node-red-contrib-gpio 0.14.0

A set of node-red nodes for using johnny-five and IO plugins

npm install node-red-contrib-gpio

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A set of input and output nodes for controlling General Purpose Input and Outputs (GPIOs) though the use of johnny-five I/O Plugins as well as running johnny-five scripts!

Install via NPM

From inside your node-red directory:

npm install node-red-contrib-gpio

Control I/O for Analog, Digital, PWM and Servos

input output

Also Read and Write to i2c devices


Node configuration

  • 14 is the length of bytes to read (1 byte = 8 bits)
  • i2c bytes is an array of bytes. You can't use inject node directly because data has to be inside an array.
    return msg;
  • i2c read and i2c write configure i2c connection. I2c and register are decimal values! parseInt(x, 10) function is used to read values.

Now with full Johnny-five support!


Supported Hardware

node-red-contrib-gpio supports several johnny-five I/O classes:

Device IO Plugin
Arduino/Firmata firmata
Raspberry Pi raspi-io
BeagleBone Black, Green, Pocket beaglebone-io
C.H.I.P. chip-io
Galileo/Edison galileo-io
Blend Micro blend-micro-io
LightBlue Bean bean-io
ble-io(esp32, curie) ble-io
Circuit Playground(classic) playground-io
Electirc Imp imp-io
Particle(Spark) Core particle-io

Arduino is supported out of the box, but for other devices, you'll need to install their IO plugin.

For example to install the Raspberry Pi plugin:

npm install raspi-io

Remote Arduino Support

If you're using Arduino/Firmata, you can connect to a remote device via a raw tcp socket, or an MQTT connection.

For example, if you wanted to connect using tcp, in node-red you could specify an ip and port. On another machine with an Arduino plugged in you could run a server that relays a tcp socket to a serial port such as: tcpSerialRelay.js

If you wanted to connect an Arduino to an MQTT server you can use a script such as: bindSerialToMQTT.js. In node-red you can connect to the same MQTT server and subscribe to the topic the arduino is publishing on, while publishing to the topic that the arduino is subscribed to.

Node Info

Version: 0.14.0
Updated 2 years, 7 months ago
License: MIT
Rating: not yet rated


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  • gpio in
  • gpio out
  • node-led
  • nodebot
  • johnny5


  • gpio
  • io
  • firmata
  • node-red
  • johnny-five
  • mqtt
  • raspberry pi
  • arduino
  • galileo
  • edison
  • beaglebone
  • bluetooth
  • ble
  • ble-io