Tasmota/lib/ArduinoJson-5.13.4/examples/JsonGeneratorExample/JsonGeneratorExample.ino

82 lines
2.3 KiB
C++

// ArduinoJson - arduinojson.org
// Copyright Benoit Blanchon 2014-2018
// MIT License
//
// This example shows how to generate a JSON document with ArduinoJson.
#include <ArduinoJson.h>
void setup() {
// Initialize Serial port
Serial.begin(9600);
while (!Serial) continue;
// Memory pool for JSON object tree.
//
// Inside the brackets, 200 is the size of the pool in bytes.
// Don't forget to change this value to match your JSON document.
// Use arduinojson.org/assistant to compute the capacity.
StaticJsonBuffer<200> jsonBuffer;
// StaticJsonBuffer allocates memory on the stack, it can be
// replaced by DynamicJsonBuffer which allocates in the heap.
//
// DynamicJsonBuffer jsonBuffer(200);
// Create the root of the object tree.
//
// It's a reference to the JsonObject, the actual bytes are inside the
// JsonBuffer with all the other nodes of the object tree.
// Memory is freed when jsonBuffer goes out of scope.
JsonObject& root = jsonBuffer.createObject();
// Add values in the object
//
// Most of the time, you can rely on the implicit casts.
// In other case, you can do root.set<long>("time", 1351824120);
root["sensor"] = "gps";
root["time"] = 1351824120;
// Add a nested array.
//
// It's also possible to create the array separately and add it to the
// JsonObject but it's less efficient.
JsonArray& data = root.createNestedArray("data");
data.add(48.756080);
data.add(2.302038);
root.printTo(Serial);
// This prints:
// {"sensor":"gps","time":1351824120,"data":[48.756080,2.302038]}
Serial.println();
root.prettyPrintTo(Serial);
// This prints:
// {
// "sensor": "gps",
// "time": 1351824120,
// "data": [
// 48.756080,
// 2.302038
// ]
// }
}
void loop() {
// not used in this example
}
// See also
// --------
//
// https://arduinojson.org/ contains the documentation for all the functions
// used above. It also includes an FAQ that will help you solve any
// serialization problem.
//
// The book "Mastering ArduinoJson" contains a tutorial on serialization.
// It begins with a simple example, like the one above, and then adds more
// features like serializing directly to a file or an HTTP request.
// Learn more at https://arduinojson.org/book/
// Use the coupon code TWENTY for a 20% discount ❤❤❤❤❤