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Diagram showing how a Robustel R1520 uses industrial interfaces to monitor a smart vending machine and send a remote alert.

Detailed explanation of IOT industrial interfaces: serial interface, digital input/output (DI/DO), and analog input/output

Author: Mark, Technical Support Engineer Mark is an IoT Technical Support Engineer at Robustel with hands-on experience in industrial networking and edge connectivity. Certified as...

Mark
A split image showing the contrast between inefficient manual meter reading and modern remote monitoring using a Modbus gateway.

Modbus Gateway: Connect Legacy RS485 Meters to the Cloud

Author: Mark, Technical Support Engineer Mark is an IoT Technical Support Engineer at Robustel with hands-on experience in industrial networking and edge connectivity. Certified as...

Mark
A diagram illustrating the data island problem where an isolated RS485 serial bus cannot connect to a central SCADA system or the cloud.

RS485 to Ethernet: Bridge Your Serial Devices to SCADA

Author: Mark, Technical Support Engineer Mark is an IoT Technical Support Engineer at Robustel with hands-on experience in industrial networking and edge connectivity. Certified as...

Mark
A realistic CAD-style rendering of the bottom interface panel of a black Robustel industrial gateway. The image shows five Gigabit Ethernet ports (ETH0-ETH4), a USB port, terminal blocks for DIDO, AI, and Serial communication (RS232/RS485), a power input

DIY a DI SMS Alarm for Instant Machine Downtime Alerts

Author: Mark, Technical Support Engineer Mark is an IoT Technical Support Engineer at Robustel with hands-on experience in industrial networking and edge connectivity. Certified as...

Mark
An infographic comparing the old method of driving to a remote site versus using remote DO control from a computer.

Master Remote DO Control with the R1520 Industrial Router

Author: Mark, Technical Support Engineer Mark is an IoT Technical Support Engineer at Robustel with hands-on experience in industrial networking and edge connectivity. Certified as...

Mark
A diagram showing the ROI of a 5G edge router by preventing costly AGV downtime caused by Wi-Fi or 4G LTE latency.

Building the Business Case for a 5G Edge Router (TCO vs. ROI)

Building a business case for 5G? This guide compares the 5g edge router TCO vs. ROI, showing how low latency and high speed justify the...

Robert Liao
An architecture diagram showing how a secure edge router provides ot security by using a firewall and network segmentation to stop ransomware.

How a Secure Edge Router Stops Ransomware from Reaching Your OT Network

How does a secure edge router stop ransomware from reaching your OT network? Learn how this edge router uses segmentation and a firewall to protect...

Robert Liao
A graphic showing that a Cisco router can be over-engineered, while a Robustel edge router is the right-sized tool for industrial edge connectivity.

Looking for a Cisco Edge Router Alternative? A Robustel Comparison

Need a Cisco edge router alternative? See how a Robustel industrial edge router compares on TCO, simplicity (RCMS), and cellular connectivity. ...

Robert Liao
An infographic showing the key features of a SASE-ready cellular edge router, such as a Robustel device with 5G, RCMS, and IEC 62443 security.

What Is a SASE Edge Router and How Does It Secure Your Network?

What is SASE? Learn how a SASE edge router merges cloud security & networking, moving beyond VPNs for a 'zero trust' architecture. ...

Robert Liao
A diagram comparing an edge router, which handles Layer 3 IP packets, to an IoT Gateway, which translates Layer 7 application data like Modbus.

Edge Router vs. IoT Gateway: Are They the Same Thing?

Edge router vs IoT gateway: Are they the same? Learn the key difference. An edge router connects networks (L3); an IoT gateway translates protocols (L7)....

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
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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