I use connection.sendMessage() to send messages to my microcontroller, but get a “Reference Error” when I run the QML application on a PC. How do I avoid this error?

You can test for the presence of “connection” with this approach:

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Syntax Highlighter        onButtonPress: {
            if (typeof connection == 'undefined')
            {
                console.log("b=1")
            }
            else
            {
                connection.sendMessage("b=1")
            }
        }

The code above will use connection.sendMessage() when running on the display module but will use console.log() when running on the PC.

sarah2019-10-29T09:23:51-07:00