Flow Ctrl Tech Engineering

Modbus-to-MQTT Gateway Integration

Modernize legacy RS485 energy meters, drives, and field instruments into cloud-connected IoT devices.

  • Field instruments (energy meters, VFDs, solar inverters) operate as Modbus slaves on 2-wire RS485 daisy chains
  • Industrial Gateway acts as Modbus Master, polling holding and input registers cyclically
  • Internal gateway translation engine parses 16-bit registers and handles word-swaps for 32-bit floats and integers
  • Data is mapped to human-readable JSON keys (e.g., {"voltage": 230.5, "current": 14.2, "kwh": 48201.8})

Flow Ctrl Tech Engineering: Turnkey industrial automation, PLC programming, SCADA development, HMI, fieldbuses, and IIoT architectures. Contact our engineering center at [email protected] or phone +91 91110 91005.