How can i change only the changing value in flutter signalr?

Question

I cannot setup the logic. I have three values. You know signalr only changing value comes. When i tried to change, every values change. Here is my code part=>

Text(a![0].name == 'PLC201.val'
                      ? '${a![0].value}': checkValue(a![0], a![0].name!)),
Text(a![0].name == 'PLC202.val'
                      ? '${a![0].value}': checkValue(a![0], a![0].name!)),
Text(a![0].name == 'PLC203.val'
                      ? '${a![0].value}': checkValue(a![0], a![0].name!)),
...

checkValue(SignalRModel a, String name) {
    var value;
    if(name == 'PLC201.val'){
      return value = a.value;
    } else if(name == 'PLC202.val'){
      return value = a.value;
    } else {
      return value = a.value;
    }
  }
...
SignalRModel {
  String? name;
  String? value;
  String? customCode;
}

This is my output from signalr => [{"Name":"PLC201.val","Value":"32,69906","CustomCode":"EGS"}]

Where is the problem? Is anyone help me to solve this? I only update the changing value.