Modbus Poll Mobile

Modbus TCP master & monitor for engineers on the go. Poll registers, decode data, log to CSV, and diagnose devices in the field — right from your phone.

Modbus Poll is a mobile Modbus TCP master and diagnostic tool for engineers, technicians, and integrators who need to check on PLCs, sensors, and industrial devices without carrying a laptop.

CONNECT & POLL • Modbus TCP client — connect to any device on your network by IP and port • Read Coils, Discrete Inputs, Holding Registers, and Input Registers (FC01–FC04) • Write single or multiple coils and registers (FC05, FC06, FC15, FC16) • Configurable slave ID, start address, quantity, and poll interval • Live TX/RX/error counters so you can see connection health at a glance

MAKE SENSE OF THE DATA • 24 display formats: signed/unsigned, hex, binary, 32-bit long, float, and 64-bit integer/double — in all four standard byte orders • Per-register aliases so "400012" becomes "Tank Level" • Custom scaling formulas (e.g. x/10) to convert raw register values into real-world units • Live sparkline charts per register, with min/max and history

FIND DEVICES FASTER • Network scan across a subnet to discover responding Modbus TCP devices • LAN port scan for general network diagnostics

LOG & SHARE • Log live polling data straight to CSV • Share the log file instantly via the system share sheet — AirDrop, email, cloud storage, wherever you need it

BUILT FOR THE FIELD • Clean, fast interface with light and dark themes • Works over Wi-Fi or cellular — anywhere your device reaches the target network

Whether you're commissioning a new panel, chasing down a communication fault, or just need to peek at a register value between meetings, Modbus Poll puts a full Modbus master in your pocket.