API Reference

JsonObject::printTo()

Description

Serializes the JsonObject to create a minified JSON document.

If you want a prettified JSON document, use JsonObject::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 an std::string.

Return value

The number of bytes written.

Example

StaticJsonBuffer<200> jsonBuffer;
JsonObject& object = jsonBuffer.createObject();
object["hello"] = "world";
object.printTo(Serial);

will write the following string to the serial port:

{"hello":"world"}

See also