agutenkunst/controlling_usb_relay_using_ubuntu.md

## controlling_usb_relay_using_ubuntu.md

      
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    Controlling an USB-Relay using Ubuntu

Hardware

https://www.amazon.de/ARCELI-SRD-05VDC-SL-C-Relais-Modul-Kostenloser-Intelligent/dp/B07JL4YB8R
Software


Tested with Ubuntu 20

Requirements

sudo apt install usbrelay

Usage

Read the state

sudo usbrelay

which will output something like
Device Found
  type: 16c0 05df
  path: /dev/hidraw0
  serial_number: 
  Manufacturer: www.dcttech.com
  Product:      USBRelay2
  Release:      100
  Interface:    0
  Number of Relays = 2
1_1=0
1_2=0

Set the state

Use the information obtained by getting the state to set the variables (in this case 1_1 and 1_2, I saw these be different initially, not sure why)
To enable relay 1 do
sudo usbrelay 1_1=1

Further information and more detailed usage

https://github.com/darrylb123/usbrelay