API Reference

JsonArray::printTo()

Description

Serializes the JsonArray to create a minified JSON document.

If you want a pretty JSON with spaces and line breaks, use JsonArray::prettyPrintTo()

Signatures

size_t printTo(char* buffer, size_t size) const;
size_t printTo(char buffer[size]) const;
size_t printTo(Print &) const;
size_t printTo(String &) const;
size_t printTo(std::string &) const;

Arguments

The destination where the JSON document should be written. It can be either:

  • a buffer with specified size (the size includes the zero-terminator),
  • an implementation of Print (like Serial, EthernetClient…),
  • a String or std::string.

Return value

The number of bytes written.

Example

StaticJsonBuffer<200> jsonBuffer;
JsonArray& array = jsonBuffer.createArray();
array.add("hello");
array.add("world");
array.printTo(Serial);

will write the following string to the serial port:

["hello","world"]

See also