diff --git a/MyConfig.h b/MyConfig.h
index ff8ba70..cf737a1 100644
--- a/MyConfig.h
+++ b/MyConfig.h
@@ -123,12 +123,6 @@
  */
 //#define MY_TRANSPORT_UPLINK_CHECK_DISABLED
 
-/**
-*@def MY_TRANSPORT_DONT_CARE_MODE
-*@brief If set, transport traffic is unmonitored and GW connection is optional
-*/
-//#define MY_TRANSPORT_DONT_CARE_MODE
-
 /**
  *@def MY_TRANSPORT_MAX_TX_FAILURES
  *@brief Set to override max. consecutive TX failures until SNP is initiated
@@ -167,6 +161,12 @@
  * @brief If enabled, library compatibility is checked during node registration. Incompatible libraries are unable to send sensor data.
  */
 #define MY_CORE_COMPATIBILITY_CHECK
+ 
+ /**
+ * @def MY_TRANSPORT_RELAX
+ * @brief If enabled, node enters main loop() even if transport / connection to GW is not established
+ */
+//#define MY_TRANSPORT_RELAX
 
 /**
  * @def MY_NODE_ID
@@ -855,6 +855,8 @@
 #define MY_IS_RFM69HW
 #define MY_PARENT_NODE_IS_STATIC
 #define MY_REGISTRATION_CONTROLLER
+#define MY_TRANSPORT_UPLINK_CHECK_DISABLED
+#define MY_TRANSPORT_RELAX
 #define MY_DEBUG_VERBOSE_RF24
 #define MY_TRANSPORT_SANITY_CHECK
 #define MY_RF24_IRQ_PIN
@@ -862,7 +864,6 @@
 #define MY_RX_MESSAGE_BUFFER_SIZE
 #define MY_NODE_LOCK_FEATURE
 #define MY_REPEATER_FEATURE
-#define MY_TRANSPORT_DONT_CARE_MODE
 #define MY_LINUX_SERIAL_GROUPNAME
 #define MY_IS_SERIAL_PTY
 #endif
diff --git a/MySensors.h b/MySensors.h
index 1e6414d..bb596cb 100644
--- a/MySensors.h
+++ b/MySensors.h
@@ -239,26 +239,8 @@
 	#endif
 #endif
 
-#if defined(MY_TRANSPORT_DONT_CARE_MODE) && !defined(MY_GATEWAY_FEATURE)
-	// enables transport don't care mode, i.e. transport link is not monitored and GW connection optional
-	#if !defined(MY_PARENT_NODE_ID) || MY_PARENT_NODE_ID==255
-		#error MY_TRANSPORT_DONT_CARE_MODE requires MY_PARENT_NODE_ID set
-	#endif
-	#if !defined(MY_PARENT_NODE_IS_STATIC)
-		#define MY_PARENT_NODE_IS_STATIC
-	#endif
-	#ifdef MY_REGISTRATION_FEATURE
-		#undef MY_REGISTRATION_FEATURE
-	#endif
-	#ifdef MY_TRANSPORT_SANITY_CHECK 
-		#undef MY_TRANSPORT_SANITY_CHECK
-	#endif
-	#ifndef MY_TRANSPORT_UPLINK_CHECK_DISABLED
-		#define MY_TRANSPORT_UPLINK_CHECK_DISABLED	
-	#endif
-	#ifdef MY_REGISTRATION_FEATURE
-		#undef MY_REGISTRATION_FEATURE
-	#endif
+#if defined(MY_TRANSPORT_DONT_CARE_MODE)
+	#error This directive is deprecated, use MY_TRANSPORT_RELAX instead!
 #endif
 
 
diff --git a/core/MyGatewayTransport.cpp b/core/MyGatewayTransport.cpp
index fcf2b53..c4aad27 100644
--- a/core/MyGatewayTransport.cpp
+++ b/core/MyGatewayTransport.cpp
@@ -24,8 +24,6 @@ extern bool transportSendRoute(MyMessage &message);
 // global variables
 extern MyMessage _msg;
 extern MyMessage _msgTmp;
-extern NodeConfig _nc;
-
 
 inline void gatewayTransportProcess() {
 	if (gatewayTransportAvailable()) {
@@ -38,7 +36,7 @@ inline void gatewayTransportProcess() {
 				_msgTmp = _msg;
 				mSetRequestAck(_msgTmp, false); // Reply without ack flag (otherwise we would end up in an eternal loop)
 				mSetAck(_msgTmp, true);
-				_msgTmp.sender = _nc.nodeId;
+				_msgTmp.sender = getNodeId();
 				_msgTmp.destination = _msg.sender;
 				gatewayTransportSend(_msgTmp);
 			}
diff --git a/core/MyOTAFirmwareUpdate.cpp b/core/MyOTAFirmwareUpdate.cpp
index af0338e..e9f286c 100644
--- a/core/MyOTAFirmwareUpdate.cpp
+++ b/core/MyOTAFirmwareUpdate.cpp
@@ -22,7 +22,6 @@
 // global variables
 extern MyMessage _msg;
 extern MyMessage _msgTmp;
-extern NodeConfig _nc;
 
 // local variables
 SPIFlash _flash(MY_OTA_FLASH_SS, MY_OTA_FLASH_JDECID);
diff --git a/core/MySensorsCore.cpp b/core/MySensorsCore.cpp
index 8586b2a..f84cfb5 100644
--- a/core/MySensorsCore.cpp
+++ b/core/MySensorsCore.cpp
@@ -6,7 +6,7 @@
  * network topology allowing messages to be routed to nodes.
  *
  * Created by Henrik Ekblad <henrik.ekblad@mysensors.org>
- * Copyright (C) 2013-2015 Sensnology AB
+ * Copyright (C) 2013-2016 Sensnology AB
  * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors
  *
  * Documentation: http://www.mysensors.org
@@ -24,18 +24,34 @@
 	#include <unistd.h>
 #endif
 
-ControllerConfig _cc;	// Configuration coming from controller
-NodeConfig _nc;			// Essential settings for node to work
+// message buffers
 MyMessage _msg;			// Buffer for incoming messages
 MyMessage _msgTmp;		// Buffer for temporary messages (acks and nonces among others)
 
-bool _nodeRegistered = false;
+// core configuration
+coreConfig_t coreConfig;
 
 #if defined(MY_DEBUG)
 	char _convBuf[MAX_PAYLOAD*2+1];
 #endif
 
-void (*_timeCallback)(unsigned long); // Callback for requested time messages
+// Callback for requested time messages
+void (*_timeCallback)(unsigned long);
+
+// Callback for transport=ok transition
+void _callbackTransportOk()
+{
+	if (!coreConfig.presentationSent) {
+		presentNode();
+		coreConfig.presentationSent = true;
+	}
+#if !defined(MY_GATEWAY_FEATURE)
+	if (!coreConfig.registrationRequested) {
+		_registerNode();
+		coreConfig.registrationRequested = true;
+	}
+#endif
+}
 
 void _process(void) {
 	hwWatchdogReset();
@@ -75,6 +91,7 @@ void _infiniteLoop(void) {
 }
 
 void _begin(void) {
+	// reset wdt
 	hwWatchdogReset();
 
 	if (preHwInit) {
@@ -83,11 +100,15 @@ void _begin(void) {
 
 	hwInit();
 
-	debug(PSTR("MCO:BGN:INIT " MY_NODE_TYPE ",CP=" MY_CAPABILITIES ",VER=" MYSENSORS_LIBRARY_VERSION "\n"));
+	CORE_DEBUG(PSTR("MCO:BGN:INIT " MY_NODE_TYPE ",CP=" MY_CAPABILITIES ",VER=" MYSENSORS_LIBRARY_VERSION "\n"));
 
+	// set defaults
+	coreConfig.presentationSent = false;
+	coreConfig.registrationRequested = false;
+	
 	// Call before() in sketch (if it exists)
 	if (before) {
-		debug(PSTR("MCO:BGN:BFR\n"));	// before callback
+		CORE_DEBUG(PSTR("MCO:BGN:BFR\n"));	// before callback
 		before();
 	}
 
@@ -99,7 +120,7 @@ void _begin(void) {
 
 	// Read latest received controller configuration from EEPROM
 	// Note: _cc.isMetric is bool, hence empty EEPROM (=0xFF) evaluates to true (default)
-	hwReadConfigBlock((void*)&_cc, (void*)EEPROM_CONTROLLER_CONFIG_ADDRESS, sizeof(ControllerConfig));
+	hwReadConfigBlock((void*)&coreConfig.controllerConfig, (void*)EEPROM_CONTROLLER_CONFIG_ADDRESS, sizeof(controllerConfig_t));
 
 	#if defined(MY_OTA_FIRMWARE_FEATURE)
 		// Read firmware config from EEPROM, i.e. type, version, CRC, blocks
@@ -109,42 +130,26 @@ void _begin(void) {
 	#if defined(MY_SENSOR_NETWORK)
 		// Save static parent id in eeprom (used by bootloader)
 		hwWriteConfig(EEPROM_PARENT_NODE_ID_ADDRESS, MY_PARENT_NODE_ID);
+		// Register for transport layer
+		transportRegisterTransportOkCallback(_callbackTransportOk);
+
+		// Initialise transport layer
 		transportInitialise();
-		while (!isTransportReady()) {
-			hwWatchdogReset();
-			transportProcess();
-			yield();
-		}
-	#endif
-
-
-
-	#ifdef MY_NODE_LOCK_FEATURE
-		// Check if node has been locked down
-		if (hwReadConfig(EEPROM_NODE_LOCK_COUNTER) == 0) {
-			// Node is locked, check if unlock pin is asserted, else hang the node
-			pinMode(MY_NODE_UNLOCK_PIN, INPUT_PULLUP);
-			// Make a short delay so we are sure any large external nets are fully pulled
-			unsigned long enter = hwMillis();
-			while (hwMillis() - enter < 2) {}
-			if (digitalRead(MY_NODE_UNLOCK_PIN) == 0) {
-				// Pin is grounded, reset lock counter
-				hwWriteConfig(EEPROM_NODE_LOCK_COUNTER, MY_NODE_LOCK_COUNTER_MAX);
-				// Disable pullup
-				pinMode(MY_NODE_UNLOCK_PIN, INPUT);
-				setIndication(INDICATION_ERR_LOCKED);
-				debug(PSTR("MCO:BGN:NODE UNLOCKED\n"));
-			} else {
-				// Disable pullup
-				pinMode(MY_NODE_UNLOCK_PIN, INPUT);
-				nodeLock("LDB"); //Locked during boot
+		
+		#if !defined(MY_TRANSPORT_RELAX)
+			// check if transport ready
+			while (!isTransportReady()) {
+				hwWatchdogReset();
+				transportProcess();
+				yield();
 			}
-		} else if (hwReadConfig(EEPROM_NODE_LOCK_COUNTER) == 0xFF) {
-			// Reset walue
-			hwWriteConfig(EEPROM_NODE_LOCK_COUNTER, MY_NODE_LOCK_COUNTER_MAX);
-		}
+		#else
+			CORE_DEBUG(PSTR("MCO:BGN:MTR\n"));	
+		#endif
 	#endif
-
+	
+	_checkNodeLock();
+	
 	#if defined(MY_GATEWAY_FEATURE)
 		#if defined(MY_INCLUSION_BUTTON_FEATURE)
 	    	inclusionInit();
@@ -153,46 +158,40 @@ void _begin(void) {
 	    // initialise the transport driver
 		if (!gatewayTransportInit()) {
 			setIndication(INDICATION_ERR_INIT_GWTRANSPORT);
-			debug(PSTR("!MCO:BGN:TSP FAIL\n"));
+			CORE_DEBUG(PSTR("!MCO:BGN:TSP FAIL\n"));
 			// Nothing more we can do
 			_infiniteLoop();
 		}
 	#endif
 
-	#if !defined(MY_GATEWAY_FEATURE)
-		presentNode();
-	#endif
-
-	// register node
-	_registerNode();
-
 	// Call sketch setup
 	if (setup) {
-		debug(PSTR("MCO:BGN:STP\n"));	// setup callback
+		CORE_DEBUG(PSTR("MCO:BGN:STP\n"));	// setup callback
 		setup();
 	}
 
-	debug(PSTR("MCO:BGN:INIT OK,ID=%d,PAR=%d,DIS=%d,REG=%d\n"), _nc.nodeId, _nc.parentNodeId, _nc.distance, _nodeRegistered);
+	CORE_DEBUG(PSTR("MCO:BGN:INIT OK,TSP=%d\n"), isTransportReady());
 
+	// reset wdt before handing over to loop
 	hwWatchdogReset();
 }
 
 
-void _registerNode(void) {
-	#if defined (MY_REGISTRATION_FEATURE) && !defined(MY_GATEWAY_FEATURE)
-		debug(PSTR("MCO:REG:REQ\n"));	// registration request
-		setIndication(INDICATION_REQ_REGISTRATION);
-		_nodeRegistered = MY_REGISTRATION_DEFAULT;
-		uint8_t counter = MY_REGISTRATION_RETRIES;
-		// only proceed if register response received or retries exceeded
-		do {
-			(void)_sendRoute(build(_msgTmp, GATEWAY_ADDRESS, NODE_SENSOR_ID, C_INTERNAL, I_REGISTRATION_REQUEST).set(MY_CORE_VERSION));
-		} while (!wait(2000, C_INTERNAL, I_REGISTRATION_RESPONSE) && counter--);
-
-	#else
-		_nodeRegistered = true;
-		debug(PSTR("MCO:REG:NOT NEEDED\n"));
-	#endif
+void _registerNode(void)
+{
+#if defined (MY_REGISTRATION_FEATURE) && !defined(MY_GATEWAY_FEATURE)
+	CORE_DEBUG(PSTR("MCO:REG:REQ\n"));	// registration request
+	setIndication(INDICATION_REQ_REGISTRATION);
+	coreConfig.registered = MY_REGISTRATION_DEFAULT;
+	uint8_t counter = MY_REGISTRATION_RETRIES;
+	// only proceed if register response received or retries exceeded
+	do {
+		(void)_sendRoute(build(_msgTmp, GATEWAY_ADDRESS, NODE_SENSOR_ID, C_INTERNAL, I_REGISTRATION_REQUEST).set(MY_CORE_VERSION));
+	} while (!wait(2000, C_INTERNAL, I_REGISTRATION_RESPONSE) && counter--);
+#else
+	coreConfig.registered = true;
+	CORE_DEBUG(PSTR("MCO:REG:NOT NEEDED\n"));
+#endif
 }
 
 void presentNode(void) {
@@ -223,7 +222,7 @@ void presentNode(void) {
 
 		// Send a configuration exchange request to controller
 		// Node sends parent node. Controller answers with latest node configuration
-		(void)_sendRoute(build(_msgTmp, GATEWAY_ADDRESS, NODE_SENSOR_ID, C_INTERNAL, I_CONFIG).set(_nc.parentNodeId));
+		(void)_sendRoute(build(_msgTmp, GATEWAY_ADDRESS, NODE_SENSOR_ID, C_INTERNAL, I_CONFIG).set(getParentNodeId()));
 
 		// Wait configuration reply.
 		(void)wait(2000, C_INTERNAL, I_CONFIG);
@@ -236,16 +235,35 @@ void presentNode(void) {
 }
 
 
-uint8_t getNodeId(void) {
-	return _nc.nodeId;
+uint8_t getNodeId(void)
+{
+#if defined(MY_SENSOR_NETWORK)
+	return transportGetNodeId();
+#else
+	return 0xFF;
+#endif
 }
 
-uint8_t getParentNodeId(void) {
-	return _nc.parentNodeId;
+uint8_t getParentNodeId(void)
+{
+#if defined(MY_SENSOR_NETWORK)
+	return transportGetParentNodeId();
+#else
+	return 0xFF;
+#endif
 }
 
-ControllerConfig getConfig(void) {
-	return _cc;
+uint8_t getDistanceGW(void)
+{
+#if defined(MY_SENSOR_NETWORK)
+	return transportGetDistanceGW();
+#else
+	return 0xFF;
+#endif
+}
+
+controllerConfig_t getConfig(void) {
+	return coreConfig.controllerConfig;
 }
 
 
@@ -254,7 +272,7 @@ bool _sendRoute(MyMessage &message) {
 		(void)message;
 	#endif
 	#if defined(MY_GATEWAY_FEATURE)
-		if (message.destination == _nc.nodeId) {
+		if (message.destination == getNodeId()) {
 			// This is a message sent from a sensor attached on the gateway node.
 			// Pass it directly to the gateway transport layer.
 			return gatewayTransportSend(message);
@@ -268,16 +286,16 @@ bool _sendRoute(MyMessage &message) {
 }
 
 bool send(MyMessage &message, const bool enableAck) {
-	message.sender = _nc.nodeId;
+	message.sender = getNodeId();
 	mSetCommand(message, C_SET);
 	mSetRequestAck(message, enableAck);
 
 	#if defined(MY_REGISTRATION_FEATURE) && !defined(MY_GATEWAY_FEATURE)
-		if (_nodeRegistered) {
+		if (coreConfig.registered) {
 			return _sendRoute(message);
 		}
 		else {
-			debug(PSTR("!MCO:SND:NODE NOT REG\n"));	// node not registered
+			CORE_DEBUG(PSTR("!MCO:SND:NODE NOT REG\n"));	// node not registered
 			return false;
 		}
 	#else
@@ -308,7 +326,7 @@ bool sendSketchInfo(const char *name, const char *version, const bool ack) {
 	if (name) {
 		result &= _sendRoute(build(_msgTmp, GATEWAY_ADDRESS, NODE_SENSOR_ID, C_INTERNAL, I_SKETCH_NAME, ack).set(name));
 	}
-  if (version) {
+	if (version) {
 		result &= _sendRoute(build(_msgTmp, GATEWAY_ADDRESS, NODE_SENSOR_ID, C_INTERNAL, I_SKETCH_VERSION, ack).set(version));
 	}
 	return result;
@@ -336,15 +354,15 @@ bool _processInternalMessages(void) {
 		}
 		else if (type == I_REGISTRATION_RESPONSE) {
 			#if defined (MY_REGISTRATION_FEATURE) && !defined(MY_GATEWAY_FEATURE)
-				_nodeRegistered = _msg.getBool();
+				coreConfig.registered = _msg.getBool();
 				setIndication(INDICATION_GOT_REGISTRATION);
-				debug(PSTR("MCO:PIM:NODE REG=%d\n"), _nodeRegistered);	// node registration
+				CORE_DEBUG(PSTR("MCO:PIM:NODE REG=%d\n"), coreConfig.registered);	// node registration
 			#endif
 		}
 		else if (type == I_CONFIG) {
 			// Pick up configuration from controller (currently only metric/imperial) and store it in eeprom if changed
-			_cc.isMetric = _msg.data[0] == 0x00 || _msg.data[0] == 'M'; // metric if null terminated or M
-			hwWriteConfig(EEPROM_CONTROLLER_CONFIG_ADDRESS, _cc.isMetric);
+			coreConfig.controllerConfig.isMetric = _msg.data[0] == 0x00 || _msg.data[0] == 'M'; // metric if null terminated or M
+			hwWriteConfigBlock((void*)&coreConfig.controllerConfig, (void*)EEPROM_CONTROLLER_CONFIG_ADDRESS, sizeof(controllerConfig_t));
 		}
 		else if (type == I_PRESENTATION) {
 			// Re-send node presentation to controller
@@ -377,7 +395,7 @@ bool _processInternalMessages(void) {
 					for (uint16_t cnt = 0; cnt < SIZE_ROUTES; cnt++) {
 						const uint8_t route = transportGetRoute(cnt);
 						if (route != BROADCAST_ADDRESS) {
-							debug(PSTR("MCO:PIM:ROUTE N=%d,R=%d\n"), cnt, route);
+							CORE_DEBUG(PSTR("MCO:PIM:ROUTE N=%d,R=%d\n"), cnt, route);
 							uint8_t outBuf[2] = { (uint8_t)cnt,route };
 							(void)_sendRoute(build(_msgTmp, GATEWAY_ADDRESS, NODE_SENSOR_ID, C_INTERNAL, I_DEBUG).set(outBuf, 2));
 							wait(200);
@@ -465,11 +483,11 @@ bool wait(const uint32_t waitingMS, const uint8_t cmd, const uint8_t msgtype) {
 }
 
 int8_t _sleep(const uint32_t sleepingMS, const bool smartSleep, const uint8_t interrupt1, const uint8_t mode1, const uint8_t interrupt2, const uint8_t mode2) {
-	debug(PSTR("MCO:SLP:MS=%lu,SMS=%d,I1=%d,M1=%d,I2=%d,M2=%d\n"), sleepingMS, smartSleep, interrupt1, mode1, interrupt2, mode2);
+	CORE_DEBUG(PSTR("MCO:SLP:MS=%lu,SMS=%d,I1=%d,M1=%d,I2=%d,M2=%d\n"), sleepingMS, smartSleep, interrupt1, mode1, interrupt2, mode2);
 	// OTA FW feature: do not sleep if FW update ongoing
 	#if defined(MY_OTA_FIRMWARE_FEATURE)
 		if (_fwUpdateOngoing) {
-			debug(PSTR("!MCO:SLP:FWUPD\n"));	// sleeping not possible, FW update ongoing
+			CORE_DEBUG(PSTR("!MCO:SLP:FWUPD\n"));	// sleeping not possible, FW update ongoing
 			wait(sleepingMS);
 			return MY_SLEEP_NOT_POSSIBLE;
 		}
@@ -482,7 +500,7 @@ int8_t _sleep(const uint32_t sleepingMS, const bool smartSleep, const uint8_t in
 		(void)interrupt2;
 		(void)mode2;
 
-		debug(PSTR("!MCO:SLP:REP\n"));	// sleeping not possible, repeater feature enabled
+		CORE_DEBUG(PSTR("!MCO:SLP:REP\n"));	// sleeping not possible, repeater feature enabled
 		wait(sleepingMS);
 		return MY_SLEEP_NOT_POSSIBLE;
 	#else
@@ -490,7 +508,7 @@ int8_t _sleep(const uint32_t sleepingMS, const bool smartSleep, const uint8_t in
 		#if defined(MY_SENSOR_NETWORK)
 			// Do not sleep if transport not ready
 			if (!isTransportReady()) {
-				debug(PSTR("!MCO:SLP:TNR\n"));	// sleeping not possible, transport not ready
+				CORE_DEBUG(PSTR("!MCO:SLP:TNR\n"));	// sleeping not possible, transport not ready
 				const uint32_t sleepEnterMS = hwMillis();
 				uint32_t sleepDeltaMS = 0;
 				while (!isTransportReady() && (sleepDeltaMS < sleepingTimeMS) && (sleepDeltaMS < MY_SLEEP_TRANSPORT_RECONNECT_TIMEOUT_MS)) {
@@ -501,7 +519,7 @@ int8_t _sleep(const uint32_t sleepingMS, const bool smartSleep, const uint8_t in
 				// sleep remainder
 				if (sleepDeltaMS < sleepingTimeMS) {
 					sleepingTimeMS -= sleepDeltaMS;		// calculate remaining sleeping time
-					debug(PSTR("MCO:SLP:MS=%lu\n"), sleepingTimeMS);
+					CORE_DEBUG(PSTR("MCO:SLP:MS=%lu\n"), sleepingTimeMS);
 				}
 				else {
 					// no sleeping time left
@@ -517,7 +535,7 @@ int8_t _sleep(const uint32_t sleepingMS, const bool smartSleep, const uint8_t in
 		}
 
 		#if defined(MY_SENSOR_NETWORK)
-			debug(PSTR("MCO:SLP:TPD\n"));	// sleep, power down transport
+			CORE_DEBUG(PSTR("MCO:SLP:TPD\n"));	// sleep, power down transport
 			transportPowerDown();
 		#endif
 
@@ -539,7 +557,7 @@ int8_t _sleep(const uint32_t sleepingMS, const bool smartSleep, const uint8_t in
 		}
 
 		setIndication(INDICATION_WAKEUP);
-		debug(PSTR("MCO:SLP:WUP=%d\n"), result);	// sleep wake-up
+		CORE_DEBUG(PSTR("MCO:SLP:WUP=%d\n"), result);	// sleep wake-up
 		return result;
 	#endif
 }
@@ -574,22 +592,57 @@ int8_t smartSleep(const uint8_t interrupt1, const uint8_t mode1, const uint8_t i
 }
 
 
+
+void _nodeLock(const char* str)
+{
 #ifdef MY_NODE_LOCK_FEATURE
-void nodeLock(const char* str) {
 	// Make sure EEPROM is updated to locked status
 	hwWriteConfig(EEPROM_NODE_LOCK_COUNTER, 0);
 	while (1) {
 		setIndication(INDICATION_ERR_LOCKED);
-		debug(PSTR("MCO:NLK:NODE LOCKED. TO UNLOCK, GND PIN %d AND RESET\n"), MY_NODE_UNLOCK_PIN);
+		CORE_DEBUG(PSTR("MCO:NLK:NODE LOCKED. TO UNLOCK, GND PIN %d AND RESET\n"), MY_NODE_UNLOCK_PIN);
 		yield();
 		(void)_sendRoute(build(_msgTmp, GATEWAY_ADDRESS, NODE_SENSOR_ID,C_INTERNAL, I_LOCKED).set(str));
 		#if defined(MY_SENSOR_NETWORK)
 			transportPowerDown();
-			debug(PSTR("MCO:NLK:TPD\n"));	// power down transport
+			CORE_DEBUG(PSTR("MCO:NLK:TPD\n"));	// power down transport
 		#endif
 		setIndication(INDICATION_SLEEP);
 		(void)hwSleep((unsigned long)1000*60*30); // Sleep for 30 min before resending LOCKED message
 		setIndication(INDICATION_WAKEUP);
 	}
-}
+#else
+	(void)str;
 #endif
+}
+
+void _checkNodeLock(void)
+{
+#ifdef MY_NODE_LOCK_FEATURE
+	// Check if node has been locked down
+	if (hwReadConfig(EEPROM_NODE_LOCK_COUNTER) == 0) {
+		// Node is locked, check if unlock pin is asserted, else hang the node
+		hwPinMode(MY_NODE_UNLOCK_PIN, INPUT_PULLUP);
+		// Make a short delay so we are sure any large external nets are fully pulled
+		unsigned long enter = hwMillis();
+		while (hwMillis() - enter < 2) {}
+		if (hwDigitalRead(MY_NODE_UNLOCK_PIN) == 0) {
+			// Pin is grounded, reset lock counter
+			hwWriteConfig(EEPROM_NODE_LOCK_COUNTER, MY_NODE_LOCK_COUNTER_MAX);
+			// Disable pullup
+			hwPinMode(MY_NODE_UNLOCK_PIN, INPUT);
+			setIndication(INDICATION_ERR_LOCKED);
+			CORE_DEBUG(PSTR("MCO:BGN:NODE UNLOCKED\n"));
+		}
+		else {
+			// Disable pullup
+			hwPinMode(MY_NODE_UNLOCK_PIN, INPUT);
+			_nodeLock("LDB"); //Locked during boot
+		}
+	}
+	else if (hwReadConfig(EEPROM_NODE_LOCK_COUNTER) == 0xFF) {
+		// Reset walue
+		hwWriteConfig(EEPROM_NODE_LOCK_COUNTER, MY_NODE_LOCK_COUNTER_MAX);
+	}
+#endif
+}
diff --git a/core/MySensorsCore.h b/core/MySensorsCore.h
index 56f04a1..9272448 100644
--- a/core/MySensorsCore.h
+++ b/core/MySensorsCore.h
@@ -41,8 +41,9 @@
  * |-|------|-------|-----------------------------------------------|----------------------------------------------------------------------------
  * | | MCO  | BGN	| INIT %%s,CP=%%s,LIB=%%s						| Core initialization, capabilities (CP), library version (VER)
  * | | MCO  | BGN	| BFR											| Callback before()
+ * | | MCO  | BGN	| MTR											| MY_TRANSPORT_RELAX enabled
  * | | MCO  | BGN	| STP											| Callback setup()
- * | | MCO	| BGN	| INIT OK,ID=%%d,PAR=%%d,DIS=%%d,REG=%%d		| Core initialized, parent ID (PAR), distance to GW (DIS), registration (REG)
+ * | | MCO	| BGN	| INIT OK,TSP=%%d								| Core initialised, transport status (TSP), 1=initialised, 0=not initialised
  * | | MCO	| BGN	| NODE UNLOCKED									| Node successfully unlocked (see signing chapter)
  * |!| MCO	| BGN	| TSP FAIL										| Transport initialization failed
  * | | MCO	| REG	| REQ											| Registration request
@@ -85,37 +86,36 @@
 
 
 #ifdef MY_DEBUG
-	#define debug(x,...) hwDebugPrint(x, ##__VA_ARGS__)	//!< debug
+	#define debug(x,...) hwDebugPrint(x, ##__VA_ARGS__)			//!< debug, to be removed (follow-up PR)
+	#define CORE_DEBUG(x,...) hwDebugPrint(x, ##__VA_ARGS__)	//!< debug
 #else
-	#define debug(x,...)								//!< debug NULL
+	#define debug(x,...)										//!< debug NULL, to be removed (follow-up PR)
+	#define CORE_DEBUG(x,...)									//!< debug NULL
 #endif
 
-/**
- * @brief Node configuration
- *
- * This structure stores node-related configurations
- */
-struct NodeConfig {
-	uint8_t nodeId;								//!< Current node id
-	uint8_t parentNodeId;						//!< Where this node sends its messages
-	uint8_t distance;							//!< This nodes distance to sensor net gateway (number of hops)
-};
 
 /**
  * @brief Controller configuration
  *
- * This structure stores controllerrelated configurations
+ * This structure stores controller-related configurations
  */
-struct ControllerConfig {
+typedef struct {
 	uint8_t isMetric;							//!< Flag indicating if metric or imperial measurements are used
-};
+} controllerConfig_t;
+
+/**
+* @brief Node core configuration
+*
+*/
+typedef struct {
+	controllerConfig_t controllerConfig;	//!< Controller config
+	// 8 bit
+	bool registered : 1;					//!< Flag node registered
+	bool presentationSent : 1;				//!< Flag presentation sent
+	bool registrationRequested : 1;			//!< Flag registration requested
+	uint8_t reserved : 5;					//!< reserved
+} coreConfig_t;
 
-extern NodeConfig _nc;							//!< Node config
-extern MyMessage _msg;							//!< Buffer for incoming messages
-extern MyMessage _msgTmp;						//!< Buffer for temporary messages (acks and nonces among others)
-#ifdef MY_DEBUG
-	extern char _convBuf[MAX_PAYLOAD * 2 + 1];
-#endif
 
 // **** public functions ********
 
@@ -203,7 +203,7 @@ bool requestTime(const bool ack = false);
 /**
  * Returns the most recent node configuration received from controller
  */
-ControllerConfig getConfig(void);
+controllerConfig_t getControllerConfig(void);
 
 /**
  * Save a state (in local EEPROM). Good for actuators to "remember" state between
@@ -328,20 +328,23 @@ int8_t smartSleep(const uint8_t interrupt1, const uint8_t mode1, const uint8_t i
 int8_t _sleep(const uint32_t sleepingMS, const bool smartSleep = false, const uint8_t interrupt1 = INTERRUPT_NOT_DEFINED, const uint8_t mode1 = MODE_NOT_DEFINED, const uint8_t interrupt2 = INTERRUPT_NOT_DEFINED, const uint8_t mode2 = MODE_NOT_DEFINED);
 
 
-#ifdef MY_NODE_LOCK_FEATURE
 /**
  * @ingroup MyLockgrp
  * @ingroup internals
  * @brief Lock a node and transmit provided message with 30m intervals
  *
  * This function is called if suspicious activity has exceeded the threshold (see
- * @ref ATTACK_COUNTER_MAX). Unlocking with a normal Arduino bootloader require erasing the EEPROM
- * while unlocking with a custom bootloader require holding @ref UNLOCK_PIN low during power on/reset.
+ * @ref MY_NODE_LOCK_COUNTER_MAX). Unlocking with a normal Arduino bootloader require erasing the EEPROM
+ * while unlocking with a custom bootloader require holding @ref MY_NODE_UNLOCK_PIN low during power on/reset.
  *
  * @param str The string to transmit.
  */
-void nodeLock(const char* str);
-#endif
+void _nodeLock(const char* str);
+
+/**
+ * @brief Check node lock status and prevent node execution if locked.
+ */
+void _checkNodeLock(void);
 
 // **** private functions ********
 
@@ -406,7 +409,7 @@ void loop(void) __attribute__((weak));
 
 // Inline function and macros
 static inline MyMessage& build(MyMessage &msg, const uint8_t destination, const uint8_t sensor, const uint8_t command, const uint8_t type, const bool ack = false) {
-	msg.sender = _nc.nodeId;
+	msg.sender = getNodeId();
 	msg.destination = destination;
 	msg.sensor = sensor;
 	msg.type = type;
diff --git a/core/MySigning.cpp b/core/MySigning.cpp
index a9be61f..bdfa4e9 100644
--- a/core/MySigning.cpp
+++ b/core/MySigning.cpp
@@ -185,7 +185,7 @@ bool signerProcessInternal(MyMessage &msg) {
 		nof_nonce_requests++;
 		SIGN_DEBUG(PSTR("Nonce requests left until lockdown: %d\n"), MY_NODE_LOCK_COUNTER_MAX-nof_nonce_requests);
 		if (nof_nonce_requests >= MY_NODE_LOCK_COUNTER_MAX) {
-			nodeLock("TMNR"); //Too many nonces requested
+			_nodeLock("TMNR"); //Too many nonces requested
 		}
 #endif
 #if defined(MY_SIGNING_SOFT)
@@ -317,7 +317,7 @@ bool signerSignMsg(MyMessage &msg) {
 #if defined(MY_SIGNING_FEATURE)
 	// If destination is known to require signed messages and we are the sender,
 	// sign this message unless it is a handshake message
-	if (DO_SIGN(msg.destination) && msg.sender == _nc.nodeId) {
+	if (DO_SIGN(msg.destination) && msg.sender == getNodeId()) {
 		if (skipSign(msg)) {
 			return true;
 		} else {
@@ -350,7 +350,7 @@ bool signerSignMsg(MyMessage &msg) {
 			// After this point, only the 'last' member of the message structure is allowed to be altered if the
 			// message has been signed, or signature will become invalid and the message rejected by the receiver
 		}
-	} else if (_nc.nodeId == msg.sender) {
+	} else if (getNodeId() == msg.sender) {
 		mSetSigned(msg, 0); // Message is not supposed to be signed, make sure it is marked unsigned
 	}
 #else
@@ -368,9 +368,9 @@ bool signerVerifyMsg(MyMessage &msg) {
 	// If we are a node, or we are a gateway and the sender require signatures (or just a strict gw)
 	// and we are the destination...
 #if defined(MY_SIGNING_GW_REQUEST_SIGNATURES_FROM_ALL)
-	if (msg.destination == _nc.nodeId) {
+	if (msg.destination == getNodeId()) {
 #else
-	if ((!MY_IS_GATEWAY || DO_SIGN(msg.sender)) && msg.destination == _nc.nodeId) {
+	if ((!MY_IS_GATEWAY || DO_SIGN(msg.sender)) && msg.destination == getNodeId()) {
 #endif
 		// Internal messages of certain types are not verified
 		if (skipSign(msg)) {
@@ -399,7 +399,7 @@ bool signerVerifyMsg(MyMessage &msg) {
 				nof_failed_verifications++;
 				SIGN_DEBUG(PSTR("Failed verification attempts left until lockdown: %d\n"), MY_NODE_LOCK_COUNTER_MAX-nof_failed_verifications);
 				if (nof_failed_verifications >= MY_NODE_LOCK_COUNTER_MAX) {
-					nodeLock("TMFV"); //Too many failed verifications
+					_nodeLock("TMFV"); //Too many failed verifications
 				}
 			}
 #endif
diff --git a/core/MyTransport.cpp b/core/MyTransport.cpp
index 129715d..e921cad 100644
--- a/core/MyTransport.cpp
+++ b/core/MyTransport.cpp
@@ -20,20 +20,25 @@
 #include "MyTransport.h"
 
 // SM: transitions and update states
-static transportState stInit = { stInitTransition, stInitUpdate };
-static transportState stParent = { stParentTransition, stParentUpdate };
-static transportState stID = { stIDTransition, stIDUpdate };
-static transportState stUplink = { stUplinkTransition, stUplinkUpdate };
-static transportState stReady = { stReadyTransition, stReadyUpdate };
-static transportState stFailure = { stFailureTransition, stFailureUpdate };
+static transportState_t stInit = { stInitTransition, stInitUpdate };
+static transportState_t stParent = { stParentTransition, stParentUpdate };
+static transportState_t stID = { stIDTransition, stIDUpdate };
+static transportState_t stUplink = { stUplinkTransition, stUplinkUpdate };
+static transportState_t stReady = { stReadyTransition, stReadyUpdate };
+static transportState_t stFailure = { stFailureTransition, stFailureUpdate };
 
 // transport SM variables
-static transportSM _transportSM;
+static transportSM_t _transportSM;
+
+// transport config
+transportConfig_t transportConfig;		
+
+// callbacks
+transportCallback_t transportOk_cb = NULL;
 
 // global variables
 extern MyMessage _msg;		// incoming message
 extern MyMessage _msgTmp;	// outgoing message
-extern NodeConfig _nc;		// node config
 
 #if defined(MY_RAM_ROUTING_TABLE_ENABLED)
 	static routingTable _transportRoutingTable;		//!< routing table
@@ -70,13 +75,10 @@ void stInitTransition(void) {
 	#endif
 
 	// Read node settings (ID, parent ID, GW distance) from EEPROM
-	hwReadConfigBlock((void*)&_nc, (void*)EEPROM_NODE_ID_ADDRESS, sizeof(NodeConfig));
+	hwReadConfigBlock((void*)&transportConfig, (void*)EEPROM_NODE_ID_ADDRESS, sizeof(transportConfig_t));
 }
 
 void stInitUpdate(void) {
-	#if defined(MY_TRANSPORT_DONT_CARE_MODE)
-		TRANSPORT_DEBUG(PSTR("TSM:INIT:TDC\n"));	// transport don't care mode
-	#endif
 	// initialise radio
 	if (!transportInit()) {
 		TRANSPORT_DEBUG(PSTR("!TSM:INIT:TSP FAIL\n"));
@@ -89,9 +91,9 @@ void stInitUpdate(void) {
 		#if defined(MY_GATEWAY_FEATURE)
 			// Set configuration for gateway
 			TRANSPORT_DEBUG(PSTR("TSM:INIT:GW MODE\n"));
-			_nc.parentNodeId = GATEWAY_ADDRESS;
-			_nc.distance = 0u;
-			_nc.nodeId = GATEWAY_ADDRESS;
+			transportConfig.parentNodeId = GATEWAY_ADDRESS;
+			transportConfig.distanceGW = 0u;
+			transportConfig.nodeId = GATEWAY_ADDRESS;
 			transportSetAddress(GATEWAY_ADDRESS);
 			// GW mode: skip FPAR,ID,UPL states
 			transportSwitchSM(stReady);
@@ -99,12 +101,12 @@ void stInitUpdate(void) {
 			if ((uint8_t)MY_NODE_ID != AUTO) {
 				TRANSPORT_DEBUG(PSTR("TSM:INIT:STATID=%d\n"),(uint8_t)MY_NODE_ID);
 				// Set static ID
-				_nc.nodeId = (uint8_t)MY_NODE_ID;
+				transportConfig.nodeId = (uint8_t)MY_NODE_ID;
 				// Save static ID to eeprom (for bootloader)
 				hwWriteConfig(EEPROM_NODE_ID_ADDRESS, (uint8_t)MY_NODE_ID);
 			}
 			// assign ID if set
-			if (_nc.nodeId == AUTO || transportAssignNodeID(_nc.nodeId)) {
+			if (transportConfig.nodeId == AUTO || transportAssignNodeID(transportConfig.nodeId)) {
 				// if node ID valid (>0 and <255), proceed to next state
 				transportSwitchSM(stParent);
 			}
@@ -125,14 +127,14 @@ void stParentTransition(void)  {
 	#if defined(MY_PARENT_NODE_IS_STATIC)
 		TRANSPORT_DEBUG(PSTR("TSM:FPAR:STATP=%d\n"), (uint8_t)MY_PARENT_NODE_ID);	// static parent
 		_transportSM.findingParentNode = false;
-		_nc.distance = 1u;	// assumption, CHKUPL:GWDC will update this variable
-		_nc.parentNodeId = (uint8_t)MY_PARENT_NODE_ID;
+		transportConfig.distanceGW = 1u;	// assumption, CHKUPL:GWDC will update this variable
+		transportConfig.parentNodeId = (uint8_t)MY_PARENT_NODE_ID;
 		// save parent ID to eeprom (for bootloader)
 		hwWriteConfig(EEPROM_PARENT_NODE_ID_ADDRESS, (uint8_t)MY_PARENT_NODE_ID);
 	#else
 		_transportSM.findingParentNode = true;
-		_nc.distance = DISTANCE_INVALID;	// Set distance to max and invalidate parent node ID
-		_nc.parentNodeId = AUTO;
+		transportConfig.distanceGW = DISTANCE_INVALID;	// Set distance to max and invalidate parent node ID
+		transportConfig.parentNodeId = AUTO;
 		// Broadcast find parent request
 		(void)transportRouteMessage(build(_msgTmp, BROADCAST_ADDRESS, NODE_SENSOR_ID, C_INTERNAL, I_FIND_PARENT_REQUEST).set(""));
 	#endif
@@ -147,7 +149,7 @@ void stParentUpdate(void) {
 	#else
 		if (transportTimeInState() > MY_TRANSPORT_STATE_TIMEOUT_MS || _transportSM.preferredParentFound) {
 			// timeout or preferred parent found
-			if (_nc.parentNodeId != AUTO) {
+			if (transportConfig.parentNodeId != AUTO) {
 				// parent assigned
 				TRANSPORT_DEBUG(PSTR("TSM:FPAR:OK\n"));	// find parent ok
 				_transportSM.findingParentNode = false;
@@ -177,7 +179,7 @@ void stParentUpdate(void) {
 // stID: verify and request ID if necessary
 void stIDTransition(void) {
 	TRANSPORT_DEBUG(PSTR("TSM:ID\n"));	// verify/request node ID
-	if (_nc.nodeId == AUTO) {
+	if (transportConfig.nodeId == AUTO) {
 		// send ID request
 		setIndication(INDICATION_REQ_NODEID);
 		TRANSPORT_DEBUG(PSTR("TSM:ID:REQ\n"));	// request node ID
@@ -186,7 +188,7 @@ void stIDTransition(void) {
 }
 
 void stIDUpdate(void) {
-	if (_nc.nodeId != AUTO) {
+	if (transportConfig.nodeId != AUTO) {
 		// current node ID is valid
 		TRANSPORT_DEBUG(PSTR("TSM:ID:OK\n"));
 		setIndication(INDICATION_GOT_NODEID);
@@ -225,9 +227,9 @@ void stUplinkUpdate(void) {
 			// uplink ok, i.e. GW replied
 			TRANSPORT_DEBUG(PSTR("TSM:UPL:OK\n"));	// uplink ok
 			//_transportSM.pingActive = false; ==> set false upon receiving I_PONG
-			if (_transportSM.pingResponse != _nc.distance) {
-				TRANSPORT_DEBUG(PSTR("TSM:UPL:DGWC,O=%d,N=%d\n"), _nc.distance, _transportSM.pingResponse);	// distance to GW changed
-				_nc.distance = _transportSM.pingResponse;
+			if (_transportSM.pingResponse != transportConfig.distanceGW) {
+				TRANSPORT_DEBUG(PSTR("TSM:UPL:DGWC,O=%d,N=%d\n"), transportConfig.distanceGW, _transportSM.pingResponse);	// distance to GW changed
+				transportConfig.distanceGW = _transportSM.pingResponse;
 			}
 			transportSwitchSM(stReady);		// proceed to next state
 		}
@@ -257,6 +259,11 @@ void stReadyTransition(void) {
 	_transportSM.uplinkOk = true;
 	_transportSM.failureCounter = 0u;			// reset failure counter
 	_transportSM.failedUplinkTransmissions = 0u;	// reset failed uplink TX counter
+	// callback
+	if (transportOk_cb) {
+		transportOk_cb();
+	}
+	TRANSPORT_DEBUG(PSTR("TSM:READY:PARAM,ID=%d,PAR=%d,DIS=%d\n"), transportConfig.nodeId, transportConfig.parentNodeId, transportConfig.distanceGW);
 }
 
 // stReadyUpdate: monitors link
@@ -311,7 +318,7 @@ void stFailureUpdate(void) {
 	}
 }
 
-void transportSwitchSM(transportState& newState) {
+void transportSwitchSM(transportState_t& newState) {
 	if (_transportSM.currentState != &newState) {
 		_transportSM.stateRetries = 0u;	// state change, reset retry counter
 		_transportSM.currentState = &newState;	// change state
@@ -386,9 +393,9 @@ bool transportCheckUplink(const bool force) {
 		_transportSM.lastUplinkCheck = hwMillis();
 		TRANSPORT_DEBUG(PSTR("TSF:CKU:OK\n"));
 		// did distance to GW change upstream, eg. re-routing of uplink nodes
-		if (hopsCount != _nc.distance) {
-			TRANSPORT_DEBUG(PSTR("TSF:CKU:DGWC,O=%d,N=%d\n"), _nc.distance, hopsCount);	// distance to GW changed
-			_nc.distance = hopsCount;
+		if (hopsCount != transportConfig.distanceGW) {
+			TRANSPORT_DEBUG(PSTR("TSF:CKU:DGWC,O=%d,N=%d\n"), transportConfig.distanceGW, hopsCount);	// distance to GW changed
+			transportConfig.distanceGW = hopsCount;
 		}
 		return true;
 	}
@@ -401,7 +408,7 @@ bool transportCheckUplink(const bool force) {
 bool transportAssignNodeID(const uint8_t newNodeId) {
 	// verify if ID valid
 	if (newNodeId != GATEWAY_ADDRESS && newNodeId != AUTO) {
-		_nc.nodeId = newNodeId;
+		transportConfig.nodeId = newNodeId;
 		transportSetAddress(newNodeId);
 		// Write ID to EEPROM
 		hwWriteConfig(EEPROM_NODE_ID_ADDRESS, newNodeId);
@@ -411,14 +418,14 @@ bool transportAssignNodeID(const uint8_t newNodeId) {
 	else {
 		TRANSPORT_DEBUG(PSTR("!TSF:SID:FAIL,ID=%d\n"),newNodeId);	// ID is invalid, cannot assign ID
 		setIndication(INDICATION_ERR_NET_FULL);
-		_nc.nodeId = AUTO;
+		transportConfig.nodeId = AUTO;
 		return false;
 	}
 }
 
 bool transportRouteMessage(MyMessage &message) {
 	const uint8_t destination = message.destination;
-	uint8_t route = _nc.parentNodeId;	// by default, all traffic is routed via parent node
+	uint8_t route = transportConfig.parentNodeId;	// by default, all traffic is routed via parent node
 
 	if (_transportSM.findingParentNode && destination != BROADCAST_ADDRESS) {
 		TRANSPORT_DEBUG(PSTR("!TSF:RTE:FPAR ACTIVE\n")); // find parent active, message not sent
@@ -427,7 +434,7 @@ bool transportRouteMessage(MyMessage &message) {
 	}
 
 	if (destination == GATEWAY_ADDRESS) {
-		route = _nc.parentNodeId;		// message to GW always routes via parent
+		route = transportConfig.parentNodeId;		// message to GW always routes via parent
 	}
 	else if (destination == BROADCAST_ADDRESS) {
 		route = BROADCAST_ADDRESS;		// message to BC does not require routing
@@ -439,9 +446,9 @@ bool transportRouteMessage(MyMessage &message) {
 			if (route == AUTO) {
 				TRANSPORT_DEBUG(PSTR("!TSF:RTE:%d UNKNOWN\n"), destination);	// route unknown
 				#if !defined(MY_GATEWAY_FEATURE)
-					if (message.last != _nc.parentNodeId) {
+					if (message.last != transportConfig.parentNodeId) {
 						// message not from parent, i.e. child node - route it to parent
-						route = _nc.parentNodeId;
+						route = transportConfig.parentNodeId;
 					}
 					else {
 						// route unknown and msg received from parent, send it to destination assuming in rx radius
@@ -453,14 +460,14 @@ bool transportRouteMessage(MyMessage &message) {
 				#endif
 			}
 		#else
-			route = _nc.parentNodeId;	// not a repeater, all traffic routed via parent
+			route = transportConfig.parentNodeId;	// not a repeater, all traffic routed via parent
 		#endif
 	}
 	// send message
 	const bool result = transportSendWrite(route, message);
 	#if !defined(MY_GATEWAY_FEATURE)
 		// update counter
-		if (route == _nc.parentNodeId) {
+		if (route == transportConfig.parentNodeId) {
 			if (!result) {
 				setIndication(INDICATION_ERR_TX);
 				_transportSM.failedUplinkTransmissions++;
@@ -506,7 +513,7 @@ bool transportWait(const uint32_t ms, const uint8_t cmd, const uint8_t msgtype){
 uint8_t transportPingNode(const uint8_t targetId) {
 	if(!_transportSM.pingActive){
 		TRANSPORT_DEBUG(PSTR("TSF:PNG:SEND,TO=%d\n"), targetId);
-		if(targetId == _nc.nodeId) {
+		if(targetId == transportConfig.nodeId) {
 			// pinging self
 			_transportSM.pingResponse = 0u;
 		}
@@ -574,7 +581,7 @@ void transportProcessMessage(void) {
 	// update routing table if msg not from parent
 	#if defined(MY_REPEATER_FEATURE)
 		#if !defined(MY_GATEWAY_FEATURE)
-			if (last != _nc.parentNodeId) {
+			if (last != transportConfig.parentNodeId) {
 		#else
 			// GW doesn't have parent
 			{
@@ -588,7 +595,7 @@ void transportProcessMessage(void) {
 	_transportSM.msgReceived = true;
 
 	// Is message addressed to this node?
-	if (destination == _nc.nodeId) {
+	if (destination == transportConfig.nodeId) {
 		// prevent buffer overflow by limiting max. possible message length (5 bits=31 bytes max) to MAX_PAYLOAD (25 bytes)
 		mSetLength(_msg, min(mGetLength(_msg),(uint8_t)MAX_PAYLOAD));
 		// null terminate data
@@ -599,7 +606,7 @@ void transportProcessMessage(void) {
 			_msgTmp = _msg;	// Copy message
 			mSetRequestAck(_msgTmp, false); // Reply without ack flag (otherwise we would end up in an eternal loop)
 			mSetAck(_msgTmp, true); // set ACK flag
-			_msgTmp.sender = _nc.nodeId;
+			_msgTmp.sender = transportConfig.nodeId;
 			_msgTmp.destination = sender;
 			// send ACK, use transportSendRoute since ACK reply is not internal, i.e. if !transportOK do not reply
 			(void)transportSendRoute(_msgTmp);
@@ -627,15 +634,15 @@ void transportProcessMessage(void) {
 								if (isValidDistance(distance)) {
 									distance++;	// Distance to gateway is one more for us w.r.t. parent
 									// update settings if distance shorter or preferred parent found
-									if (((isValidDistance(distance) && distance < _nc.distance) || (!_autoFindParent && sender == (uint8_t)MY_PARENT_NODE_ID)) && !_transportSM.preferredParentFound) {
+									if (((isValidDistance(distance) && distance < transportConfig.distanceGW) || (!_autoFindParent && sender == (uint8_t)MY_PARENT_NODE_ID)) && !_transportSM.preferredParentFound) {
 										// Found a neighbor closer to GW than previously found
 										if (!_autoFindParent && sender == (uint8_t)MY_PARENT_NODE_ID) {
 											_transportSM.preferredParentFound = true;
 											TRANSPORT_DEBUG(PSTR("TSF:MSG:FPAR PREF\n"));	// find parent, preferred parent found
 										}
-										_nc.distance = distance;
-										_nc.parentNodeId = sender;
-										TRANSPORT_DEBUG(PSTR("TSF:MSG:FPAR OK,ID=%d,D=%d\n"), _nc.parentNodeId, _nc.distance);
+										transportConfig.distanceGW = distance;
+										transportConfig.parentNodeId = sender;
+										TRANSPORT_DEBUG(PSTR("TSF:MSG:FPAR OK,ID=%d,D=%d\n"), transportConfig.parentNodeId, transportConfig.distanceGW);
 									}
 								}
 							}
@@ -697,7 +704,7 @@ void transportProcessMessage(void) {
 				// only reply if node is fully operational
 				if (type == I_FIND_PARENT_REQUEST) {
 					#if defined(MY_REPEATER_FEATURE)
-					if (sender != _nc.parentNodeId) {	// no circular reference
+					if (sender != transportConfig.parentNodeId) {	// no circular reference
 						TRANSPORT_DEBUG(PSTR("TSF:MSG:FPAR REQ,ID=%d\n"), sender);	// FPAR: find parent request
 						// check if uplink functional - node can only be parent node if link to GW functional
 						// this also prevents circular references in case GW ooo
@@ -706,7 +713,7 @@ void transportProcessMessage(void) {
 							TRANSPORT_DEBUG(PSTR("TSF:MSG:GWL OK\n")); // GW uplink ok
 							// random delay minimizes collisions
 							delay(hwMillis() & 0x3ff);
-							(void)transportRouteMessage(build(_msgTmp, sender, NODE_SENSOR_ID, C_INTERNAL, I_FIND_PARENT_RESPONSE).set(_nc.distance));
+							(void)transportRouteMessage(build(_msgTmp, sender, NODE_SENSOR_ID, C_INTERNAL, I_FIND_PARENT_RESPONSE).set(transportConfig.distanceGW));
 						}
 						else {
 							TRANSPORT_DEBUG(PSTR("!TSF:MSG:GWL FAIL\n")); // GW uplink fail, do not respond to parent request
@@ -721,10 +728,10 @@ void transportProcessMessage(void) {
 			}
 			#if !defined(MY_GATEWAY_FEATURE)
 				if (type == I_DISCOVER_REQUEST) {
-					if (last == _nc.parentNodeId) {
+					if (last == transportConfig.parentNodeId) {
 						// random wait to minimize collisions
 						delay(hwMillis() & 0x3ff);
-						(void)transportRouteMessage(build(_msgTmp, sender, NODE_SENSOR_ID, C_INTERNAL, I_DISCOVER_RESPONSE).set(_nc.parentNodeId));
+						(void)transportRouteMessage(build(_msgTmp, sender, NODE_SENSOR_ID, C_INTERNAL, I_DISCOVER_RESPONSE).set(transportConfig.parentNodeId));
 						// no return here (for fwd if repeater)
 					}
 				}
@@ -733,7 +740,7 @@ void transportProcessMessage(void) {
 		// controlled BC relay
 		#if defined(MY_REPEATER_FEATURE)
 			// controlled BC repeating: forward only if message received from parent and sender not self to prevent circular fwds
-			if(last == _nc.parentNodeId && sender != _nc.nodeId && isTransportReady()){
+			if(last == transportConfig.parentNodeId && sender != transportConfig.nodeId && isTransportReady()){
 				TRANSPORT_DEBUG(PSTR("TSF:MSG:FWD BC MSG\n")); // controlled broadcast msg forwarding
 				(void)transportRouteMessage(_msg);
 			}
@@ -743,7 +750,7 @@ void transportProcessMessage(void) {
 		if (command != C_INTERNAL) {
 			#if !defined(MY_GATEWAY_FEATURE)
 				// only proceed if message received from parent
-				if (last != _nc.parentNodeId) {
+				if (last != transportConfig.parentNodeId) {
 					return;
 				}
 			#endif
@@ -818,7 +825,7 @@ void transportProcessFIFO(void) {
 }
 
 bool transportSendWrite(const uint8_t to, MyMessage &message) {
-	message.last = _nc.nodeId; // Update last
+	message.last = transportConfig.nodeId; // Update last
 	// sign message if required
 	if (!signerSignMsg(message)) {
 		TRANSPORT_DEBUG(PSTR("!TSF:MSG:SIGN FAIL\n"));
@@ -842,6 +849,25 @@ bool transportSendWrite(const uint8_t to, MyMessage &message) {
 	return result;
 }
 
+void transportRegisterTransportOkCallback(transportCallback_t cb)
+{
+	transportOk_cb = cb;
+}
+
+uint8_t transportGetNodeId(void)
+{
+	return transportConfig.nodeId;
+}
+uint8_t transportGetParentNodeId(void)
+{
+	return transportConfig.parentNodeId;
+}
+uint8_t transportGetDistanceGW(void)
+{
+	return transportConfig.distanceGW;
+}
+
+
 void transportClearRoutingTable(void) {
 	for (uint16_t i = 0; i < SIZE_ROUTES; i++) {
 		transportSetRoute((uint8_t)i, BROADCAST_ADDRESS);
diff --git a/core/MyTransport.h b/core/MyTransport.h
index 305b53f..edbf35d 100644
--- a/core/MyTransport.h
+++ b/core/MyTransport.h
@@ -55,7 +55,6 @@
  * |E| SYS	| SUB		| Message				| Comment
  * |-|------|-----------|-----------------------|---------------------------------------------------------------------
  * | | TSM	| INIT		|						| <b>Transition to stInit state</b>
- * | | TSM	| INIT		| TDC					| Transport don't care mode
  * | | TSM	| INIT		| STATID=%%d			| Node ID is static
  * | | TSM	| INIT		| TSP OK				| Transport device configured and fully operational
  * | | TSM	| INIT		| GW MODE				| Node is set up as GW, thus omitting ID and findParent states
@@ -147,11 +146,13 @@
 
  // debug 
 #if defined(MY_DEBUG)
-	#define TRANSPORT_DEBUG(x,...) debug(x, ##__VA_ARGS__)	//!< debug
+	#define TRANSPORT_DEBUG(x,...) hwDebugPrint(x, ##__VA_ARGS__)	//!< debug
+	extern char _convBuf[MAX_PAYLOAD * 2 + 1];
 #else
 	#define TRANSPORT_DEBUG(x,...)							//!< debug NULL
 #endif
 
+
 #if defined(MY_REPEATER_FEATURE)
 	#define MY_TRANSPORT_MAX_TX_FAILURES	(10u)		//!< search for a new parent node after this many transmission failures, higher threshold for repeating nodes
 #else
@@ -204,16 +205,32 @@
 	#error Receive message buffering requires message buffering feature enabled!
 #endif
 
+/**
+* @brief Callback
+*
+*/
+typedef void(*transportCallback_t)(void);
+
+/**
+* @brief Node configuration
+*
+* This structure stores node-related configurations
+*/
+typedef struct {
+	uint8_t nodeId;								//!< Current node id
+	uint8_t parentNodeId;						//!< Where this node sends its messages
+	uint8_t distanceGW;							//!< This nodes distance to sensor net gateway (number of hops)
+} transportConfig_t;
 
  /**
  * @brief SM state
  *
  * This structure stores SM state definitions
  */
-struct transportState {
+typedef struct {
 	void(*Transition)();					//!< state transition function
 	void(*Update)();						//!< state update function
-};
+} transportState_t;
 
 /**
 * @brief Status variables and SM state
@@ -222,7 +239,7 @@ struct transportState {
 */ 
 typedef struct {
 	// SM variables
-	transportState* currentState;			//!< pointer to current fsm state
+	transportState_t* currentState;			//!< pointer to current fsm state
 	uint32_t stateEnter;					//!< state enter timepoint
 	// general transport variables
 	uint32_t lastUplinkCheck;				//!< last uplink check, required to prevent GW flooding
@@ -239,7 +256,7 @@ typedef struct {
 	bool msgReceived : 1;					//!< flag message received
 	// 8 bits
 	uint8_t pingResponse;					//!< stores I_PONG hops
-} transportSM;
+} transportSM_t;
 
 /**
 * @brief RAM routing table
@@ -302,7 +319,7 @@ void stFailureUpdate(void);
 * @brief Switch SM state
 * @param newState New state to switch SM to
 */
-void transportSwitchSM(transportState& newState);
+void transportSwitchSM(transportState_t& newState);
 /**
 * @brief Update SM state
 */
@@ -483,6 +500,22 @@ uint8_t transportReceive(void* data);
 */
 void transportPowerDown();
 
+/**
+* @brief Get node ID
+* @return node ID
+*/
+uint8_t transportGetNodeId(void);
+/**
+* @brief Get parent node ID
+* @return parent node ID
+*/
+uint8_t transportGetParentNodeId(void);
+/**
+* @brief Get distance to GW
+* @return distance (=hops) to GW
+*/
+uint8_t transportGetDistanceGW(void);
+
 
 #endif // MyTransport_h
 /** @}*/