institute of Computer Science
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * SPDX-FileContributor: 2015-2025 Espressif Systems (Shanghai) CO LTD
 */
/**
 * @file
 * Ethernet Interface Skeleton used for WiFi
 *
 */

========================================================================
esp-idf/components/lwip/port/freertos/sys_arch.c（liblwip.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 2001-2003 Swedish Institute of Computer Science
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * SPDX-FileContributor: 2018-2025 Espressif Systems (Shanghai) CO LTD
 */

/* lwIP includes. */

========================================================================
esp-idf/components/esp_system/ubsan.c（libesp_system.a）
------------------------------------------------------------------------
// Copyright (c) 2016, Linaro Limited
// Modified for HelenOS use by Jiří Zárevúcky.
// Adaptations for ESP-IDF Copyright (c) 2020 Espressif Systems (Shanghai) Co. Ltd.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.

========================================================================
esp-idf/components/esp_libc/src/string/memcmp.c（libesp_libc.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 1994-2009 Red Hat, Inc.
 *
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND Apache-2.0
 *
 * SPDX-FileContributor: 2025 Espressif Systems (Shanghai) CO LTD
 */

========================================================================
esp-idf/components/esp_libc/src/port/riscv/memmove.c（libesp_libc.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 1994-2009 Red Hat, Inc.
 *
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND Apache-2.0
 *
 * SPDX-FileContributor: 2025 Espressif Systems (Shanghai) CO LTD
 */

========================================================================
esp-idf/components/esp_libc/src/string/strncmp.c（libesp_libc.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 1994-2009 Red Hat, Inc.
 *
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND Apache-2.0
 *
 * SPDX-FileContributor: 2025 Espressif Systems (Shanghai) CO LTD
 */

========================================================================
esp-idf/components/esp_libc/src/string/strncpy.c（libesp_libc.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 1994-2009 Red Hat, Inc.
 *
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND Apache-2.0
 *
 * SPDX-FileContributor: 2025 Espressif Systems (Shanghai) CO LTD
 */

========================================================================
esp-idf/components/esp_libc/src/port/riscv/memcpy.c（libesp_libc.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 2017 SiFive Inc.
 *
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND Apache-2.0
 *
 * SPDX-FileContributor: 2025 Espressif Systems (Shanghai) CO LTD
 */
/* Copyright (c) 2017  SiFive Inc. All rights reserved.

   This copyrighted material is made available to anyone wishing to use,
   modify, copy, or redistribute it subject to the terms and conditions
   of the FreeBSD License.   This program is distributed in the hope that
   it will be useful, but WITHOUT ANY WARRANTY expressed or implied,
   including the implied warranties of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  A copy of this license is available at
   http://www.opensource.org/licenses.
*/

========================================================================
esp-idf/components/esp_libc/src/port/riscv/strcmp.S（libesp_libc.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 2017 SiFive Inc.
 *
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND Apache-2.0
 *
 * SPDX-FileContributor: 2025 Espressif Systems (Shanghai) CO LTD
 */
/* Copyright (c) 2017  SiFive Inc. All rights reserved.

   This copyrighted material is made available to anyone wishing to use,
   modify, copy, or redistribute it subject to the terms and conditions
   of the FreeBSD License.   This program is distributed in the hope that
   it will be useful, but WITHOUT ANY WARRANTY expressed or implied,
   including the implied warranties of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  A copy of this license is available at
   http://www.opensource.org/licenses.
*/

========================================================================
esp-idf/components/esp_libc/src/port/riscv/strcpy.c（libesp_libc.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 2017 SiFive Inc.
 *
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD AND Apache-2.0
 *
 * SPDX-FileContributor: 2025 Espressif Systems (Shanghai) CO LTD
 */
/* Copyright (c) 2017  SiFive Inc. All rights reserved.

   This copyrighted material is made available to anyone wishing to use,
   modify, copy, or redistribute it subject to the terms and conditions
   of the FreeBSD License.   This program is distributed in the hope that
   it will be useful, but WITHOUT ANY WARRANTY expressed or implied,
   including the implied warranties of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  A copy of this license is available at
   http://www.opensource.org/licenses.
*/

========================================================================
managed_components/espressif__mqtt/lib/mqtt_msg.c（libespressif__mqtt.a）
------------------------------------------------------------------------
/*
 * SPDX-FileCopyrightText: 2014 Stephen Robinson
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

========================================================================
SPDX の標準の条文：BSD-3-Clause
------------------------------------------------------------------------
Copyright (c) <year> <owner>.
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

========================================================================
SPDX の標準の条文：BSD-2-Clause-FreeBSD
------------------------------------------------------------------------
The FreeBSD Copyright

Copyright 1992-2012 The FreeBSD Project. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE FREEBSD PROJECT ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The views and conclusions contained in the software and documentation are those of the authors and should not be interpreted as representing official policies, either expressed or implied, of the FreeBSD Project.

GCC Runtime Library Exception 3.1

GCC RUNTIME LIBRARY EXCEPTION

Version 3.1, 31 March 2009

Copyright (C) 2009 Free Software Foundation, Inc. <http://fsf.org/>

Everyone is permitted to copy and distribute verbatim copies of this
license document, but changing it is not allowed.

This GCC Runtime Library Exception ("Exception") is an additional
permission under section 7 of the GNU General Public License, version
3 ("GPLv3"). It applies to a given file (the "Runtime Library") that
bears a notice placed by the copyright holder of the file stating that
the file is governed by GPLv3 along with this Exception.

When you use GCC to compile a program, GCC may combine portions of
certain GCC header files and runtime libraries with the compiled
program. The purpose of this Exception is to allow compilation of
non-GPL (including proprietary) programs to use, in this way, the
header files and runtime libraries covered by this Exception.

0. Definitions.

A file is an "Independent Module" if it either requires the Runtime
Library for execution after a Compilation Process, or makes use of an
interface provided by the Runtime Library, but is not otherwise based
on the Runtime Library.

"GCC" means a version of the GNU Compiler Collection, with or without
modifications, governed by version 3 (or a specified later version) of
the GNU General Public License (GPL) with the option of using any
subsequent versions published by the FSF.

"GPL-compatible Software" is software whose conditions of propagation,
modification and use would permit combination with GCC in accord with
the license of GCC.

"Target Code" refers to output from any compiler for a real or virtual
target processor architecture, in executable form or suitable for
input to an assembler, loader, linker and/or execution
phase. Notwithstanding that, Target Code does not include data in any
format that is used as a compiler intermediate representation, or used
for producing a compiler intermediate representation.

The "Compilation Process" transforms code entirely represented in
non-intermediate languages designed for human-written code, and/or in
Java Virtual Machine byte code, into Target Code. Thus, for example,
use of source code generators and preprocessors need not be considered
part of the Compilation Process, since the Compilation Process can be
understood as starting with the output of the generators or
preprocessors.

A Compilation Process is "Eligible" if it is done using GCC, alone or
with other GPL-compatible software, or if it is done without using any
work based on GCC. For example, using non-GPL-compatible Software to
optimize any GCC intermediate representations would not qualify as an
Eligible Compilation Process.

1. Grant of Additional Permission.

You have permission to propagate a work of Target Code formed by
combining the Runtime Library with Independent Modules, even if such
propagation would otherwise violate the terms of GPLv3, provided that
all Target Code was generated by Eligible Compilation Processes. You
may then convey such a combination under terms of your choice,
consistent with the licensing of the Independent Modules.

2. No Weakening of GCC Copyleft.

The availability of this Exception does not imply any general
presumption that third-party software is unaffected by the copyleft
requirements of the license of GCC.

GNU General Public License version 3 の全文：https://www.gnu.org/licenses/gpl-3.0.html

著作権者：Keith Packard・The Newlib Project・Red Hat ほか

picolibc のライセンスは、ファイルごとの著作権者と条文を列挙した長文の文書（約 24 万文字）のため、全文は以下のリンク先でご確認ください。

• picolibc 1.8.10 の COPYING.picolibc（原文）