node-modbus-cli

A Modbus client writen in JavaScript

Introduction

Utility script for accessing Modbus devices. Many hobby devices and PLC controllers speak Modbus.

Installation

To install, run npm install if you install from source code, or npm install modbus-cli.

Usage

The -h flag will print out a help text, that list the command line arguments.

modbus-cli -h

Usage: modbus-cli <command> [options]

Commands:
  read   Read holding registers
  readi  Read input registers
  force  force single coil

Options:
  --config    Path to JSON config file
  -h, --help  Show help                                                [boolean]

Examples:
  modbus-cli read -u 192.168.1.11 -a 5

Querying Holding Registers

Read Holding registers.

modbus-cli read -u 192.168.1.11 -a 5
modbus-cli read -u /dev/ttyUSB0 -a 0 -l 4

Querying Input Registers

Read Holding registers.

modbus-cli readi -u 192.168.1.11 -a 5
modbus-cli readi -u /dev/ttyUSB0 -a 0 -l 4

Force one Coil

Force one Coil.

modbus-cli force -u 192.168.1.11 -a 5 -v 0
modbus-cli force -u /dev/ttyUSB0 -a 0 -v 1