| /* | |
| WiFiClientStream.h | |
| An Arduino Stream that wraps an instance of a WiFiClient. For use | |
| with legacy Arduino WiFi shield and other boards and shields that | |
| are compatible with the Arduino WiFi library. | |
| Copyright (C) 2016 Jens B. All rights reserved. | |
| 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. | |
| See file LICENSE.txt for further informations on licensing terms. | |
| Parts of this class are based on | |
| - EthernetClientStream - Copyright (C) 2013 Norbert Truchsess. All rights reserved. | |
| published under the same license. | |
| Last updated April 23rd, 2016 | |
| */ | |
| class WiFiClientStream : public WiFiStream | |
| { | |
| protected: | |
| uint32_t _time_connect = 0; | |
| /** | |
| * check if TCP client is connected | |
| * @return true if connected | |
| */ | |
| virtual inline bool connect_client() | |
| { | |
| if ( _connected ) | |
| { | |
| if ( _client && _client.connected() ) return true; | |
| stop(); | |
| } | |
| // active TCP connect | |
| if ( WiFi.status() == WL_CONNECTED ) | |
| { | |
| // if the client is disconnected, try to reconnect every 5 seconds | |
| if ( millis() - _time_connect >= MILLIS_RECONNECT ) | |
| { | |
| _connected = _client.connect( _remote_ip, _port ); | |
| if ( !_connected ) | |
| { | |
| _time_connect = millis(); | |
| } | |
| else if ( _currentHostConnectionCallback ) | |
| { | |
| (*_currentHostConnectionCallback)(HOST_CONNECTION_CONNECTED); | |
| } | |
| } | |
| } | |
| return _connected; | |
| } | |
| public: | |
| /** | |
| * create a WiFi stream with a TCP client | |
| */ | |
| WiFiClientStream(IPAddress server_ip, uint16_t server_port) : WiFiStream(server_ip, server_port) {} | |
| /** | |
| * maintain WiFi and TCP connection | |
| * @return true if WiFi and TCP connection are established | |
| */ | |
| virtual inline bool maintain() | |
| { | |
| return connect_client(); | |
| } | |
| /** | |
| * stop client connection | |
| */ | |
| virtual inline void stop() | |
| { | |
| if ( _client) | |
| { | |
| _client.stop(); | |
| if ( _currentHostConnectionCallback ) | |
| { | |
| (*_currentHostConnectionCallback)(HOST_CONNECTION_DISCONNECTED); | |
| } | |
| } | |
| _connected = false; | |
| _time_connect = millis(); | |
| } | |
| }; | |