Update gps_client.py add 1 second timeout

gps_client.py

@@ -9,11 +9,14 @@ run this way: python3 example1.py.txt
 # this client is for the CubeSatSim Lite which does not have a Pico microcontroller
 
 import gps               # the gpsd interface module
+import time
 
 session = gps.gps(mode=gps.WATCH_ENABLE)
 
+start = time.perf_timer()
+
 try:
-    while 0 == session.read():
+    while session.read() == 0 and ((time.perf_timer(0 - start) < 1):
         print(gps.MODE_SET)
         print(session.valid)
         if not (gps.MODE_SET & session.valid):