We are not talking more about asynchronous functions here, if you have questions ask our Google group and check the JavaScript section. Now we continue developing the application.

=> Press on the Read button and bring the Show Event tab, edit .onPressed event, and insert the following code. Note that we are missing many error checking for simplification.

console.log('handle ReadButtonPress');
var textBuildingControl = TcHmi.Controls.get('TcHmiTextbox_Building');
var textStreetControl = TcHmi.Controls.get('TcHmiTextbox_Street');
var textStateControl = TcHmi.Controls.get('TcHmiTextbox_State');
var textCountryControl = TcHmi.Controls.get('TcHmiTextbox_Country');
var comboboxControl = TcHmi.Controls.get('TcHmiCombobox');

async function handleReadButtonPress() {
  try {
	var locationSelected = comboboxControl.getSelectedIndex();
	switch(locationSelected)
	{
	case 0:
	{
		textBuildingControl.setText(globalObject['building no']);
		textStreetControl.setText(globalObject.street);
		textStateControl.setText(globalObject.state);
		textCountryControl.setText(globalObject.country);
		console.log(`globalObject = ${JSON.stringify(globalObject)}`);
	}
	break;	
	case 1:
	{ 
		var dataReadInternal = await ReadDataFromServer('%i%internalObject%/i%');	
		textBuildingControl.setText(dataReadInternal['building no']);
		textStreetControl.setText(dataReadInternal.street);
		textStateControl.setText(dataReadInternal.state);
		textCountryControl.setText(dataReadInternal.country);	
		console.log(`dataReadInternal = ${JSON.stringify(dataReadInternal)}`);		
	}
	break;
	case 2:
	{
		var dataReadServer = await ReadDataFromServer('%s%serverObject%/s%');	
		textBuildingControl.setText(dataReadServer['building no']);
		textStreetControl.setText(dataReadServer.street);
		textStateControl.setText(dataReadServer.state);
		textCountryControl.setText(dataReadServer.country);	
		console.log(`dataReadServer = ${JSON.stringify(dataReadServer)}`);	
	}
	break;
	default:
	{
	}
	break;	
	}
  }
  catch(error) {
    console.log(`error occured in handleReadButtonPress = ${error}`);
  }
}
handleReadButtonPress();

=> Do the same for the Write button and add the following code

console.log('handleWriteButtonPress');
var textBuildingControl = TcHmi.Controls.get('TcHmiTextbox_Building');
var textStreetControl = TcHmi.Controls.get('TcHmiTextbox_Street');
var textStateControl = TcHmi.Controls.get('TcHmiTextbox_State');
var textCountryControl = TcHmi.Controls.get('TcHmiTextbox_Country');
var comboboxControl = TcHmi.Controls.get('TcHmiCombobox');
var checkboxControl = TcHmi.Controls.get('TcHmiCheckbox');
async function handleWriteButtonPress() {
  try {
    var locationSelected = comboboxControl.getSelectedIndex();
    var textBuilding = textBuildingControl.getText();
    var textStreet = textStreetControl.getText();
    var textState = textStateControl.getText();
    var textCountry = textCountryControl.getText();
    var toogleState = checkboxControl.getToggleState() =='Active'? true : false;    
    switch(locationSelected)
    {
    case 0:
    {
       if(toogleState == false) {
        globalObject['building no'] = textBuilding;
        globalObject['street'] = textStreet;
        globalObject['state'] = textState;
        globalObject['country'] = textCountry;
        } else {
        globalObject = {};
        }
    }
    break;
    case 1:
    { 
        let address1 = {
            'building no': textBuilding,
            street: textStreet,
            state: textState,
            country: textCountry
            }; 
       if(toogleState == true) {
        address1 = {};
        }
        var dataWrite = await WriteDataToServer('%i%internalObject%/i%', address1);    
        console.log(`Write data to internal  dataWrite = ${dataWrite}`);
    }
    break;
    case 2:
    {
        let address2 = {
            'building no': textBuilding,
            street: textStreet,
            state: textState,
            country: textCountry
            }; 
       if(toogleState == true) {
        address2 = {};
        }      
        var dataWrite2 = await WriteDataToServer('%s%serverObject%/s%', address2);    
        console.log(`Write data to server dataWrite2 = ${dataWrite2}`);
    }
    break;
    default:
    {}
    break;
    }
  }
  catch(error) {
    console.log(`error occured in handleWriteButtonPress = ${error}`);
  }
}
handleWriteButtonPress();