From 74deb2b95cc920921764e2c8ac9dc33a446fc1d8 Mon Sep 17 00:00:00 2001
From: Klaus K Wilting <Klaus.K.Wilting@deutschebahn.com>
Date: Sun, 27 Jan 2019 21:20:09 +0100
Subject: [PATCH] display.cpp: do not show SAT if no NMEA data seen

---
 src/display.cpp | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/src/display.cpp b/src/display.cpp
index b3a3464d..f52286ec 100644
--- a/src/display.cpp
+++ b/src/display.cpp
@@ -156,17 +156,20 @@ void refreshtheDisplay() {
 
 // update GPS status (line 2)
 #ifdef HAS_GPS
-    u8x8.setCursor(9, 2);
-    if (!gps.location.isValid()) // if no fix then display Sats value inverse
-    {
-      u8x8.setInverseFont(1);
-      u8x8.printf("Sats:%.2d", gps.satellites.value());
-      u8x8.setInverseFont(0);
-    } else
-      u8x8.printf("Sats:%.2d", gps.satellites.value());
+    // have we ever got valid gps data?
+    if (gps.passedChecksum() > 0) {
+      u8x8.setCursor(9, 2);
+      if (!gps.location.isValid()) // if no fix then display Sats value inverse
+      {
+        u8x8.setInverseFont(1);
+        u8x8.printf("Sats:%.2d", gps.satellites.value());
+        u8x8.setInverseFont(0);
+      } else
+        u8x8.printf("Sats:%.2d", gps.satellites.value());
+    }
 #endif
 
-      // update bluetooth counter + LoRa SF (line 3)
+    // update bluetooth counter + LoRa SF (line 3)
 #ifdef BLECOUNTER
     u8x8.setCursor(0, 3);
     if (cfg.blescan)