From 57e8947218e301be8a229e8746ec25f108d9b4a1 Mon Sep 17 00:00:00 2001
From: Marcelo Aquino <mapnull@gmail.com>
Date: Wed, 11 Feb 2015 11:42:07 -0200
Subject: [PATCH] Write parentNodeId to eeprom only when differ

---
 libraries/MySensors/MySensor.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/libraries/MySensors/MySensor.cpp b/libraries/MySensors/MySensor.cpp
index a2a63b5..1b0cf41 100755
--- a/libraries/MySensors/MySensor.cpp
+++ b/libraries/MySensors/MySensor.cpp
@@ -51,9 +51,11 @@ void MySensor::begin(void (*_msgCallback)(const MyMessage &), uint8_t _nodeId, b
 	}
 
 	if (_parentNodeId != AUTO) {
-		nc.parentNodeId = _parentNodeId;
-		// Save static parent id in eeprom
-		eeprom_write_byte((uint8_t*)EEPROM_PARENT_NODE_ID_ADDRESS, _parentNodeId);
+		if (_parentNodeId != nc.parentNodeId) {
+			nc.parentNodeId = _parentNodeId;
+			// Save static parent id in eeprom
+			eeprom_write_byte((uint8_t*)EEPROM_PARENT_NODE_ID_ADDRESS, _parentNodeId);
+		}
 		autoFindParent = false;
 	} else {
 		autoFindParent = true;