Protolink
4G meter gateway that converts legacy meters into smart meters.
ProtoLink MG is purpose-built for utility and energy monitoring applications. It reads meter data over Modbus and securely transmits it to cloud/server systems over 4G networks.
MQTT(S)HTTP(S)Modbus

Why Teams Choose Protolink
Transforms conventional energy and utility meters into smart connected endpoints.
Designed for reliable field operation over cellular infrastructure.
Optimized for remote utility telemetry and centralized dashboards.
Interfaces and Connectivity
Modbus(RS485)AC Voltage Sensing (Digital Input)Digital Output:1 (On-board Relay)Power Supply: 5 VDC (Jack)LED Indication (Communication/Power/Fault)
Communication options: GSM 4G, Supports M2M SIM
High-Impact Use Cases
- Meter reading and cloud/server communication
- Meter reading through Modbus/RS485 port of meter
- Supports MQTT(S), HTTP(S) protocol
- Supports Multiple Meters in Daisy Chain Connection
Industrial Applications
Energy Monitoring Solution
Utility monitoring such as flow and level systems
Product Gallery
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