Leo at 22:46, 26 July 2020

2020-07-26T22:46:25Z

← Older revision		Revision as of 22:46, 26 July 2020
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	* Project Website: https://arduinojson.org/		* Project Website: https://arduinojson.org/


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Leo: Created page with "ArduinoJson is an Arduino library that makes it easier to parse and generate JSON output. This is useful to save multiple parameters into a config file in SPIFFS or to generat..."

2020-07-26T18:02:02Z

Created page with "ArduinoJson is an Arduino library that makes it easier to parse and generate JSON output. This is useful to save multiple parameters into a config file in SPIFFS or to generat..."

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ArduinoJson is an Arduino library that makes it easier to parse and generate JSON output. This is useful to save multiple parameters into a config file in SPIFFS or to generate or parse MQTT messages.

== Usage ==
Install the ArduinoJson library in the Arduino library manager. Be aware that the latest version of ArduinoJson is version 6 and is not compatible with version 5.

=== AdrduinoJson 5 ===
Include the header :
{{Highlight
| code = #include <ArduinoJson.h>
| lang = c
}}
To generate JSON output, create a new <code>JsonObject</code> and use it like a dictionary. Use <code>printTo()</code> to generate the JSON output.
{{Highlight
| code = DynamicJsonBuffer jsonBuffer;
JsonObject& json = jsonBuffer.createObject();

# You can specify values with various types. Eg. char* or literal strings
json["name"] = sensor_name;
json["command"] = "push";

# Floats and ints
json["measurement_f"] = 12.2;
json["measurement_i"] = 12;

# Boolean
json["measurement_b"] = true;

# Convert into a JSON message as char array
char payload[256];
json.printTo(payload);
| lang = terminal
}}
To parse JSON data:
{{Highlight
| code = DynamicJsonBuffer jsonBuffer;
JsonObject& json = jsonBuffer.parseObject(jsonpayload);

// Copy out the strings or do parsing as necessary.
if (json.success()) {
strcpy(mqtt_server, json["mqtt_server"]);
mqtt_port = atoi(json["mqtt_port"])
}
| lang = c
}}

== See Also ==

* Project Website: https://arduinojson.org/

ArduinoJson - Revision history

Leo at 22:46, 26 July 2020

Leo: Created page with "ArduinoJson is an Arduino library that makes it easier to parse and generate JSON output. This is useful to save multiple parameters into a config file in SPIFFS or to generat..."