ArduinoJson/extras/scripts/wandbox/JsonParserExample.cpp

// ArduinoJson - https://arduinojson.org
// Copyright © 2014-2025, Benoit BLANCHON
// MIT License
//
// This example shows how to deserialize a JSON document with ArduinoJson.

#include <iostream>
#include "ArduinoJson.h"

int main() {
  // Allocate the JSON document
  JsonDocument doc;

  // JSON input string
  const char* json =
      "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";

  // Deserialize the JSON document
  DeserializationError error = deserializeJson(doc, json);

  // Test if parsing succeeds
  if (error) {
    std::cerr << "deserializeJson() failed: " << error.c_str() << std::endl;
    return 1;
  }

  // Fetch the values
  //
  // Most of the time, you can rely on the implicit casts.
  // In other case, you can do doc["time"].as<long>();
  const char* sensor = doc["sensor"];
  long time = doc["time"];
  double latitude = doc["data"][0];
  double longitude = doc["data"][1];

  // Print the values
  std::cout << sensor << std::endl;
  std::cout << time << std::endl;
  std::cout << latitude << std::endl;
  std::cout << longitude << std::endl;

  return 0;
}