What it does
Bring existing Modbus equipment online without replacing it. The gateway polls your field devices on a schedule you choose, converts the raw registers into engineering units, and publishes them to your MQTT broker.
Typical sites: solar plants · water pumping stations · factory lines · remote assets · Modbus meters inside a building.
Field side
| Protocol | Wiring | Devices |
|---|---|---|
| Modbus RTU | RS-485 | up to 32 |
| Modbus TCP | Ethernet | up to 6 concurrent |
Thirty-two devices in total across both, and up to 256 tags for the whole gateway.
Cloud side
Publishes MQTT 3.1.1 to your broker — your topics, your credentials, TLS if you need it. Nothing is locked to a particular cloud vendor.
When the link drops, readings are buffered on onboard flash and forwarded in order once the network returns. Every reading carries the timestamp it was captured, not the time it was finally sent — so data arriving late after an outage still carries its true age.
Read-only by design
The gateway supports the four Modbus read function codes and nothing else. It issues no writes, and accepts no command from the cloud that could change a field device. For a monitoring system sitting on a live process, that is a hard boundary rather than a setting.
Configuration
A desktop application over USB-C. No embedded web interface, and no cloud account needed to commission a unit.