diff --git a/core/MyTransport.h b/core/MyTransport.h
index 3355db081..02a3f0eca 100644
--- a/core/MyTransport.h
+++ b/core/MyTransport.h
@@ -269,11 +269,11 @@ typedef struct {
 // PRIVATE functions
 
 /**
-* @brief Initialise SM variables and transport HW
+* @brief Initialize SM variables and transport HW
 */
 void stInitTransition(void);
 /**
-* @brief Initialise transport
+* @brief Initialize transport
 */
 void stInitUpdate(void);
 /**
@@ -345,7 +345,7 @@ void transportProcessMessage(void);
 /**
 * @brief Assign node ID
 * @param newNodeId New node ID
-* @return true if node ID valid and successfully assigned
+* @return true if node ID is valid and successfully assigned
 */
 bool transportAssignNodeID(const uint8_t newNodeId);
 /**
@@ -409,7 +409,7 @@ void transportInitialize(void);
 void transportProcess(void);
 /**
 * @brief Flag transport ready
-* @return true if transport is initialize and ready
+* @return true if transport is initialized and ready
 */
 bool isTransportReady(void);
 /**
@@ -462,7 +462,21 @@ void transportSetRoute(const uint8_t node, const uint8_t route);
 * @return route to node
 */
 uint8_t transportGetRoute(const uint8_t node);
-
+/**
+* @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);
 
 // interface functions for radio driver
 
@@ -470,15 +484,15 @@ uint8_t transportGetRoute(const uint8_t node);
 * @brief Initialize transport HW
 * @return true if initialization successful
 */
-bool transportInit();
+bool transportInit(void);
 /**
 * @brief Set node address
 */
-void transportSetAddress(uint8_t address);
+void transportSetAddress(const uint8_t address);
 /**
 * @brief Retrieve node address
 */
-uint8_t transportGetAddress();
+uint8_t transportGetAddress(void);
 /**
 * @brief Send message
 * @param to recipient
@@ -486,17 +500,17 @@ uint8_t transportGetAddress();
 * @param len length of message (header + payload)
 * @return true if message sent successfully
 */
-bool transportSend(uint8_t to, const void* data, uint8_t len);
+bool transportSend(const uint8_t to, const void* data, const uint8_t len);
 /**
 * @brief Verify if RX FIFO has pending messages
 * @return true if message available in RX FIFO
 */
-bool transportAvailable();
+bool transportAvailable(void);
 /**
 * @brief Sanity check for transport: is transport still responsive?
-* @return true transport ok
+* @return true if transport HW is ok
 */
-bool transportSanityCheck();
+bool transportSanityCheck(void);
 /**
 * @brief Receive message from FIFO
 * @return length of recevied message (header + payload)
@@ -505,24 +519,7 @@ uint8_t transportReceive(void* data);
 /**
 * @brief Power down transport HW
 */
-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);
-
+void transportPowerDown(void);
 
 #endif // MyTransport_h
 /** @}*/
diff --git a/core/MyTransportNRF24.cpp b/core/MyTransportNRF24.cpp
index 65230da36..14e8d257b 100644
--- a/core/MyTransportNRF24.cpp
+++ b/core/MyTransportNRF24.cpp
@@ -94,19 +94,19 @@ uint8_t transportGetAddress(void)
 	return RF24_getNodeID();
 }
 
-bool transportSend(const uint8_t recipient, const void* data, uint8_t len)
+bool transportSend(const uint8_t to, const void* data, const uint8_t len)
 {
 #if defined(MY_RF24_ENABLE_ENCRYPTION)
 	// copy input data because it is read-only
 	(void)memcpy(_dataenc,data,len);
 	// has to be adjusted, WIP!
 	_aes.set_IV(0);
-	len = len > 16 ? 32 : 16;
+	const uint8_t finalLength = len > 16 ? 32 : 16;
 	//encrypt data
-	_aes.cbc_encrypt(_dataenc, _dataenc, len/16);
-	return RF24_sendMessage(recipient, _dataenc, len);
+	_aes.cbc_encrypt(_dataenc, _dataenc, finalLength /16);
+	return RF24_sendMessage(to, _dataenc, finalLength);
 #else
-	return RF24_sendMessage(recipient, data, len);
+	return RF24_sendMessage(to, data, len);
 #endif
 }
 
diff --git a/core/MyTransportRFM69.cpp b/core/MyTransportRFM69.cpp
index b5ff53fab..905ee8b1a 100644
--- a/core/MyTransportRFM69.cpp
+++ b/core/MyTransportRFM69.cpp
@@ -26,7 +26,7 @@ RFM69 _radio(MY_RF69_SPI_CS, MY_RF69_IRQ_PIN, MY_RFM69HW, MY_RF69_IRQ_NUM);
 uint8_t _address;
 
 
-bool transportInit()
+bool transportInit(void)
 {
 	// Start up the radio library (_address will be set later by the MySensors library)
 	if (_radio.initialize(MY_RFM69_FREQUENCY, _address, MY_RFM69_NETWORKID)) {
@@ -41,28 +41,28 @@ bool transportInit()
 	return false;
 }
 
-void transportSetAddress(uint8_t address)
+void transportSetAddress(const uint8_t address)
 {
 	_address = address;
 	_radio.setAddress(address);
 }
 
-uint8_t transportGetAddress()
+uint8_t transportGetAddress(void)
 {
 	return _address;
 }
 
-bool transportSend(uint8_t to, const void* data, uint8_t len)
+bool transportSend(const uint8_t to, const void* data, const uint8_t len)
 {
 	return _radio.sendWithRetry(to,data,len);
 }
 
-bool transportAvailable()
+bool transportAvailable(void)
 {
 	return _radio.receiveDone();
 }
 
-bool transportSanityCheck()
+bool transportSanityCheck(void)
 {
 	// not implemented yet
 	return true;
@@ -80,7 +80,7 @@ uint8_t transportReceive(void* data)
 	return dataLen;
 }
 
-void transportPowerDown()
+void transportPowerDown(void)
 {
 	_radio.sleep();
 }
diff --git a/core/MyTransportRFM95.cpp b/core/MyTransportRFM95.cpp
index 9981bd5ce..3b88994e9 100644
--- a/core/MyTransportRFM95.cpp
+++ b/core/MyTransportRFM95.cpp
@@ -32,7 +32,7 @@ bool transportInit(void)
 	return result;
 }
 
-void transportSetAddress(uint8_t address)
+void transportSetAddress(const uint8_t address)
 {
 	RFM95_setAddress(address);
 }
@@ -42,7 +42,7 @@ uint8_t transportGetAddress(void)
 	return RFM95_getAddress();
 }
 
-bool transportSend(uint8_t to, const void* data, uint8_t len)
+bool transportSend(const uint8_t to, const void* data, const uint8_t len)
 {
 	return RFM95_sendWithRetry(to, data, len);
 }
diff --git a/core/MyTransportRS485.cpp b/core/MyTransportRS485.cpp
index b86560222..976bc867c 100644
--- a/core/MyTransportRS485.cpp
+++ b/core/MyTransportRS485.cpp
@@ -239,7 +239,7 @@ bool _serialProcess()
 	return true;
 }
 
-bool transportSend(uint8_t to, const void* data, uint8_t len)
+bool transportSend(const uint8_t to, const void* data, const uint8_t len)
 {
 	const char *datap = static_cast<char const *>(data);
 	unsigned char i;
@@ -319,7 +319,7 @@ bool transportSend(uint8_t to, const void* data, uint8_t len)
 
 
 
-bool transportInit()
+bool transportInit(void)
 {
 	// Reset the state machine
 	_dev.begin(MY_RS485_BAUD_RATE);
@@ -331,24 +331,24 @@ bool transportInit()
 	return true;
 }
 
-void transportSetAddress(uint8_t address)
+void transportSetAddress(const uint8_t address)
 {
 	_nodeId = address;
 }
 
-uint8_t transportGetAddress()
+uint8_t transportGetAddress(void)
 {
 	return _nodeId;
 }
 
 
-bool transportAvailable()
+bool transportAvailable(void)
 {
 	_serialProcess();
 	return _packet_received;
 }
 
-bool transportSanityCheck()
+bool transportSanityCheck(void)
 {
 	// not implemented yet
 	return true;
@@ -365,7 +365,7 @@ uint8_t transportReceive(void* data)
 	}
 }
 
-void transportPowerDown()
+void transportPowerDown(void)
 {
 	// Nothing to shut down here
 }