#include <ArduinoJson.h>

void setup() {
  // Initialize serial port
  Serial.begin(9600);
  while (!Serial) continue;

  // Allocate the JSON document
  //
  // Inside the brackets, 200 is the capacity of the memory pool in bytes.
  // Don't forget to change this value to match your JSON document.
  // Use arduinojson.org/v6/assistant to compute the capacity.
  StaticJsonDocument<200> doc;

  // StaticJsonDocument<N> allocates memory on the stack, it can be
  // replaced by DynamicJsonDocument which allocates in the heap.
  //
  // DynamicJsonDocument doc(200);

  // JSON input string.
  //
  // Using a char[], as shown here, enables the "zero-copy" mode. This mode uses
  // the minimal amount of memory because the JsonDocument stores pointers to
  // the input buffer.
  // If you use another type of input, ArduinoJson must copy the strings from
  // the input to the JsonDocument, so you need to increase the capacity of the
  // JsonDocument.
  //char json[] =
  //    "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";

  char json[] =
      "{\"totalEntries\":2,\"setpoint\":[15000,12500],\"duration\":[20,35]}";


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

  // Test if parsing succeeds.
  if (error) {
    Serial.print(F("deserializeJson() failed: "));
    Serial.println(error.f_str());
    return;
  }

  // Fetch values.
  //
  // Most of the time, you can rely on the implicit casts.
  // In other case, you can do doc["time"].as<long>();
  unsigned long sensor[100]; 
  unsigned long time[100]; 
  //int n = sizeof(doc["setpoint"])/4;
  int n = doc["totalEntries"];
  Serial.println(n);
 
  for(int i = 0;i<n;i++){
    sensor[i] = doc["setpoint"][i];
    time[i] = doc["duration"][i];
  }

  for(int i = 0; i < n; i++){
    Serial.print(sensor[i]);Serial.print(":");Serial.println(time[i]);
  }
}

void loop() {
  // not used in this example
}