Error running example ArduinoJson

Question

I am having trouble running a example from https://github.com/bblanchon/ArduinoJson

I already installed the library and ran a simple example.

/*
* Arduino JSON library - Parser Example
* Benoit Blanchon 2014 - MIT License
*/

#include <JsonParser.h>

using namespace ArduinoJson::Parser;

void setup()
{
    Serial.begin(9600);

    char json [] = "{\"sensor\":\"gps\",\"time\":1351824120,\"data\":[48.756080,2.302038]}";
    JsonParser<16> parser;
    JsonObject root = parser.parse(json);

    if (!root.success())
    {
        Serial.println("JsonParser.parse() failed");
        return;
    }

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

    Serial.println(sensor);
    Serial.println(time);
    Serial.println(latitude, 6);
    Serial.println(longitude, 6);
}

void loop()
{
}

But I am getting this error:

JsonParserExample:8: error: 'ArduinoJson' has not been declared
JsonParserExample:8: error: 'Parser' is not a namespace-name
JsonParserExample:8: error: expected namespace-name before ';' token
JsonParserExample.ino: In function 'void setup()':
JsonParserExample:18: error: 'JsonObject' was not declared in this scope
JsonParserExample:18: error: expected `;' before 'root'
JsonParserExample:20: error: 'root' was not declared in this scope
JsonParserExample:26: error: 'root' was not declared in this scope

There seems to be a problem with the namespace but I can't find it..

frarugi87 · Accepted Answer · 2014-08-01 10:11:11Z

2

I tried downloading it and it works. I'm using Arduino IDE 1.0.5 r2.

Did you correctly "install" the library? I mean

Download the archive from github (e.g. by clicking "Download ZIP", on the right)
Extract the content to the "libraries" folder inside the sketch folder
Rename the folder in "ArduinoJson"
Start Arduino IDE

At the third point you should have the files

<your sketch dir>\libraries\ArduinoJson\ArduinoJson.sln
<your sketch dir>\libraries\ArduinoJson\CHANGELOG.md
<your sketch dir>\libraries\ArduinoJson\JsonParser\JsonParser.vcxproj
and so on

If you did everything in the correct way in Arduino IDE you should see, under File->Examples, the ArduinoJson folder and, inside, two examples.

answered Aug 1, 2014 at 10:11

frarugi87

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1 Comment

Daniel Rojas Over a year ago

Thanks a lot men. I had to add the library using Sketch -> Import Library -> Add Library. Now it works.

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