session_->add_datafeed_callback([=]
(shared_ptr<Device> device, shared_ptr<Packet> packet) {
data_feed_in(device, packet);
});
update_signals(device);
session_->add_datafeed_callback([=]
(shared_ptr<Device> device, shared_ptr<Packet> packet) {
data_feed_in(device, packet);
});
update_signals(device);