private void connectDevices() {
    NetconfProviderConfig cfg = cfgService.getConfig(appId, NetconfProviderConfig.class);
    if (cfg != null) {
      try {
        cfg.getDevicesAddresses()
            .stream()
            .forEach(
                addr -> {
                  try {
                    NetconfDeviceInfo netconf =
                        new NetconfDeviceInfo(addr.name(), addr.password(), addr.ip(), addr.port());
                    controller.connectDevice(netconf);
                    Device device = deviceService.getDevice(netconf.getDeviceId());
                    if (device.is(PortDiscovery.class)) {
                      PortDiscovery portConfig = device.as(PortDiscovery.class);
                      if (portConfig != null) {
                        providerService.updatePorts(netconf.getDeviceId(), portConfig.getPorts());
                      }
                    } else {
                      log.warn("No portGetter behaviour for device {}", netconf.getDeviceId());
                    }

                  } catch (IOException e) {
                    throw new RuntimeException(
                        new NetconfException(
                            "Can't connect to NETCONF "
                                + "device on "
                                + addr.ip()
                                + ":"
                                + addr.port(),
                            e));
                  }
                });

      } catch (ConfigException e) {
        log.error("Cannot read config error " + e);
      }
    }
  }