The argument type 'RxString' can't be assigned to the parameter type 'String'

I try to use the GetX framework in flutter for my project. but it shows the Error regarding RxString. whenever I try to use the Obx method to call the controller object inside a text widget or a other String parameter widget it shows the error

The argument type 'RxString' can't be assigned to the parameter type 'String'

this is my controller class

var qrValue = "waiting".obs;

socket.on('event', (data) 
{
    var qr = data['final'];
    qrValue.value = qr;
    print(qrValue);
 }

this want to pass the data to generate the qrcode

Obx(() => QrImage(
data: _controller.qrValue,
version: QrVersions.auto,
size: 200.0,
 ),
 )),

when i pass the qrvalue to the argument it show the error

The argument type ‘RxString’ can’t be assigned to the parameter type
‘String’

>Solution :

You are passing directly the Rx to the data property of QrImage. You need to pass the value of the Rx:

data: _controller.qrValue.value,