17 articles
Data Sources
How Infohub Retrieves DataConnections, tag namespaces, query placeholders, and what actually happens when the engine asks for a period.Choosing a Data SourceAll 31 connectors, what each is for, and how to decide when a system can be reached more than one way.Data Source Capability MatrixWhich of the 31 data sources support which capabilities, read from the connector source.Wonderware / AVEVA HistorianConnecting to AVEVA (Wonderware) Historian, the client library dependency, and which of the four connectors to use.Canary HistorianTwo connectors for two API generations — choosing between them, and configuring the one you need.Ignition HistorianInfohub reads Ignition's historian database directly — which database engines are supported, and why the gateway name matters.OPC UA and OPC HDAThree OPC connectors — live UA, historical UA, and classic HDA — and the certificate trust step that catches everyone.SQL DatabasesReading SQL Server, Oracle, PostgreSQL, and MySQL — writing queries that return the right period, and the placeholders that make them templatable.The Flow Historian SimulatorRealistic simulated plant data that ships with Infohub — the right way to learn, demonstrate, and test.Connection Property ReferenceEvery configurable property declared by all 31 Infohub data source connectors.MQTT and Sparkplug BSubscribing to a broker — topic namespaces, JSON payloads, quality of service, and why a subscription means history starts now.Timebase HistorianReading Flow Software's own time series database — datasets, TLS, and the identity provider.Web Service Data SourcesReading any REST or HTTP API — endpoints, JSON paths, headers, timestamp units, and response caching.OAuth 2.0 for Web Service SourcesGrant types, client authentication methods, and Private Key JWT — configuring OAuth 2.0 without guesswork.Cloud Time Series and IoT PlatformsSnowflake, InfluxDB, AWS Timestream, Mindsphere, Netilion, Kafka and the rest — what they share and what to watch.Files and SpreadsheetsReading Excel files with the connector — and an honest case for using manual entry instead.Redundant Data SourcesOne measure, more than one place its data can come from — the multiple-retrievals mechanism, what it is for, and what it is not.