// ArduinoJson - arduinojson.org // Copyright Benoit Blanchon 2014-2018 // MIT License // // This example shows how to generate a JSON document with ArduinoJson. #include 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("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 ❤❤❤❤❤