Breaking Changes in ArduinoJson 6.0

Hey Folks,

Got a quick update for you. If you are handling JSON with any Arduino related project and are using the library ArduinoJson to make your life easier, you may run into a problem with tutorials written previously to now (Including some of ours) where your code wouldn't compile with errors related to declaration of jsonBuffer.

Don't worry, we have the solution for you.

ArduinoJsonversion 6.0 was recently released, and it included a breaking change which is most likely the cause to JSON related problems.

In the latest version, the concept of JsonBuffer has been replaced with the concept of JsonDocument. Previously, you could create a JSON object like this:

StaticJsonBuffer<

With the new changes, here's how you wpuld achieve the same thing:

StaticJsonDocument<

In the previous version of ArduinoJson, you would use the printTo() method to serialize json into a string, eg:

data

Now, you'll need to use the new serializeJson function:

serializeJson(data, dataStr);

For more information about other changes in ArduinoJson 6.0, check out this article.