Weighing scale message parsing occasionally runs into an error while starting

[mohith-sakthivel]

mohith@mohith-XPS-15:~/Documents/repos/ros-ws/ur5e_ws$ roslaunch sensor_interface start_sensors.launch 
... logging to /home/mohith/.ros/log/be8add16-bd26-11ec-ae28-1d27809b52ef/roslaunch-mohith-XPS-15-228117.log
Checking log directory for disk usage. This may take a while.
Press Ctrl-C to interrupt
Done checking log file disk usage. Usage is <1GB.

started roslaunch server http://mohith-XPS-15:46205/

SUMMARY
========

PARAMETERS
 * /cooking_pot/device: /dev/ttyUSB0
 * /rosdistro: noetic
 * /rosversion: 1.15.14

NODES
  /cooking_pot/
    force_torque_publisher (sensor_interface/force_torque_publish.py)
    weighing_scale (sensor_interface/weighing_scale.py)

ROS_MASTER_URI=http://localhost:11311

process[cooking_pot/weighing_scale-1]: started with pid [228135]
process[cooking_pot/force_torque_publisher-2]: started with pid [228136]
Traceback (most recent call last):
  File "/home/mohith/Documents/repos/ros-ws/ur5e_ws/src/sensor_interface/scripts/weighing_scale.py", line 41, in <module>
    read_weight(device=rospy.get_param('device'))
  File "/home/mohith/Documents/repos/ros-ws/ur5e_ws/src/sensor_interface/scripts/weighing_scale.py", line 18, in read_weight
    data = line.decode("utf-8")
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x81 in position 0: invalid start byte
[cooking_pot/weighing_scale-1] process has died [pid 228135, exit code 1, cmd /home/mohith/Documents/repos/ros-ws/ur5e_ws/src/sensor_interface/scripts/weighing_scale.py __name:=weighing_scale __log:=/home/mohith/.ros/log/be8add16-bd26-11ec-ae28-1d27809b52ef/cooking_pot-weighing_scale-1.log].
log file: /home/mohith/.ros/log/be8add16-bd26-11ec-ae28-1d27809b52ef/cooking_pot-weighing_scale-1*.log

Sometimes when the weighing scale is started, it runs into this error.