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81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
// ArduinoJson - arduinojson.org
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// Copyright Benoit Blanchon 2014-2018
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// MIT License
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//
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// This example shows how to generate a JSON document with ArduinoJson.
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#include <ArduinoJson.h>
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void setup() {
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// Initialize Serial port
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Serial.begin(9600);
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while (!Serial) continue;
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// Memory pool for JSON object tree.
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//
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// Inside the brackets, 200 is the size of the pool in bytes.
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// Don't forget to change this value to match your JSON document.
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// Use arduinojson.org/assistant to compute the capacity.
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StaticJsonBuffer<200> jsonBuffer;
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// StaticJsonBuffer allocates memory on the stack, it can be
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// replaced by DynamicJsonBuffer which allocates in the heap.
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//
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// DynamicJsonBuffer jsonBuffer(200);
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// Create the root of the object tree.
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//
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// It's a reference to the JsonObject, the actual bytes are inside the
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// JsonBuffer with all the other nodes of the object tree.
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// Memory is freed when jsonBuffer goes out of scope.
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JsonObject& root = jsonBuffer.createObject();
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// Add values in the object
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//
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// Most of the time, you can rely on the implicit casts.
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// In other case, you can do root.set<long>("time", 1351824120);
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root["sensor"] = "gps";
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root["time"] = 1351824120;
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// Add a nested array.
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//
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// It's also possible to create the array separately and add it to the
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// JsonObject but it's less efficient.
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JsonArray& data = root.createNestedArray("data");
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data.add(48.756080);
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data.add(2.302038);
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root.printTo(Serial);
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// This prints:
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// {"sensor":"gps","time":1351824120,"data":[48.756080,2.302038]}
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Serial.println();
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root.prettyPrintTo(Serial);
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// This prints:
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// {
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// "sensor": "gps",
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// "time": 1351824120,
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// "data": [
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// 48.756080,
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// 2.302038
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// ]
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// }
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}
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void loop() {
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// not used in this example
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}
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// See also
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// --------
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//
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// The website arduinojson.org contains the documentation for all the functions
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// used above. It also includes an FAQ that will help you solve any
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// serialization problem.
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// Please check it out at: https://arduinojson.org/
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//
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// The book "Mastering ArduinoJson" contains a tutorial on serialization.
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// It begins with a simple example, like the one above, and then adds more
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// features like serializing directly to a file or an HTTP request.
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// Please check it out at: https://arduinojson.org/book/
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