Blog
Diagnosing Modbus Degradation: From CRC Errors to TCP Timeouts
Modbus doesn't fail loudly. It drifts. This guide covers how to diagnose serial vs. TCP failures, eliminate dead device overhead, and build the metrics layer that tells you something is wrong before your operators do.
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Most Modbus Polling Setups Are Wrong: Here's How to Fix Yours
Most Modbus polling problems aren't hardware failures. They're three configuration mistakes made at commissioning and never revisited. Here's how to fix them.
Why OPC UA Is Not Replacing Modbus (Yet)
OPC UA has every technical advantage. Modbus is still winning. Here's why the replacement hasn't happened and what would actually change that.
Modbus TCP vs Modbus RTU: Reliability, Latency, and Failure Modes
A practical engineering guide to choosing between Modbus RTU and Modbus TCP, covering real latency numbers, failure modes that hide in plain sight, and how each protocol behaves when things go wrong.
Why Modbus Refuses to Die
Learn why Modbus, a 47-year-old protocol with zero security, still dominates industrial automation despite billions invested in modern alternatives
How to Connect Any PLC to MQTT in Under an Hour
Learn how to extract data from Siemens, Allen-Bradley, Omron, Mitsubishi, OPC UA, and Modbus, transform it, and publish to MQTT using FlowFuse, without expensive gateways or consultants.
Modbus RTU (RS485/RS422/RS232) Communications with FlowFuse
Learn how to connect Modbus RTU devices to Node-RED with FlowFuse. This guide covers Modbus basics, serial setup, register mapping, and reading/writing data for industrial automation and IIoT.
How to Bridge Modbus to MQTT: Step-by-Step Guide
Learn how to bridge Modbus data to MQTT in 2026 and publish it to a Unified Namespace (UNS) using FlowFuse for real-time monitoring and cloud integration.
Best Practices Integrating a Modbus Device With Node-RED (2026)
Modbus is a widely adopted protocol for accessing data from existing legacy manufacturing equipment. Node-RED makes it very easy to connect to Modbus enabled equipment. However, there are some best practices we have developed to maintain system integrity when integrating Modbus devices with Node-RED