Send Data from Lua Script to UI in WebView Driver

[mojtabavi]

How Can I send Data from Lua Script to UI in WebView Driver? I read the document and checked the JS Demo Driver code but did not understand how to do it

[EldonRGreenwood]

@mojtabavi for the HTML/JS application to receive information from the Lua driver, you need to do the following:

Variable Method:

• Lua driver creates a variable using C4:AddVariable - see https://control4.github.io/docs-driverworks-api/#addvariable
• HTML/JS app subscribes to variable using C4.subscribeToVariable - see https://control4.github.io/docs-driverworks-proxyprotocol/#c4-subscribetovariable
• Your Lua driver code will write the value to the variable using C4:SetVariable
• Your HTML JS application receives and handles the variable changed event and data using the onVariable callback

DataToUI method:

• HTML/JS app subscribes to DataToUI messages using C4.subscribeToDataToUi - see https://control4.github.io/docs-driverworks-proxyprotocol/#c4-subscribetodatatoui
• Your Lua driver code will send the DataToUi message using C4:SendDataToUI - see https://control4.github.io/docs-driverworks-api/#senddatatoui
• Your HTML JS application receives and handles the variable changed event and data using the onDataToUi callback

A sample application showing these interactions is available at https://github.com/control4/docs-driverworks/tree/master/JS%20Demo%20Driver

I hope that this information is helpful, -Eldon