/Development/Arduino/libraries/pubsubclient/src/MQTT.cpp: In member function 'bool MQTT::Message::send(Client&)':
//Development/Arduino/libraries/pubsubclient/src/MQTT.cpp:123:5: error: 'sent' was not >declared in this scope
sent = client.write(const_cast<const uint8_t*>(packet), packet_length);
^
Error compiling.