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ellenex DUS3-N / DUS2-N / NDDS20 family Category: ellenex — NB-IoT Sensors Network: NB-IoT + LTE-M Protocols MNO Certifications Notes ✔ DIRECT One-IoT DM — LwM2M native (v1.1, CoAP/UDP, DTLS). FOTA + config + telemetry. | IP68 ultrasonic distance/level sensors. Native LwM2M + MQTT. CoAP/UDP + NIDD. One-IoT DM direct registration.

Acrios Systems M-Bus to IoT / RS-485 to IoT / Pulse to IoT / wM-Bus to IoT Converter Category: PROTOCOL CONVERTERS & INDUSTRIAL BRIDGES — M-Bus / RS-485 / Modbus to NB-IoT/LTE-M Network: NB-IoT / LTE-M Protocols MNO Certifications Notes ⚠ Lua scripting engine on-device enables custom MQTT/CoAP protocol mapping. One-IoT DM: MQTT path via Lua

Elvaco CMi6110 / CMi6160 / CMi6140 Category: PROTOCOL CONVERTERS & INDUSTRIAL BRIDGES — M-Bus / RS-485 / Modbus to NB-IoT/LTE-M Network: NB-IoT Protocols MNO Certifications Notes Plug-in modules for Landis+Gyr UH50/UC50, Diehl SHARKY, Kamstrup Multical. M-Bus reading → MQTT/HTTP uplink. One-IoT DM: MQTT path. Contact Elvaco for TLS/LwM2M confirmation.

Grandcentrix Modbus Cloud Connect Gateway Category: PROTOCOL CONVERTERS & INDUSTRIAL BRIDGES — M-Bus / RS-485 / Modbus to NB-IoT/LTE-M Network: NB-IoT / LTE-M Protocols MNO Certifications Notes Connect Modbus devices to cloud. MQTT to One-IoT DM.

IOT Factory MODBUS/RS485 Converter / 4-20mA Converter / Sensor Hub Category: PROTOCOL CONVERTERS & INDUSTRIAL BRIDGES — M-Bus / RS-485 / Modbus to NB-IoT/LTE-M Network: NB-IoT / LTE-M Protocols MNO Certifications Notes RS232/RS485 Modbus bridge, 4-20mA transmitter, 1-Wire/Pulse/Modbus sensor hub. MQTT + CoAP to One-IoT DM.

HARDWARIO Chester Gateway Category: PROTOCOL CONVERTERS & INDUSTRIAL BRIDGES — M-Bus / RS-485 / Modbus to NB-IoT/LTE-M Network: NB-IoT / LTE-M Protocols MNO Certifications Notes Industry 4.0, smart city, energy monitoring. MQTT to One-IoT DM.

Advantech WISE-4471 Category: PROTOCOL CONVERTERS & INDUSTRIAL BRIDGES — M-Bus / RS-485 / Modbus to NB-IoT/LTE-M Network: NB-IoT (via cellular module) Protocols MNO Certifications Notes ⚠ All protocols via optional apps. Analog/digital I/O acquisition. TR-069 native. MQTT + LwM2M require app installation. One-IoT DM: MQTT app path.