From 53c42b050ad9a4af81e440253910c0ab8cfc6004 Mon Sep 17 00:00:00 2001
From: Carl Klemm <carl@uvos.xyz>
Date: Thu, 10 Jan 2019 19:43:25 +0100
Subject: [PATCH] W433DataReciver robustness changes

---
 W433DataReciver.cpp | 14 ++++++++++----
 W433DataReciver.h   |  1 +
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/W433DataReciver.cpp b/W433DataReciver.cpp
index c766c32..613a4ae 100644
--- a/W433DataReciver.cpp
+++ b/W433DataReciver.cpp
@@ -64,8 +64,12 @@ bool W433DataReciver::reciveSync(const uint16_t elapsedTime)
     }
     else 
 	{
-		if(syncCount > 5) error(ERR_SYNC_FAIL);
-		syncCount = 0;
+		if(syncCount > 4 && syncFailCount < 3) ++syncFailCount;
+		else 
+		{
+			syncCount = 0;
+			syncFailCount = 0;
+		}
 	}
     if(syncCount > 10) return true;
     else return false;
@@ -105,6 +109,8 @@ void W433DataReciver::setState(const uint8_t stateIn)
     state = stateIn;
     timesBufferIndex = 0;
     packetIndex = 0;
+	syncCount = 0;
+	syncFailCount = 0;
 }
 
 void W433DataReciver::interrupt()
@@ -130,9 +136,9 @@ void W433DataReciver::interrupt()
     }
     else if(state == LOOKING_FOR_SYNC_END) 
     {
-        if(elapsedTime > SYNC_TIME + 50)
+        if(elapsedTime > SYNC_TIME + SYNC_TIME_TOLERANCE)
         {
-            if(elapsedTime < LARGE_TIME + 50) 
+            if(elapsedTime < LARGE_TIME - LARGE_TIME_TOLERANCE) 
 			{
 				setState(LOOKING_FOR_SYNC);
 				error(ERR_NO_SYNC_END);
diff --git a/W433DataReciver.h b/W433DataReciver.h
index 4db8e5e..bc2c30b 100644
--- a/W433DataReciver.h
+++ b/W433DataReciver.h
@@ -60,6 +60,7 @@ private:
     void* const _userData;
     
     volatile uint8_t syncCount = 0;
+	volatile uint8_t syncFailCount = 0;
     volatile uint8_t state = 0;
     
     //private functions