It is my understanding that you want to establish a connection and you want to get the feedback whether the connection is successful or not. The following solution will help you to achieve this:
1. Create a private property or member variable for App class to denote a connection flag and set it once Arduino object creation is complete.
properties (Access = private)
IsConnected = false % Initially set to false to denote no connection
end
2. Create the Arduino object in try/catch block and perform digital operation in try/catch itself. If something is wrong with the connection, the Arduino object creation itself will error out and will go to the catch statement and the digital operation will double check the Arduino object connection.
function ConnectButtonPushed(app, event)
try
a = arduino;
app.IsConnected = true;
%digital operation
catch
app.IsConnected = false;
%digital operation
end
end
Refer to the MATLAB App Designer documentation for more information on how to use properties in app class.
