ArduinoJson 7.4.2

Changes

• Fix truncated strings on Arduino Due (issue #2181)

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ArduinoJson 7.4.1

Changes

• Fix crash with tiny Flash strings (issue #2170)

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ArduinoJson 7.4.0

ℹ️ Read the blog post

Changes

• Optimize storage of tiny strings (up to 3 characters)
• Fix support for const char[] (issue #2166)

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ArduinoJson 7.3.1

Changes

• Fix conversion from static string to number
• Slightly reduce code size

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ArduinoJson 7.3.0

ℹ️ Read the blog post

Changes

• Fix support for NUL characters in deserializeJson()
• Make ElementProxy and MemberProxy non-copyable
• Change string copy policy: only string literal are stored by pointer
• JsonString is now stored by copy, unless specified otherwise
• Replace undocumented JsonString::Ownership with bool
• Rename undocumented JsonString::isLinked() to isStatic()
• Move public facing SFINAEs to template declarations

BREAKING CHANGES

In previous versions, MemberProxy (the class returned by operator[]) could lead to dangling pointers when used with a temporary string.
To prevent this issue, MemberProxy and ElementProxy are now non-copyable.

Your code is likely to be affected if you use auto to store the result of operator[]. For example, the following line won't compile anymore:

auto value = doc["key"];

To fix the issue, you must append either .as<T>() or .to<T>(), depending on the situation.

For example, if you are extracting values from a JSON document, you should update like this:

- auto config = doc["config"];
+ auto config = doc["config"].as<JsonObject>();
const char* name = config["name"];

However, if you are building a JSON document, you should update like this:

- auto config = doc["config"];
+ auto config = doc["config"].to<JsonObject>();
config["name"] = "ArduinoJson";

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ArduinoJson 7.2.1

Changes

• Forbid deserializeJson(JsonArray|JsonObject, ...) (issue #2135)
• Fix VLA support in JsonDocument::set()
• Fix operator[](variant) ignoring NUL characters

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ArduinoJson 7.2.0

ℹ️ Read the blog post

Changes

• Store object members with two slots: one for the key and one for the value
• Store 64-bit numbers (double and long long) in an additional slot
• Reduce the slot size (see table below)
• Improve message when user forgets third arg of serializeJson() et al.
• Set ARDUINOJSON_USE_DOUBLE to 0 by default on 8-bit architectures
• Deprecate containsKey() in favor of doc["key"].is<T>()
• Add support for escape sequence \' (issue #2124)

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ArduinoJson 7.1.0

ℹ️ Read the blog post

Changes

• Add ARDUINOJSON_STRING_LENGTH_SIZE to the namespace name
• Add support for MsgPack binary (PR #2078 by @Sanae6)
• Add support for MsgPack extension
• Make string support even more generic (PR #2084 by @d-a-v)
• Optimize deserializeMsgPack()
• Allow using a JsonVariant as a key or index (issue #2080)
  Note: works only for reading, not for writing
• Support ElementProxy and MemberProxy in JsonDocument's constructor
• Don't add partial objects when allocation fails (issue #2081)
• Read MsgPack's 64-bit integers even if ARDUINOJSON_USE_LONG_LONG is 0
  (they are set to null if they don't fit in a long)

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ArduinoJson 7.0.4

Changes

• Make JSON_STRING_SIZE(N) return N+1 to fix third-party code (issue #2054)

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ArduinoJson 7.0.3

Changes

• Improve error messages when using char or char* (issue #2043)
• Reduce stack consumption (issue #2046)
• Fix compatibility with GCC 4.8 (issue #2045)

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