mvines/sainsmart-relay16

This module controls a SainSmart 16-channel USB-HID programmable relay using node.

Usage

$ npm install
$ ./sainsmart-relay16
Available commands:
  on <N>  - Turn relay N on
  off <N> - Turn relay N off
  test    - Run a test pattern to ensure all relays are functioning
  reset   - Reset the device state, turn off all the relays

../hidapi/libusb/hid.c:47: fatal error: libusb.h: No such file or directory

If you run into a missing libusb.h during npm install on Ubuntu, try:

sudo apt-get install libusb-1.0-0-dev

Segmentation fault (core dumped)

Currently node-hid will segmentation fault if the current user does not have access to the HID device. You may use sudo or follow the instructions to add udev rules.

$ ./sainsmart-relay16 test
Detected devices: [ { vendorId: 1046,
    productId: 20512,
    path: '0007:0009:00',
    release: 0,
    interface: 0 } ]
Segmentation fault (core dumped)

$ sudo ./sainsmart-relay16 test
Detected devices: [ { vendorId: 1046,
    productId: 20512,
    path: '0007:0009:00',
    manufacturer: 'Nuvoton',
    product: 'HID Transfer',
    release: 0,
    interface: 0 } ]

udev rules

You can use this module without sudo by following the steps below:

Copy the udev rules file to /etc/udev/rules.d.

sudo cp 51-sainsmart-usb.rules /etc/udev/rules.d/

Disconnect and reconnect the device from USB.
Run the command without sudo!

$  sainsmart-relay16 test
Detected devices: [ { vendorId: 1046,
    productId: 20512,
    path: '0001:0008:00',
    manufacturer: 'Nuvoton',
    product: 'HID Transfer',
    release: 0,
    interface: 0 } ]

Required Hardware

Search Amazon for "SainSmart 16-CH USB HID Programmable Control Relay Module + Relay". The unit looks like this:

You will also need a 12V power supply (~1A) connected to the blue connector on the main relay board. Do not connect anything to the green connector on the USB HID board.