My bad

rpi/hardware/generic/serial_reader.py

@@ -38,8 +38,7 @@ class SerialReader:
             if line:
                 print("Generic method")
                 data = line.decode('utf-8', errors='ignore')
-                formatted_data = f'{{"uid": {data}}}'
-                self._notify(formatted_data)
+                self._notify(data)
 
 
 if __name__ == "__main__":

rpi/hardware/rfid/reader.py

@@ -19,7 +19,8 @@ class RfidReader(SerialReader):
                 hex_value = data[5:11].decode(errors='ignore')
                 try:
                     res = int(hex_value, 16)
-                    self._notify(str(res))
+                    formatted_res = f'{{"uid": {data}}}'
+                    self._notify(formatted_res)
                 except ValueError:
                     print("Invalid hex:", hex_value)
             else: