Modbus Poll

Modbus Poll is a Modbus client app for polling, reading, and writing registers to Modbus devices right from your Android phone.

KEY FEATURES

• Modbus TCP client — read (FC01-04) and write (FC05, FC06, FC15, FC16) registers on devices on your local network

• Modbus RTU client (Android) — connect to RTU slaves via a USB-to-serial (USB-OTG) adapter

• Automatic polling with real-time TX/RX/ERR counters

• Register table with aliases, conversion formulas (e.g. x/10), and 24 display modes (16/32/64-bit, multiple byte orders)

• Per-register sparkline charts to track value trends

• CSV logging, shared directly via the Android share sheet

• Modbus TCP network scan (subnet & port scan)

• RTU slave scan (slave ID and baud rate)

WHO IT'S FOR

Technicians, engineers, and anyone who needs to diagnose, configure, or monitor Modbus devices (PLCs, sensors, meters, etc.) in the field without carrying a laptop.

Note: RTU mode via USB-OTG is Android-only and requires a USB-to-serial adapter (e.g. CH340, FTDI, CP2102).