API Reference | ArduinoJson 6

ArduinoJson 7 has just been released. See what's new.

This is the detailed documentation of every class and function of the ArduinoJson library. Some parts have been simplified to be easier to understand, so if you look at the source code, you might see some differences.

Entities

JsonArray: A reference to a JSON array in a JsonDocument

JsonObject: A reference to a JSON object in a JsonDocument

JsonVariant: A reference to a JSON value (array, object, integer…) in a JsonDocument

JsonDocument: Owns the memory for JsonArray, JsonObject and JsonVariant

JSON serialization / deserialization

deserializeJson(): Deserialize a JSON document into a JsonDocument.

serializeJson(): Serializes a JsonDocument into a minified JSON document

serializeJsonPretty(): Serializes a JsonDocument into a prettyfied JSON document

measureJson(): Computes the size of the document that serializeJson() produces

measureJsonPretty(): Computes the size of the document that serializeJsonPretty() produces

MessagePack serialization / deserialization

deserializeMsgPack(): Deserialize a MessagePack document into a JsonDocument

serializeMsgPack(): Serializes a JsonDocument into a MessagePack document

measureMsgPack(): Computes the size of the document that serializeMsgPack() produces

Misc

ARDUINOJSON_VERSION: Tells which version of ArduinoJson is installed

Compile time configuration: Settings to configure the library

copyArray(): Copies values between a JsonArray and a regular array.

serialized(): Allows inserting preformatted pieces of JSON or MsgPack in a document