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71 lines
1.9 KiB
C++
71 lines
1.9 KiB
C++
// Copyright Benoit Blanchon 2014-2017
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// MIT License
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//
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// Arduino JSON library
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// https://bblanchon.github.io/ArduinoJson/
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// If you like this project, please add a star!
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#include <ArduinoJson.h>
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void setup() {
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Serial.begin(9600);
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while (!Serial) {
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// wait serial port initialization
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}
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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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// If the JSON object is more complex, you need to increase that value.
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// See https://bblanchon.github.io/ArduinoJson/assistant/
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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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