From c3809c779e9626fb41d33e60964d6706af43b92e Mon Sep 17 00:00:00 2001
From: AvSquirrel <AvSquirrel@users.noreply.github.com>
Date: Sat, 27 Feb 2016 07:12:22 +0000
Subject: [PATCH] Add dump1090 heartbeat detection

---
 dump1090        | 2 +-
 main/traffic.go | 7 ++++++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/dump1090 b/dump1090
index 7eca0825..6a9c94fd 160000
--- a/dump1090
+++ b/dump1090
@@ -1 +1 @@
-Subproject commit 7eca082524fa135eb8efd78780f25739efb6a82c
+Subproject commit 6a9c94fd256a373a73fbc1d46f6c19d54525f2ea
diff --git a/main/traffic.go b/main/traffic.go
index 80610f82..a7b8928e 100644
--- a/main/traffic.go
+++ b/main/traffic.go
@@ -561,7 +561,12 @@ func esListen() {
 			var newTi *dump1090Data
 			err = json.Unmarshal([]byte(buf), &newTi)
 			if err != nil {
-				log.Printf("can't read ES traffic information: %s\n", err.Error())
+				log.Printf("can't read ES traffic information from %s: %s\n", buf, err.Error())
+				continue
+			}
+
+			if (newTi.Icao_addr & 0xFF000000) != 0 { //24-bit overflow is used to signal heartbeat
+				log.Printf("No traffic last 60 seconds. Heartbeat message from dump1090: %s\n", buf)
 				continue
 			}