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diff --git a/libraries/ESPAsyncTCP/src/AsyncPrinter.h b/libraries/ESPAsyncTCP/src/AsyncPrinter.h
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+++ b/libraries/ESPAsyncTCP/src/AsyncPrinter.h
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+/*
+  Asynchronous TCP library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef ASYNCPRINTER_H_
+#define ASYNCPRINTER_H_
+
+#include "Arduino.h"
+#include "ESPAsyncTCP.h"
+#include "cbuf.h"
+
+class AsyncPrinter;
+
+typedef std::function<void(void*, AsyncPrinter*, uint8_t*, size_t)> ApDataHandler;
+typedef std::function<void(void*, AsyncPrinter*)> ApCloseHandler;
+
+class AsyncPrinter: public Print {
+  private:
+    AsyncClient *_client;
+    ApDataHandler _data_cb;
+    void *_data_arg;
+    ApCloseHandler _close_cb;
+    void *_close_arg;
+    cbuf *_tx_buffer;
+    size_t _tx_buffer_size;
+
+    void _onConnect(AsyncClient *c);
+  public:
+    AsyncPrinter *next;
+
+    AsyncPrinter();
+    AsyncPrinter(AsyncClient *client, size_t txBufLen = TCP_MSS);
+    virtual ~AsyncPrinter();
+
+    int connect(IPAddress ip, uint16_t port);
+    int connect(const char *host, uint16_t port);
+
+    void onData(ApDataHandler cb, void *arg);
+    void onClose(ApCloseHandler cb, void *arg);
+
+    operator bool();
+    AsyncPrinter & operator=(const AsyncPrinter &other);
+
+    size_t write(uint8_t data);
+    size_t write(const uint8_t *data, size_t len);
+
+    bool connected();
+    void close();
+
+    size_t _sendBuffer();
+    void _onData(void *data, size_t len);
+    void _on_close();
+    void _attachCallbacks();
+};
+
+#endif /* ASYNCPRINTER_H_ */