Factory floors, building automation, and edge gateways rarely speak one protocol. Nodlyn ships native connectors for the stacks teams already deploy — Modbus, OPC UA, Siemens S7, MQTT, serial buses, CAN, BACnet, and more — inside the same visual canvas you use for Slack alerts and approval gates.
This hub groups our industrial and field-protocol guides. Each article focuses on a real integration pattern (not just parameter lists). Start here, then open the connector that matches your hardware.
PLCs and SCADA
- Polling Siemens S7 PLCs: Tag Read/Write Over S7comm — cyclic reads, write setpoints, alarm on out-of-range values.
- OPC UA on the Shop Floor: Browse PLCs and Write Setpoints — browse nodes, read telemetry, write commands to gateways and SCADA servers.
Field buses and serial
- RS232/RS485 Serial Devices: Framed Read/Write Workflows — meters, weigh scales, and legacy UART peripherals.
- Raspberry Pi GPIO Triggers: Rising, Falling, and Edge Events — buttons, dry contacts, and SBC hardware events.
- Warehouse Barcode Scans: Parse, Route, and Trigger Workflows — serial scanners feeding inventory and ticketing flows.
Network discovery and messaging
- Zero-Config LAN Discovery: mDNS Browse and Resolve — find printers, cameras, and IoT brokers without hard-coded IPs.
- MQTT Publish/Subscribe in Production Workflows — motion-to-ticket example and migration notes from Home Assistant stacks.
- Building IoT Workflows with MQTT in Nodlyn — three field-tested patterns (alerts, command-and-ack, edge brokers).
Secure remote operations
- Remote Server Ops: SSH Command Execution from Workflows — capture stdout/stderr with approval gates.
- Secure File Transfers: SFTP Read and Write in Automations — poll drop folders, push reports, filter by extension.
- JWT Signing and Verification for Workflow APIs — secure ingress webhooks and service-to-service calls.
Edge AI and payments
- On-Prem LLM Text Generation with Ollama-Compatible Models — classify alarms or summarize logs without cloud inference.
- Stripe Payments in Workflows: Intents, Refunds, and Webhooks — tie physical events to billing when you sell managed automation.
Next steps
Load a starter template from the Template Library (Modbus #128, CAN Bus #225, OPC UA #137, BACnet #142, Serial #117), or ask the AI Workflow Assistant to assemble a graph in plain English. Export to a runtime agent when the workflow must run 24/7 on-site.
Platform scale: 200+ connectors & blocks and 200+ workflow templates — same library in Studio, cloud admin, and edge runtime exports.