diff --git a/README.md b/README.md
index c8cbb5217..91af606c5 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@ Arduino core for ESP8266 WiFi chip
 
 # Quick links
 
-- [Latest release documentation](https://arduino-esp8266.readthedocs.io/en/2.7.2/)
+- [Latest release documentation](https://arduino-esp8266.readthedocs.io/en/2.7.4_a/)
 - [Current "git version" documentation](https://arduino-esp8266.readthedocs.io/en/latest/)
 - [Install git version](https://arduino-esp8266.readthedocs.io/en/latest/installing.html#using-git-version) ([sources](doc/installing.rst#using-git-version))
 
@@ -36,7 +36,7 @@ Starting with 1.6.4, Arduino allows installation of third-party platform package
 #### Latest release [![Latest release](https://img.shields.io/github/release/esp8266/Arduino.svg)](https://github.com/esp8266/Arduino/releases/latest/)
 Boards manager link: `https://arduino.esp8266.com/stable/package_esp8266com_index.json`
 
-Documentation: [https://arduino-esp8266.readthedocs.io/en/2.7.2/](https://arduino-esp8266.readthedocs.io/en/2.7.2/)
+Documentation: [https://arduino-esp8266.readthedocs.io/en/2.7.4_a/](https://arduino-esp8266.readthedocs.io/en/2.7.4_a/)
 
 ### Using git version
 [![Linux build status](https://travis-ci.org/esp8266/Arduino.svg)](https://travis-ci.org/esp8266/Arduino)
diff --git a/cores/esp8266/Print.cpp b/cores/esp8266/Print.cpp
index b0e2e31a1..186d6e1cb 100644
--- a/cores/esp8266/Print.cpp
+++ b/cores/esp8266/Print.cpp
@@ -146,35 +146,39 @@ size_t Print::print(unsigned int n, int base) {
 }
 
 size_t Print::print(long n, int base) {
-    if(base == 0) {
-        return write(n);
-    } else if(base == 10) {
-        if(n < 0) {
-            int t = print('-');
-            n = -n;
-            return printNumber(n, 10) + t;
-        }
-        return printNumber(n, 10);
-    } else {
-        return printNumber(n, base);
+    int t = 0;
+    if (base == 10 && n < 0) {
+        t = print('-');
+        n = -n;
     }
+    return printNumber(static_cast<unsigned long>(n), base) + t;
 }
 
 size_t Print::print(unsigned long n, int base) {
-    if(base == 0)
+    if (base == 0) {
         return write(n);
-    else
-        return printNumber(n, base);
+    }
+    return printNumber(n, base);
+}
+
+size_t Print::print(long long n, int base) {
+    int t = 0;
+    if (base == 10 && n < 0) {
+        t = print('-');
+        n = -n;
+    }
+    return printNumber(static_cast<unsigned long long>(n), base) + t;
+}
+
+size_t Print::print(unsigned long long n, int base) {
+    if (base == 0) {
+        return write(n);
+    }
+    return printNumber(n, base);
 }
 
 size_t Print::print(double n, int digits) {
-    return printFloat(n, digits);
-}
-
-size_t Print::println(const __FlashStringHelper *ifsh) {
-    size_t n = print(ifsh);
-    n += println();
-    return n;
+    return printNumber(n, digits);
 }
 
 size_t Print::print(const Printable& x) {
@@ -185,89 +189,90 @@ size_t Print::println(void) {
     return print("\r\n");
 }
 
+size_t Print::println(const __FlashStringHelper* ifsh) {
+    return _println<const __FlashStringHelper*>(ifsh);
+}
+
 size_t Print::println(const String &s) {
-    size_t n = print(s);
-    n += println();
-    return n;
+    return _println(s);
 }
 
 size_t Print::println(const char c[]) {
-    size_t n = print(c);
-    n += println();
-    return n;
+    return _println(c);
 }
 
 size_t Print::println(char c) {
-    size_t n = print(c);
-    n += println();
-    return n;
+    return _println(c);
 }
 
 size_t Print::println(unsigned char b, int base) {
-    size_t n = print(b, base);
-    n += println();
-    return n;
+    return _println(b, base);
 }
 
 size_t Print::println(int num, int base) {
-    size_t n = print(num, base);
-    n += println();
-    return n;
+    return _println(num, base);
 }
 
 size_t Print::println(unsigned int num, int base) {
-    size_t n = print(num, base);
-    n += println();
-    return n;
+    return _println(num, base);
 }
 
 size_t Print::println(long num, int base) {
-    size_t n = print(num, base);
-    n += println();
-    return n;
+    return _println(num, base);
 }
 
 size_t Print::println(unsigned long num, int base) {
-    size_t n = print(num, base);
-    n += println();
-    return n;
+    return _println(num, base);
+}
+
+size_t Print::println(long long num, int base) {
+    return _println(num, base);
+}
+
+size_t Print::println(unsigned long long num, int base) {
+    return _println(num, base);
 }
 
 size_t Print::println(double num, int digits) {
-    size_t n = print(num, digits);
-    n += println();
-    return n;
+    return _println(num, digits);
 }
 
 size_t Print::println(const Printable& x) {
-    size_t n = print(x);
-    n += println();
-    return n;
+    return _println<const Printable&>(x);
 }
 
 // Private Methods /////////////////////////////////////////////////////////////
 
-size_t Print::printNumber(unsigned long n, uint8_t base) {
-    char buf[8 * sizeof(long) + 1]; // Assumes 8-bit chars plus zero byte.
-    char *str = &buf[sizeof(buf) - 1];
+template<typename T, typename... P> inline size_t Print::_println(T v, P... args)
+{
+    size_t n = print(v, args...);
+    n += println();
+    return n;
+};
+
+template<typename T> size_t Print::printNumber(T n, uint8_t base) {
+    char buf[8 * sizeof(n) + 1]; // Assumes 8-bit chars plus zero byte.
+    char* str = &buf[sizeof(buf) - 1];
 
     *str = '\0';
 
     // prevent crash if called with base == 1
-    if(base < 2)
+    if (base < 2) {
         base = 10;
+    }
 
     do {
-        unsigned long m = n;
+        auto m = n;
         n /= base;
         char c = m - base * n;
+
         *--str = c < 10 ? c + '0' : c + 'A' - 10;
-    } while(n);
+    } while (n);
 
     return write(str);
 }
 
-size_t Print::printFloat(double number, uint8_t digits) {
+template<> size_t Print::printNumber(double number, uint8_t digits) {
     char buf[40];
     return write(dtostrf(number, 0, digits, buf));
 }
diff --git a/cores/esp8266/Print.h b/cores/esp8266/Print.h
index e43883b39..e49332b31 100644
--- a/cores/esp8266/Print.h
+++ b/cores/esp8266/Print.h
@@ -36,9 +36,9 @@
 class Print {
     private:
         int write_error;
-        size_t printNumber(unsigned long, uint8_t);
-        size_t printFloat(double, uint8_t);
-    protected:
+        template<typename T> size_t printNumber(T n, uint8_t base);
+        template<typename T, typename... P> inline size_t _println(T v, P... args);
+protected:
         void setWriteError(int err = 1) {
             write_error = err;
         }
@@ -71,6 +71,8 @@ class Print {
         inline size_t write(unsigned int t) { return write((uint8_t)t); }
         inline size_t write(long t) { return write((uint8_t)t); }
         inline size_t write(unsigned long t) { return write((uint8_t)t); }
+        inline size_t write(long long t) { return write((uint8_t)t); }
+        inline size_t write(unsigned long long t) { return write((uint8_t)t); }
         // Enable write(char) to fall through to write(uint8_t)
         inline size_t write(char c) { return write((uint8_t) c); }
         inline size_t write(int8_t c) { return write((uint8_t) c); }
@@ -86,6 +88,8 @@ class Print {
         size_t print(unsigned int, int = DEC);
         size_t print(long, int = DEC);
         size_t print(unsigned long, int = DEC);
+        size_t print(long long, int = DEC);
+        size_t print(unsigned long long, int = DEC);
         size_t print(double, int = 2);
         size_t print(const Printable&);
 
@@ -98,6 +102,8 @@ class Print {
         size_t println(unsigned int, int = DEC);
         size_t println(long, int = DEC);
         size_t println(unsigned long, int = DEC);
+        size_t println(long long, int = DEC);
+        size_t println(unsigned long long, int = DEC);
         size_t println(double, int = 2);
         size_t println(const Printable&);
         size_t println(void);
@@ -105,4 +111,6 @@ class Print {
         virtual void flush() { /* Empty implementation for backward compatibility */ }
 };
 
+template<> size_t Print::printNumber(double number, uint8_t digits);
+
 #endif
diff --git a/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp b/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp
index 580964da1..7ec3ab86f 100644
--- a/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp
+++ b/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.cpp
@@ -28,62 +28,12 @@
 #include <StreamString.h>
 #include <base64.h>
 
-class TransportTraits
-{
-public:
-    virtual ~TransportTraits()
-    {
-    }
-
-    virtual std::unique_ptr<WiFiClient> create()
-    {
-        return std::unique_ptr<WiFiClient>(new WiFiClient());
-    }
-
-    virtual bool verify(WiFiClient& client, const char* host)
-    {
-        (void)client;
-        (void)host;
-        return true;
-    }
-};
-
-
-class BearSSLTraits : public TransportTraits
-{
-public:
-    BearSSLTraits(const uint8_t fingerprint[20])
-    {
-        memcpy(_fingerprint, fingerprint, sizeof(_fingerprint));
-    }
-
-    std::unique_ptr<WiFiClient> create() override
-    {
-        BearSSL::WiFiClientSecure *client = new BearSSL::WiFiClientSecure();
-        client->setFingerprint(_fingerprint);
-        return std::unique_ptr<WiFiClient>(client);
-    }
-
-    bool verify(WiFiClient& client, const char* host) override
-    {
-        // No-op.  BearSSL will not connect if the fingerprint doesn't match.
-        // So if you get to here you've already connected and it matched
-        (void) client;
-        (void) host;
-        return true;
-    }
-
-protected:
-    uint8_t _fingerprint[20];
-};
-
 /**
  * constructor
  */
 HTTPClient::HTTPClient()
     : _client(nullptr), _userAgent(F("ESP8266HTTPClient"))
 {
-    _tcpDeprecated.reset(nullptr);
 }
 
 /**
@@ -117,12 +67,6 @@ void HTTPClient::clear()
  * @return success bool
  */
 bool HTTPClient::begin(WiFiClient &client, const String& url) {
-    if(_tcpDeprecated) {
-        DEBUG_HTTPCLIENT("[HTTP-Client][begin] mix up of new and deprecated api\n");
-        _canReuse = false;
-        end();
-    }
-
     _client = &client;
 
     // check for : (http: or https:)
@@ -154,12 +98,6 @@ bool HTTPClient::begin(WiFiClient &client, const String& url) {
  */
 bool HTTPClient::begin(WiFiClient &client, const String& host, uint16_t port, const String& uri, bool https)
 {
-    if(_tcpDeprecated) {
-        DEBUG_HTTPCLIENT("[HTTP-Client][begin] mix up of new and deprecated api\n");
-        _canReuse = false;
-        end();
-    }
-
     _client = &client;
 
      clear();
@@ -171,52 +109,6 @@ bool HTTPClient::begin(WiFiClient &client, const String& host, uint16_t port, co
 }
 
 
-bool HTTPClient::begin(String url, const uint8_t httpsFingerprint[20])
-{
-    if(_client && !_tcpDeprecated) {
-        DEBUG_HTTPCLIENT("[HTTP-Client][begin] mix up of new and deprecated api\n");
-        _canReuse = false;
-        end();
-    }
-
-    if (!beginInternal(url, "https")) {
-        return false;
-    }
-    _transportTraits = TransportTraitsPtr(new (std::nothrow) BearSSLTraits(httpsFingerprint));
-    if(!_transportTraits) {
-        DEBUG_HTTPCLIENT("[HTTP-Client][begin] could not create transport traits\n");
-        return false;
-    }
-
-    DEBUG_HTTPCLIENT("[HTTP-Client][begin] BearSSL-httpsFingerprint:");
-    for (size_t i=0; i < 20; i++) {
-        DEBUG_HTTPCLIENT(" %02x", httpsFingerprint[i]);
-    }
-    DEBUG_HTTPCLIENT("\n");
-    return true;
-}
-
-
-/**
- * parsing the url for all needed parameters
- * @param url String
- */
-bool HTTPClient::begin(String url)
-{
-    if(_client && !_tcpDeprecated) {
-        DEBUG_HTTPCLIENT("[HTTP-Client][begin] mix up of new and deprecated api\n");
-        _canReuse = false;
-        end();
-    }
-
-    if (!beginInternal(url, "http")) {
-        return false;
-    }
-    _transportTraits = TransportTraitsPtr(new TransportTraits());
-    return true;
-}
-
-
 bool HTTPClient::beginInternal(const String& __url, const char* expectedProtocol)
 {
     String url(__url);
@@ -278,47 +170,6 @@ bool HTTPClient::beginInternal(const String& __url, const char* expectedProtocol
 }
 
 
-bool HTTPClient::begin(String host, uint16_t port, String uri)
-{
-    if(_client && !_tcpDeprecated) {
-        DEBUG_HTTPCLIENT("[HTTP-Client][begin] mix up of new and deprecated api\n");
-        _canReuse = false;
-        end();
-    }
-
-    clear();
-    _host = host;
-    _port = port;
-    _uri = uri;
-    _transportTraits = TransportTraitsPtr(new TransportTraits());
-    DEBUG_HTTPCLIENT("[HTTP-Client][begin] host: %s port: %d uri: %s\n", host.c_str(), port, uri.c_str());
-    return true;
-}
-
-
-bool HTTPClient::begin(String host, uint16_t port, String uri, const uint8_t httpsFingerprint[20])
-{
-    if(_client && !_tcpDeprecated) {
-        DEBUG_HTTPCLIENT("[HTTP-Client][begin] mix up of new and deprecated api\n");
-        _canReuse = false;
-        end();
-    }
-
-    clear();
-    _host = host;
-    _port = port;
-    _uri = uri;
-
-    _transportTraits = TransportTraitsPtr(new BearSSLTraits(httpsFingerprint));
-    DEBUG_HTTPCLIENT("[HTTP-Client][begin] host: %s port: %d url: %s BearSSL-httpsFingerprint:", host.c_str(), port, uri.c_str());
-    for (size_t i=0; i < 20; i++) {
-        DEBUG_HTTPCLIENT(" %02x", httpsFingerprint[i]);
-    }
-    DEBUG_HTTPCLIENT("\n");
-    return true;
-}
-
-
 /**
  * end
  * called after the payload is handled
@@ -353,10 +204,6 @@ void HTTPClient::disconnect(bool preserveClient)
                     _client = nullptr;
                 }
             }
-            if(_tcpDeprecated) {
-                _transportTraits.reset(nullptr);
-                _tcpDeprecated.reset(nullptr);
-            }
         }
     } else {
         if (!preserveClient && _client) { // Also destroy _client if not connected()
@@ -460,15 +307,6 @@ bool HTTPClient::setURL(const String& url)
     return beginInternal(url, nullptr);
 }
 
-/**
- * set true to follow redirects.
- * @param follow
- * @deprecated
- */
-void HTTPClient::setFollowRedirects(bool follow)
-{
-    _followRedirects = follow ? HTTPC_STRICT_FOLLOW_REDIRECTS : HTTPC_DISABLE_FOLLOW_REDIRECTS;
-}
 /**
  * set redirect follow mode. See `followRedirects_t` enum for avaliable modes.
  * @param follow
@@ -1116,15 +954,6 @@ bool HTTPClient::connect(void)
         return true;
     }
 
-    if(!_client && _transportTraits) {
-        _tcpDeprecated = _transportTraits->create();
-        if(!_tcpDeprecated) {
-            DEBUG_HTTPCLIENT("[HTTP-Client] connect: could not create tcp\n");
-            return false;
-        }
-        _client = _tcpDeprecated.get();
-    }
-
     if(!_client) {
         DEBUG_HTTPCLIENT("[HTTP-Client] connect: HTTPClient::begin was not called or returned error\n");
         return false;
@@ -1139,12 +968,6 @@ bool HTTPClient::connect(void)
 
     DEBUG_HTTPCLIENT("[HTTP-Client] connected to %s:%u\n", _host.c_str(), _port);
 
-    if (_tcpDeprecated && !_transportTraits->verify(*_tcpDeprecated, _host.c_str())) {
-        DEBUG_HTTPCLIENT("[HTTP-Client] transport level verify failed\n");
-        _client->stop();
-        return false;
-    }
-
 #ifdef ESP8266
     _client->setNoDelay(true);
 #endif
diff --git a/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h b/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h
index 5dd3df5fb..9699b92b5 100644
--- a/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h
+++ b/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h
@@ -163,14 +163,12 @@ public:
     bool begin(WiFiClient &client, const String& url);
     bool begin(WiFiClient &client, const String& host, uint16_t port, const String& uri = "/", bool https = false);
 
-    // Plain HTTP connection, unencrypted
-    bool begin(String url)  __attribute__ ((deprecated));
-    bool begin(String host, uint16_t port, String uri = "/")  __attribute__ ((deprecated));
-    // Use BearSSL for secure HTTPS connection
-    bool begin(String url, const uint8_t httpsFingerprint[20])  __attribute__ ((deprecated));
-    bool begin(String host, uint16_t port, String uri, const uint8_t httpsFingerprint[20])  __attribute__ ((deprecated));
-    // deprecated, use the overload above instead
-    bool begin(String host, uint16_t port, String uri, bool https, String httpsFingerprint)  __attribute__ ((deprecated));
+    // old API is now explicitely forbidden
+    bool begin(String url)  __attribute__ ((error("obsolete API, use ::begin(WiFiClient, url)")));
+    bool begin(String host, uint16_t port, String uri = "/")  __attribute__ ((error("obsolete API, use ::begin(WiFiClient, host, port, uri)")));
+    bool begin(String url, const uint8_t httpsFingerprint[20])  __attribute__ ((error("obsolete API, use ::begin(WiFiClientSecure, ...)")));
+    bool begin(String host, uint16_t port, String uri, const uint8_t httpsFingerprint[20])  __attribute__ ((error("obsolete API, use ::begin(WiFiClientSecure, ...)")));
+    bool begin(String host, uint16_t port, String uri, bool https, String httpsFingerprint)  __attribute__ ((error("obsolete API, use ::begin(WiFiClientSecure, ...)")));
 
     void end(void);
 
@@ -183,7 +181,6 @@ public:
     void setTimeout(uint16_t timeout);
 
     // Redirections
-    void setFollowRedirects(bool follow) __attribute__ ((deprecated));
     void setFollowRedirects(followRedirects_t follow);
     void setRedirectLimit(uint16_t limit); // max redirects to follow for a single request
 
@@ -237,9 +234,6 @@ protected:
     int handleHeaderResponse();
     int writeToStreamDataBlock(Stream * stream, int len);
 
-
-    TransportTraitsPtr _transportTraits;
-    std::unique_ptr<WiFiClient> _tcpDeprecated;
     WiFiClient* _client;
 
     /// request handling
diff --git a/libraries/ESP8266mDNS/src/ESP8266mDNS.h b/libraries/ESP8266mDNS/src/ESP8266mDNS.h
index 2e0e1fcec..ec1242338 100644
--- a/libraries/ESP8266mDNS/src/ESP8266mDNS.h
+++ b/libraries/ESP8266mDNS/src/ESP8266mDNS.h
@@ -42,6 +42,9 @@
 
 */
 
+#ifndef __ESP8266MDNS_H
+#define __ESP8266MDNS_H
+
 enum class MDNSApiVersion { LEA, LEAv2 };
 
 #include "LEAmDNS.h"            // LEA
@@ -57,3 +60,5 @@ using MDNSResponder = esp8266::MDNSImplementation::MDNSResponder;
 
 extern MDNSResponder MDNS;
 #endif
+
+#endif // __ESP8266MDNS_H