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A diagram explaining the MQTT publish/subscribe model, showing an IoT gateway (publisher) sending data to an MQTT broker, which then distributes it to subscribers.

MQTT and the IoT Gateway: The Perfect Pair for IIoT Communication

Why is MQTT the standard for IIoT? Learn how an IoT Gateway uses MQTT's pub/sub model for efficient, reliable data from PLCs (Modbus) to the...

Robert Liao
Architecture showing an IoT Gateway acting as an OPC UA server, polling legacy Modbus/S7 devices and providing a single, modern OPC UA interface for SCADA/MES.

OPC UA and the IoT Gateway: Bridging the IT/OT Divide with a Standard Protocol

OPC UA is the standard for industrial data. See how an IoT Gateway acts as a secure OPC UA gateway, bridging the IT/OT divide by...

Robert Liao
A TCO comparison showing how an IoT Gateway simplifies Allen-Bradley PLC data collection and reduces cost by eliminating expensive middleware servers.

Allen-Bradley EtherNet/IP: Integrating Your PLC with an IoT Gateway

Struggling with Allen-Bradley PLC data collection? This guide shows how an IoT Gateway bypasses middleware to read EtherNet/IP tags from ControlLogix/CompactLogix PLCs. ...

Robert Liao
A diagram comparing a closed proprietary IoT Gateway (a jail) to an open os iot gateway (a workshop for developers), highlighting the lack of freedom.

IoT Gateway Software: Why an Open OS (like Debian) is Critical for Developers

Why is an open os iot gateway critical? Learn how iot gateway software based on Debian (like RobustOS Pro) with Docker beats proprietary firmware for...

Robert Liao
Architecture diagram showing an IoT Gateway enabling both S7 communication for PLC data collection to the cloud and secure remote access for engineers.

How an IoT Gateway Connects to Siemens S7-1200/1500 PLCs

Need PLC data collection from a Siemens S7-1200? This guide shows how an IoT Gateway handles S7 communication and translates PLC data blocks to MQTT....

Robert Liao
Infographic showing an IoT Gateway as a translator, converting confusing Modbus RTU/TCP data from PLCs into clean MQTT/JSON for the cloud.

The IoT Gateway as Translator: A Practical Guide to Modbus RTU/TCP Conversion

Learn how an IoT Gateway acts as a modbus tcp gateway for modbus rtu to tcp conversion. This guide shows how an IoT Gateway translates...

Robert Liao
Infographic showing a cellular IoT gateway connecting remote (oil pump), mobile (truck), and temporary (construction) assets to the cloud via 4G/5G.

What is a Cellular IoT Gateway? Why 4G/5G Is Critical for Industrial Data

What is a cellular IoT gateway? Learn how 4G/5G-enabled IoT Gateway devices provide critical, flexible, and secure connectivity for remote industrial data. ...

Robert Liao
Architecture diagram showing how an IoT Gateway partners with a PLC, enabling both PLC remote access for engineers and PLC data collection for the cloud.

IoT Gateway vs. PLC: Can an Industrial IoT Gateway Replace Your Controller?

IoT gateway vs PLC: Can an IoT Gateway replace your PLC? Short answer: no. Learn the critical difference between real-time control (PLC) and data handling...

Robert Liao
A visual hierarchy from a simple router, to a standard IoT gateway (translator), to an advanced edge computing gateway (local brain).

IoT Gateway vs. Edge Computing Gateway: Is It Just Marketing or a Real Upgrade?

IoT gateway vs edge gateway: is it just marketing? Learn the real difference: an IoT gateway sends data, an edge computing gateway processes it locally....

Robert Liao
Diagram comparing an IoT gateway vs router, showing the router passing IP packets while the IoT gateway translates protocols like Modbus to MQTT.

IoT Gateway vs. Router: What's the Real Difference You Need to Know?

IoT gateway vs router? See the critical differences in protocol conversion, edge computing, and security. A router just sends data; an IoT Gateway understands it....

Robert Liao
Diagram showing how an industrial IoT gateway acts as a bridge, translating protocols from OT devices like PLCs and CNCs into MQTT for IT cloud platforms.

The Ultimate IoT Gateway Guide: Definition, Features, Architecture & Selection

What is an IoT gateway? Our ultimate guide explains the definition, architecture, and key functions of an industrial IoT gateway, from protocol conversion to edge...

Robert Liao
Infographic explaining the fundamental trade-off in cellular spectrum used by lte vs 5g: lower frequencies offer longer range and penetration but lower speed, while higher frequencies offer higher speed but shorter range.

LTE vs 5G Spectrum Fundamentals: How Frequency Bands Impact Performance

Understanding lte vs 5g spectrum is key to performance. Learn how 5g frequency bands (low, mid, high/mmWave) affect cellular performance (speed, range). ...

Robert Liao
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