class BluetoothDevice { String? name; String? address; int? type; bool? connected; BluetoothDevice(); factory BluetoothDevice.fromJson(Map json) { return BluetoothDevice() ..name = json['name'] ..address = json['address'] ..type = json['type'] ..connected = json['connected']; } Map toJson() { return { 'name': name, 'address': address, 'type': type, 'connected': connected, }; } }