diff --git a/cloud-functions/python/functions/consolidation.py b/cloud-functions/python/functions/consolidation.py
index 3bb64e4..7b068cd 100644
--- a/cloud-functions/python/functions/consolidation.py
+++ b/cloud-functions/python/functions/consolidation.py
@@ -24,6 +24,21 @@ def consolidation(request):
         Response object using `make_response`
         <https://flask.palletsprojects.com/en/1.1.x/api/#flask.make_response>.
     """
+
+    if request.method == 'OPTIONS':
+        headers = {
+            'Access-Control-Allow-Origin': '*',
+            'Access-Control-Allow-Methods': 'GET',
+            'Access-Control-Allow-Headers': 'Content-Type',
+            # 'Access-Control-Max-Age': '3600'
+        }
+
+        return ('', 204, headers)
+
+    headers = {
+        'Access-Control-Allow-Origin': '*'
+    }
+
     request_json = request.get_json(silent=True)
     request_args = request.args
 
diff --git a/scripts/serial_qc.py b/scripts/serial_qc.py
index 7b8daff..adec88c 100644
--- a/scripts/serial_qc.py
+++ b/scripts/serial_qc.py
@@ -1,36 +1,43 @@
 import serial
+import pandas as pd
 
-with serial.Serial('/dev/cu.usbserial-1420', 115200, timeout=1, parity=serial.PARITY_NONE) as ser:
-    x = ser.read()          # read one byte
-    s = ser.read(10)        # read up to ten bytes (timeout)
-    line = ser.readline()   # read a '\n' terminated line
-    print(x)
-    print(s)
-    print(line)
-    ser.write(b'B')
-    while True:
-        x = ser.read()
-        b = ser.read(100) 
-        line = ser.readline()
-        print(b)
-        if 'Buffer Completed' in b.decode("utf-8"):
-            ser.write(b'S')
+if __name__ == "__main__":
+
+    try:
+        with serial.Serial('/dev/cu.usbserial-1420', 115200, timeout=1, parity=serial.PARITY_NONE) as ser:
+            x = ser.read()          # read one byte
+            s = ser.read(10)        # read up to ten bytes (timeout)
+            line = ser.readline()   # read a '\n' terminated line
+            print(x)
+            print(s)
+            print(line)
+            ser.write(b'B')
             while True:
                 x = ser.read()
-                s = ser.read(100) 
+                b = ser.read(100) 
                 line = ser.readline()
-                print(s)
-                if 'Sample Completed' in s.decode("utf-8"):
-                    print("hi")
-                    ser.write(b'P')
+                print(b)
+                if 'Buffer Completed' in b.decode("utf-8"):
+                    ser.write(b'S')
                     while True:
                         x = ser.read()
-                        r = ser.read(100) 
+                        s = ser.read(100) 
                         line = ser.readline()
-                        print(r)
-                        if 'RESULT' in r.decode("utf-8") or 'REND' in r.decode('utf-8'):
-                            print(r)
+                        print(s)
+                        if 'Sample Completed' in s.decode("utf-8"):
+                            ser.write(b'P')
+                            while True:
+                                x = ser.read()
+                                r = ser.read(100) 
+                                line = ser.readline()
+                                print(r)
+                                if 'RESULT' in r.decode("utf-8") or 'REND' in r.decode('utf-8'):
+                                    print(r)
+                                    break
                             break
                     break
-            break
+    except serial.serialutil.SerialException:
+        print("connect device!")
+    except:
+        print("error!")
     
\ No newline at end of file