Imports github.com/gopcua/opcua github.com/gopcua/opcua/id github.com/gopcua/opcua/ua github.com/mainflux/mainflux/logger github.com/mainflux/mainflux/opcua github.com/mainflux/mainflux/pkg/errors github.com/mainflux/mainflux/pkg/messaging Standard library imports context fmt strconv time