Make sure that both OPC UA server and CV2 process

can run together.

oi-sensor/oi-sensor.py

@@ -17,6 +17,8 @@ import asyncio
 import logging
 from asyncua import Server
 
+SLEEP_DURATION = 10e-3 # 10 milliseconds
+
 def nothing(x):
     # any operation
     pass
@@ -52,6 +54,10 @@ async def main():
     async with server:
 
         while True:
+            # script runs concurrently OPC UA server and openCV optical shape
+            # recognition. Thus give (roughly) some CPU time so both can work together.
+            await asyncio.sleep(SLEEP_DURATION)
+
             # read and process camera 
             _, frame = cap.read()
             hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)