busier (& better) polling behavior

1 files changed, 6 insertions, 3 deletions

diff --git a/dexcom_reader/dexcom_dumper.py b/dexcom_reader/dexcom_dumper.py
index a7c2a67..3c60a88 100755
--- a/dexcom_reader/dexcom_dumper.py
+++ b/dexcom_reader/dexcom_dumper.py
@@ -160,10 +160,13 @@ def print_cgm_bg(now, r):
                 print '%s: %s %s' % (format_times(now, r.system_time), r.glucose, r.trend_arrow)
         stdout.flush()
 
+MAX_POLL_WAIT_SECONDS = 5
+MIN_POLL_WAIT_SECONDS = 1
+
 def poll_remote():
         (n, r) = remote_update('EGV_DATA')
         if n is None:
-                return 10
+                return MAX_POLL_WAIT_SECONDS
         else:
                 now = dr.ReadSystemTime()
                 if n == 0:
@@ -176,9 +179,9 @@ def poll_remote():
                                 except:
                                         traceback.print_exc()
                         next_reading = (r.system_time - now + timedelta(minutes=5, seconds=2)).total_seconds()
-                        return max(10, next_reading)
+                        return max(MIN_POLL_WAIT_SECONDS, min(MAX_POLL_WAIT_SECONDS, next_reading))
                 else:
-                        return 10
+                        return MAX_POLL_WAIT_SECONDS
 
 def poll():
         print_verbose('Started dexcom_dumper.')