node-red-contrib-usbhid 0.0.1

A node-hid (USB HID device access library) wrapper for nodered

npm install node-red-contrib-usbhid

A node-hid (USB HID device access library) wrapper for nodered

Credit goes to node-hid.

You can look up either git to find information on setup, Prerequisites and Platforms to get the node working: https://github.com/node-hid/node-hid

Prerequisites:

  • Node.js v0.8 - v4.x+
  • Mac OS X 10.8, Linux (kernel 2.6+), and Windows XP+
  • libudev-dev, libusb-1.0-0-dev (if Linux, see Compile below)
  • git

node-hid uses node-pre-gyp to store pre-built binary bundles, so usually no compiler is needed to install.

Platforms we pre-build binaries for:

  • Mac OS X x64: v0.10, v0.12, v4.2.x
  • Windows x64 & x86: v0.10, v0.12, v4.2.x
  • Linux Debian/Ubuntu x64: v4.2.x
  • Raspberry Pi arm: v4.2.x

How to Use

HID ( USB ) read/write access for non root users ( in my case for user pi on an raspberry pi 2 running nodered )

The Pd-extended [hid] object allows you to access Human Interface Devices such as mice, keyboards, and joysticks. However, in most Linux distributions, these devices are setup to where they cannot be read/written directly by Pd unless you run it as root.

Running a non-system process as root is considered a security risk, so an alternative is to change the permissions of the input devices so that pd can read/write them.

sudo mkdir -p /etc/udev/rules.d
sudo nano /etc/udev/rules.d/85-pure-data.rules

Now add the following rules to /etc/udev/rules.d/85-pure-data.rules:

SUBSYSTEM=="usb", GROUP="input", MODE="777"

Then create an "input" group and add yourself to it:

sudo groupadd -f input
sudo gpasswd -a YOURUSERNAME input

Reboot your machine for the rules to take effect. Your nodejs / nodered has now FULL ACCESS !! to you usb devides. Feel free to adjust the permissions to fit your needs.

Node Info

Version: 0.0.1
Updated 8 months ago
License: Apache-2.0

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Nodes

  • HIDConfig
  • getHIDdevices
  • HIDdevice

Keywords

  • node-red
  • usbhid
  • usb-hid
  • hid
  • usb

Maintainers

  • somebuddy87