Getting nested JSON float values

you can play with this for a start

(or post a short version of the json data as text)

JSONArray values;

void setup() {

  values = loadJSONArray("new.json");

  for (int i = 0; i < values.size(); i++) {

    JSONObject animal = values.getJSONObject(i); 

    JSONArray values2 = animal.getJSONArray("bboxes");

    JSONArray values3 = values2.getJSONArray(0);



    float id = values3.getFloat(0);


    println( id );
  }
}
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