#include <ArduinoJson.h>



void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");

  
  // Serialization
  // ----------------------------


  // ------  with  String  ------
  JsonDocument Serialize;
  String Serialize_str;

  Serialize["name"] = "john";
  Serialize["job"] = "chef";        // json: assigning "key" : "value" pairs

  Serialize["number"][0] = 99;      // assigning "array" of numbers
  for (int i = 1; i<=4; i++)
    Serialize["number"][i] = 99 + i;
  Serialize["number"].add(200);

  serializeJson (Serialize, Serialize_str);

  Serial.print("Ausgabe von Serialize_str: "); Serial.println(Serialize_str);

  // Serial.println(Serialize["name"]);     // Ausgabe eines JsonDocuments: not working !!
  String st = Serialize["name"];
  Serial.print("Ausgabe von Serialize Name: "); Serial.println(st);

  Serialize["job"] = "worker";
  const char* j = Serialize["job"];
  Serial.println(j);
  Serialize["job"] = "everything";
  String s = Serialize["job"];
  Serial.println(s);
  // const chars = Serialize["job"];
  // j = "everything";




  // ------  with  char[]  ------
  JsonDocument jd;
  char jd_arr[100];
  jd["a"] = 99;
  jd["b"] = 100;

  for (int i = 0; i<5; i++)
    jd["number"].add(1000+i);

  serializeJson (jd, jd_arr);

  Serial.println(jd_arr);

  jd["a"] = 999;
  jd["b"] = 1000;

  float f = 666.66;
  jd["a"] = f;

  serializeJson (jd, jd_arr);
  Serial.println(jd_arr);
  Serial.println(f);



  // De-Serialization
  // ----------------------------
  // char input[MAX_INPUT_LENGTH];


  // ------  with  char[]  ------
  char jsonChar[] = "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";
  JsonDocument jdoc;


  //  deserializeJson (jdoc, jsonChar);   // DeSerilization-Error only here availaable!
  DeserializationError error = deserializeJson (jdoc, jsonChar);

  if (error) {
    Serial.print("deserializeJson() returned ");
    Serial.println(error.c_str());
    return;
  }
  else
  {
      String sensor =  jdoc["sensor"];

      Serial.println("Ausgabe der Daten:");
      Serial.println(sensor);
      
      // Serial.println(jdoc["sensor"]);

      Serial.println(jsonChar);
  }

  DynamicJsonDocument doc(1024);
  DeserializationError err = deserializeJson(doc, "!!NOT JSON!!");
  if (err) {
      Serial.print(F("deserializeJson() failed: "));
      Serial.println(err.c_str());
  };



}





void loop() {

}