From c99f6e6c32914a947c426d3e17e225e8c8564195 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Diego=20Elio=20Petten=C3=B2?= <flameeyes@flameeyes.com>
Date: Sun, 8 Sep 2019 20:12:13 +0100
Subject: freestyle devices: don't error out if there are no readings.

The multi-record format returns "Log Empty" if there's no entry in the
device, catch that.
---
 glucometerutils/support/freestyle.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/glucometerutils/support/freestyle.py b/glucometerutils/support/freestyle.py
index 3c337f6..5b441ff 100644
--- a/glucometerutils/support/freestyle.py
+++ b/glucometerutils/support/freestyle.py
@@ -275,6 +275,10 @@ class FreeStyleHidDevice(hiddevice.HidDevice):
              in the record file.
         """
         message = self._send_text_command(command)
+        logging.debug('Received multirecord message:\n%s', message)
+        if message == "Log Empty\r\n":
+            return ()
+
         match = _MULTIRECORDS_FORMAT.search(message)
         if not match:
             raise exceptions.InvalidResponse(message)
-- 
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