diff --git a/main.py b/main.py
index 460d1f9..d46e646 100644
--- a/main.py
+++ b/main.py
@@ -2,30 +2,23 @@
 
 import sys
 import datetime
-import json
-import hashlib
-import requests
 import arrow
 import argparse
-import time
 
 from tconnectsync.api import TConnectApi
-from tconnectsync.api.common import ApiException
 from tconnectsync.process import process_time_range
+from tconnectsync.autoupdate import process_auto_update
 
 try:
     from tconnectsync.secret import (
         TCONNECT_EMAIL,
-        TCONNECT_PASSWORD,
-        PUMP_SERIAL_NUMBER,
-        TIMEZONE_NAME
+        TCONNECT_PASSWORD
     )
 except Exception:
-    print('Unable to import secret.py')
+    print('Unable to read secret.py')
     sys.exit(1)
 
 
-
 def parse_args():
     parser = argparse.ArgumentParser(description="Syncs bolus, basal, and IOB data from Tandem Diabetes t:connect to Nightscout.")
     parser.add_argument('--pretend', dest='pretend', action='store_const', const=True, default=False, help='Pretend mode: do not upload any data to Nightscout.')
@@ -39,9 +32,6 @@ def parse_args():
 def main():
     args = parse_args()
 
-    if args.pretend:
-        print("Pretend mode: will not write to Nightscout")
-
     if args.auto_update and (args.start_date or args.end_date):
         raise Exception('Auto-update cannot be used with start/end date')
 
@@ -58,50 +48,10 @@ def main():
     tconnect = TConnectApi(TCONNECT_EMAIL, TCONNECT_PASSWORD)
 
     if args.auto_update:
-        # Read from android api, find exact interval to cut down on API calls
-        # Refresh API token. If failure, die, have wrapper script re-run.
-
-        last_event_index = None
-        last_event_time = None
-        time_diffs = []
-        while True:
-            last_event = tconnect.android.last_event_uploaded(PUMP_SERIAL_NUMBER)
-            if not last_event_index or last_event['maxPumpEventIndex'] > last_event_index:
-                now = time.time()
-                print('New event index:', last_event['maxPumpEventIndex'], 'last:', last_event_index)
-
-                if args.pretend:
-                    print('Would update now')
-                else:
-                    added = process_time_range(tconnect, time_start, time_end, args.pretend)
-                    print('Added', added, 'items')
-
-                if last_event_index:
-                    time_diffs.append(now - last_event_time)
-                    print('Time diffs:', time_diffs)
-
-                last_event_index = last_event['maxPumpEventIndex']
-                last_event_time = now
-            else:
-                print('No event index change:', last_event['maxPumpEventIndex'])
-
-                if len(time_diffs) > 2:
-                    print('Sleeping 60 seconds after unexpected no index change')
-                    time.sleep(60)
-                    continue
-
-            sleep_secs = 60
-            if len(time_diffs) > 10:
-                time_diffs = time_diffs[1:]
-
-            if len(time_diffs) > 2:
-                sleep_secs = sum(time_diffs) / len(time_diffs)
-
-            # Sleep for a rolling average of time between updates
-            print('Sleeping for', sleep_secs, 'sec')
-            time.sleep(sleep_secs)
+        print("Starting auto-update between", time_start, "and", time_end, "(PRETEND)" if args.pretend else "")
+        process_auto_update(tconnect, time_start, time_end, args.pretend)
     else:
-        print("Processing data between", time_start, "and", time_end)
+        print("Processing data between", time_start, "and", time_end, "(PRETEND)" if args.pretend else "")
         added = process_time_range(tconnect, time_start, time_end, args.pretend)
         print("Added", added, "items")
 
diff --git a/tconnectsync/autoupdate.py b/tconnectsync/autoupdate.py
new file mode 100644
index 0000000..0f808ce
--- /dev/null
+++ b/tconnectsync/autoupdate.py
@@ -0,0 +1,52 @@
+import time
+
+from .process import process_time_range
+from .secret import PUMP_SERIAL_NUMBER
+
+"""
+Performs the auto-update functionality. Runs indefinitely in a loop
+until stopped (ctrl+c).
+"""
+def process_auto_update(tconnect, time_start, time_end, pretend):
+    # Read from android api, find exact interval to cut down on API calls
+    # Refresh API token. If failure, die, have wrapper script re-run.
+
+    last_event_index = None
+    last_event_time = None
+    time_diffs = []
+    while True:
+        last_event = tconnect.android.last_event_uploaded(PUMP_SERIAL_NUMBER)
+        if not last_event_index or last_event['maxPumpEventIndex'] > last_event_index:
+            now = time.time()
+            print('New event index:', last_event['maxPumpEventIndex'], 'last:', last_event_index)
+
+            if pretend:
+                print('Would update now')
+            else:
+                added = process_time_range(tconnect, time_start, time_end, pretend)
+                print('Added', added, 'items')
+
+            if last_event_index:
+                time_diffs.append(now - last_event_time)
+                print('Time diffs:', time_diffs)
+
+            last_event_index = last_event['maxPumpEventIndex']
+            last_event_time = now
+        else:
+            print('No event index change:', last_event['maxPumpEventIndex'])
+
+            if len(time_diffs) > 2:
+                print('Sleeping 60 seconds after unexpected no index change')
+                time.sleep(60)
+                continue
+
+        sleep_secs = 60
+        if len(time_diffs) > 10:
+            time_diffs = time_diffs[1:]
+
+        if len(time_diffs) > 2:
+            sleep_secs = sum(time_diffs) / len(time_diffs)
+
+        # Sleep for a rolling average of time between updates
+        print('Sleeping for', sleep_secs, 'sec')
+        time.sleep(sleep_secs)
\ No newline at end of file