node-red-contrib-modbus 1.0.0

The all in one Modbus TCP and Serial contribution package for Node-RED.

npm install node-red-contrib-modbus

Node-RED Modbus Standard - JavaScript Style Guide NPM download NPM version Build Status Gratipay



Node-RED contribution package for Modbus

Based on modbus-serial with TCP and Serial RTU, RTU buffered, C701, Telnet, ASCII

  • stress tested with Node-RED v0.15.2/v0.16.1 and Node.js (4.7/6.9 LTS)
  • works with queueing per unit and round robin scheduling


Run the following command in the root directory of your Node-RED install

npm install node-red-contrib-modbus

Run the following command for global install

npm install -g node-red-contrib-modbus

try these options on npm install to build, if you have problems to install

--unsafe-perm --build-from-source

How to use

use the Flow example to see how it works ...

see YouTube Playlist

Flow Example


since April 2016 by Klaus Landsdorf

History started in early 2015 by Mika Karaila license changed in 2016 by Jason D. Harper contribution in 2016 by iurly

Node Info

Version: 1.0.0
Updated 1 day ago
License: BSD-3-Clause


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  • node-red
  • modbus
  • Modbus
  • tcp
  • serial
  • server
  • client
  • slave
  • master
  • rtu
  • ascii
  • C701
  • telnet
  • rtu buffered
  • flexible read
  • flexible write
  • contrib
  • modbus serial
  • modbus tcp
  • modbus slave
  • modbus master
  • modbus-serial
  • node-modbus


  • aborovsky
  • biancode
  • mikakaraila
  • ykornilov