error handling and cors in api

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
 

scripts/serial_qc.py

@@ -1,6 +1,10 @@
 import serial
+import pandas as pd
 
-with serial.Serial('/dev/cu.usbserial-1420', 115200, timeout=1, parity=serial.PARITY_NONE) as ser:
+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
@@ -21,7 +25,6 @@ with serial.Serial('/dev/cu.usbserial-1420', 115200, timeout=1, parity=serial.PA
                         line = ser.readline()
                         print(s)
                         if 'Sample Completed' in s.decode("utf-8"):
-                    print("hi")
                             ser.write(b'P')
                             while True:
                                 x = ser.read()
@@ -33,4 +36,8 @@ with serial.Serial('/dev/cu.usbserial-1420', 115200, timeout=1, parity=serial.PA
                                     break
                             break
                     break
+    except serial.serialutil.SerialException:
+        print("connect device!")
+    except:
+        print("error!")