diff --git a/scripts/auto_check_led.py b/scripts/auto_check_led.py
index d3ba527..cc2339c 100644
--- a/scripts/auto_check_led.py
+++ b/scripts/auto_check_led.py
@@ -6,6 +6,7 @@ import math
 from tqdm import tqdm
 import re
 import sys
+import time
 
 class Device:
     def __init__(self, accuracy, precision, port, baud_rate):
@@ -26,6 +27,9 @@ def perform_hpos_test(repeat_no, solution, df):
             raise FileNotFoundError(f"Port {port} not found.")
         
         with serial.Serial(port, baud_rate, timeout=1, parity=serial.PARITY_NONE) as ser:
+            x = ser.read()
+            s = ser.read(10)
+            line = ser.readline()
 
             ser.write(b'B')
             while True: