From 200b269505be184663b3ce4d2968bd1c0f487f66 Mon Sep 17 00:00:00 2001
From: Keith Wiley <kwiley@keithwiley.com>
Date: Fri, 9 Apr 2021 00:27:25 -0700
Subject: [PATCH] Made GPVTG parse cleanly even if sentence is empty.

---
 micropyGPS.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/micropyGPS.py b/micropyGPS.py
index f8947f6..1d8b796 100644
--- a/micropyGPS.py
+++ b/micropyGPS.py
@@ -333,8 +333,8 @@ class MicropyGPS(object):
     def gpvtg(self):
         """Parse Track Made Good and Ground Speed (VTG) Sentence. Updates speed and course"""
         try:
-            course = float(self.gps_segments[1])
-            spd_knt = float(self.gps_segments[5])
+            course = float(self.gps_segments[1]) if self.gps_segments[1] else 0.0
+            spd_knt = float(self.gps_segments[5]) if self.gps_segments[5] else 0.0
         except ValueError:
             return False