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📟 JSON library for Arduino and embedded C++. Simple and efficient.

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ArduinoJson is a C++ JSON library for Arduino and IoT (Internet Of Things).




Here is a program that parses a JSON document with ArduinoJson.

char json[] = "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";

DynamicJsonDocument doc(1024); deserializeJson(doc, json);

const char* sensor = doc["sensor"]; long time = doc["time"]; double latitude = doc["data"][0]; double longitude = doc["data"][1];

See the tutorial on


Here is a program that generates a JSON document with ArduinoJson:

DynamicJsonDocument doc(1024);

doc["sensor"] = "gps"; doc["time"] = 1351824120; doc["data"][0] = 48.756080; doc["data"][1] = 2.302038;

serializeJson(doc, Serial); // This prints: // {"sensor":"gps","time":1351824120,"data":[48.756080,2.302038]}

See the tutorial on

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