diff --git a/libraries/ArduinoOTA/ArduinoOTA.cpp b/libraries/ArduinoOTA/ArduinoOTA.cpp
index 9b55733bb..39ce83663 100644
--- a/libraries/ArduinoOTA/ArduinoOTA.cpp
+++ b/libraries/ArduinoOTA/ArduinoOTA.cpp
@@ -22,15 +22,16 @@ extern "C" {
 
 ArduinoOTAClass::ArduinoOTAClass()
 : _port(0)
+, _udp_ota(0)
+, _initialized(false)
 , _state(OTA_IDLE)
 , _size(0)
 , _cmd(0)
 , _ota_port(0)
 , _start_callback(NULL)
 , _end_callback(NULL)
-, _progress_callback(NULL)
 , _error_callback(NULL)
-, _udp_ota(0)
+, _progress_callback(NULL)
 {
 }
 
diff --git a/libraries/ESP8266SSDP/ESP8266SSDP.cpp b/libraries/ESP8266SSDP/ESP8266SSDP.cpp
index 24997eee8..ee1a78530 100644
--- a/libraries/ESP8266SSDP/ESP8266SSDP.cpp
+++ b/libraries/ESP8266SSDP/ESP8266SSDP.cpp
@@ -126,9 +126,13 @@ struct SSDPTimer {
 
 SSDPClass::SSDPClass() :
 _server(0),
+_timer(new SSDPTimer),
 _port(80),
+_respondToPort(0),
 _pending(false),
-_timer(new SSDPTimer)
+_delay(0),
+_process_time(0),
+_notify_time(0)
 {
   _uuid[0] = '\0';
   _modelNumber[0] = '\0';
@@ -300,6 +304,8 @@ void SSDPClass::_update(){
         case VALUE:
           if(cr == 2){
             switch(header){
+            case START:
+            	break;
               case MAN:
 #ifdef DEBUG_SSDP
                 DEBUG_SSDP.printf("MAN: %s\n", (char *)buffer);
diff --git a/libraries/ESP8266SSDP/ESP8266SSDP.h b/libraries/ESP8266SSDP/ESP8266SSDP.h
index 8f6e280f3..d931a8df4 100644
--- a/libraries/ESP8266SSDP/ESP8266SSDP.h
+++ b/libraries/ESP8266SSDP/ESP8266SSDP.h
@@ -92,6 +92,7 @@ class SSDPClass{
 
     UdpContext* _server;
     SSDPTimer* _timer;
+    uint16_t _port;
 
     IPAddress _respondToAddr;
     uint16_t  _respondToPort;
@@ -101,7 +102,6 @@ class SSDPClass{
     unsigned long _process_time;
     unsigned long _notify_time;
     
-    uint16_t _port;
     char _schemaURL[SSDP_SCHEMA_URL_SIZE];
     char _uuid[SSDP_UUID_SIZE];
     char _friendlyName[SSDP_FRIENDLY_NAME_SIZE];
diff --git a/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp b/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp
index de128d48e..fbc23016f 100644
--- a/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp
+++ b/libraries/ESP8266WebServer/src/ESP8266WebServer.cpp
@@ -33,6 +33,7 @@
 
 ESP8266WebServer::ESP8266WebServer(IPAddress addr, int port)
 : _server(addr, port)
+, _currentMethod(HTTP_ANY)
 , _currentHandler(0)
 , _firstHandler(0)
 , _lastHandler(0)
@@ -40,11 +41,13 @@ ESP8266WebServer::ESP8266WebServer(IPAddress addr, int port)
 , _currentArgs(0)
 , _headerKeysCount(0)
 , _currentHeaders(0)
+, _contentLength(0)
 {
 }
 
 ESP8266WebServer::ESP8266WebServer(int port)
 : _server(port)
+, _currentMethod(HTTP_ANY)
 , _currentHandler(0)
 , _firstHandler(0)
 , _lastHandler(0)
@@ -52,6 +55,7 @@ ESP8266WebServer::ESP8266WebServer(int port)
 , _currentArgs(0)
 , _headerKeysCount(0)
 , _currentHeaders(0)
+, _contentLength(0)
 {
 }
 
diff --git a/libraries/ESP8266WebServer/src/ESP8266WebServer.h b/libraries/ESP8266WebServer/src/ESP8266WebServer.h
index d1b902236..35287f307 100644
--- a/libraries/ESP8266WebServer/src/ESP8266WebServer.h
+++ b/libraries/ESP8266WebServer/src/ESP8266WebServer.h
@@ -146,23 +146,23 @@ protected:
   HTTPMethod  _currentMethod;
   String      _currentUri;
 
-  size_t           _currentArgCount;
-  RequestArgument* _currentArgs;
-  HTTPUpload       _currentUpload;
-
-  RequestArgument* _currentHeaders;
-  size_t           _headerKeysCount;
-  size_t           _contentLength;
-  String           _responseHeaders;
-
-  String           _hostHeader;
-
   RequestHandler*  _currentHandler;
   RequestHandler*  _firstHandler;
   RequestHandler*  _lastHandler;
   THandlerFunction _notFoundHandler;
   THandlerFunction _fileUploadHandler;
 
+  int              _currentArgCount;
+  RequestArgument* _currentArgs;
+  HTTPUpload       _currentUpload;
+
+  int              _headerKeysCount;
+  RequestArgument* _currentHeaders;
+  size_t           _contentLength;
+  String           _responseHeaders;
+
+  String           _hostHeader;
+
 };
 
 
diff --git a/libraries/ESP8266WebServer/src/Parsing.cpp b/libraries/ESP8266WebServer/src/Parsing.cpp
index a8f587495..26304946b 100644
--- a/libraries/ESP8266WebServer/src/Parsing.cpp
+++ b/libraries/ESP8266WebServer/src/Parsing.cpp
@@ -203,7 +203,7 @@ bool ESP8266WebServer::_parseRequest(WiFiClient& client) {
 }
 
 bool ESP8266WebServer::_collectHeader(const char* headerName, const char* headerValue) {
-  for (size_t i = 0; i < _headerKeysCount; i++) {
+  for (int i = 0; i < _headerKeysCount; i++) {
     if (_currentHeaders[i].key==headerName) {
             _currentHeaders[i].value=headerValue;
             return true;
@@ -226,7 +226,7 @@ void ESP8266WebServer::_parseArguments(String data) {
   }
   _currentArgCount = 1;
 
-  for (int i = 0; i < data.length(); ) {
+  for (int i = 0; i < (int)data.length(); ) {
     i = data.indexOf('&', i);
     if (i == -1)
       break;
diff --git a/libraries/ESP8266WebServer/src/detail/RequestHandlersImpl.h b/libraries/ESP8266WebServer/src/detail/RequestHandlersImpl.h
index 4ff6a3a42..ae94b259f 100644
--- a/libraries/ESP8266WebServer/src/detail/RequestHandlersImpl.h
+++ b/libraries/ESP8266WebServer/src/detail/RequestHandlersImpl.h
@@ -44,10 +44,10 @@ public:
     }
 
 protected:
-    String _uri;
-    HTTPMethod _method;
     ESP8266WebServer::THandlerFunction _fn;
     ESP8266WebServer::THandlerFunction _ufn;
+    String _uri;
+    HTTPMethod _method;
 };
 
 class StaticRequestHandler : public RequestHandler {
@@ -67,7 +67,7 @@ public:
         if (requestMethod != HTTP_GET)
             return false;
 
-        if (_isFile && requestUri != _uri || !requestUri.startsWith(_uri))
+        if ((_isFile && requestUri != _uri) || !requestUri.startsWith(_uri))
             return false;
 
         return true;
diff --git a/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp b/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp
index ef737c6d4..6d4365221 100644
--- a/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp
+++ b/libraries/ESP8266WiFi/src/WiFiClientSecure.cpp
@@ -311,7 +311,7 @@ bool WiFiClientSecure::verify(const char* fp, const char* url) {
     uint8_t sha1[20];
     int len = strlen(fp);
     int pos = 0;
-    for (int i = 0; i < sizeof(sha1); ++i) {
+    for (size_t i = 0; i < sizeof(sha1); ++i) {
         while (pos < len && fp[pos] == ' ') {
             ++pos;
         }
diff --git a/libraries/ESP8266WiFi/src/include/ClientContext.h b/libraries/ESP8266WiFi/src/include/ClientContext.h
index 283fa1057..2c26de832 100644
--- a/libraries/ESP8266WiFi/src/include/ClientContext.h
+++ b/libraries/ESP8266WiFi/src/include/ClientContext.h
@@ -309,9 +309,6 @@ class ClientContext {
         }
 
     private:
-        ClientContext* _next;
-        int _refcnt;
-
         tcp_pcb* _pcb;
 
         pbuf* _rx_buf;
@@ -320,6 +317,9 @@ class ClientContext {
         discard_cb_t _discard_cb;
         void* _discard_cb_arg;
 
+        int _refcnt;
+        ClientContext* _next;
+
         size_t _size_sent;
         bool _send_waiting;
 };
diff --git a/libraries/ESP8266WiFi/src/include/UdpContext.h b/libraries/ESP8266WiFi/src/include/UdpContext.h
index f7cebc86c..d9347fd34 100644
--- a/libraries/ESP8266WiFi/src/include/UdpContext.h
+++ b/libraries/ESP8266WiFi/src/include/UdpContext.h
@@ -365,22 +365,17 @@ private:
     }
 
 private:
-    int _refcnt;
     udp_pcb* _pcb;
-
-    ip_addr_t _dest_addr;
-    uint16_t _dest_port;
-
-    uint16_t _multicast_ttl;
-
-    bool _first_buf_taken;
     pbuf* _rx_buf;
+    bool _first_buf_taken;
     size_t _rx_buf_offset;
-
+    int _refcnt;
     pbuf* _tx_buf_head;
     pbuf* _tx_buf_cur;
     size_t _tx_buf_offset;
-
+    uint16_t _multicast_ttl;
+    uint16_t _dest_port;
+    ip_addr_t _dest_addr;
     rxhandler_t _on_rx;
 };
 
diff --git a/libraries/ESP8266mDNS/ESP8266mDNS.cpp b/libraries/ESP8266mDNS/ESP8266mDNS.cpp
index 92b041098..e11bae5b0 100644
--- a/libraries/ESP8266mDNS/ESP8266mDNS.cpp
+++ b/libraries/ESP8266mDNS/ESP8266mDNS.cpp
@@ -97,7 +97,7 @@ bool MDNSResponder::begin(const char* domain){
   }
 
   // Copy in domain characters as lowercase
-  for (int i = 0; i < n; ++i)
+  for (size_t i = 0; i < n; ++i)
     _hostName[i] = tolower(domain[i]);
   _hostName[n] = '\0';
 
@@ -190,7 +190,7 @@ void MDNSResponder::_parsePacket(){
 
   char serviceName[32];
   uint8_t serviceNameLen;
-  uint16_t servicePort;
+  uint16_t servicePort = 0;
 
   char protoName[32];
   uint8_t protoNameLen;
@@ -367,7 +367,7 @@ void MDNSResponder::_parsePacket(){
     else if(questions[i] == MDNS_TYPE_PTR) responseMask |= 0xF;
   }
 
-  return _reply(responseMask, (serviceName), (protoName), servicePort);
+  return _reply(responseMask, serviceName, protoName, servicePort);
 }
 
 void MDNSResponder::enableArduino(uint16_t port, bool auth){
@@ -461,12 +461,12 @@ void MDNSResponder::_reply(uint8_t replyMask, char * service, char *proto, uint1
       
       char boardName[64];
       const char *boardExtra = "board=";
-      os_sprintf(boardName, "%s%s\0", boardExtra, ARDUINO_BOARD);
+      os_sprintf(boardName, "%s%s", boardExtra, ARDUINO_BOARD);
       uint8_t boardNameLen = os_strlen(boardName);
 
       char authUpload[16];
       const char *authUploadExtra = "auth_upload=";
-      os_sprintf(authUpload, "%s%s\0", authUploadExtra, reinterpret_cast<const char*>((_arduinoAuth)?"yes":"no"));
+      os_sprintf(authUpload, "%s%s", authUploadExtra, reinterpret_cast<const char*>((_arduinoAuth)?"yes":"no"));
       uint8_t authUploadLen = os_strlen(authUpload);
     
       uint16_t textDataLen = (1 + boardNameLen) + (1 + tcpCheckExtraLen) + (1 + sshUploadExtraLen) + (1 + authUploadLen);