Installing & Testing USB Relay on Linux Ubuntu

Prerequisites

Before testing the USB relay, ensure you have the following installed:

• Ubuntu operating system
• Required packages:
  • git
  • python3
  • libhidapi-dev
  • libhidapi-hidraw0
  • python3-pip

Installation Steps

1. Install Required Packages
   Open a terminal and run the following commands:

bash

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sudo apt-get update

sudo apt-get install git python3 libhidapi-dev libhidapi-hidraw0 python3-pip

2. Clone the USB Relay Repository
   Download the USB relay code from GitHub:

bash

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git clone https://github.com/darrylb123/usbrelay.git

cd usbrelay

3. Build the Code
   Compile the code using the following commands:

bash

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make

sudo make install

Testing the USB Relay

1. Connect the USB Relay
   Plug the USB relay device into your computer.
2. Run the USB Relay Command
   To check if the relay is recognized, execute:

bash

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sudo usbrelay

This command will display the connected relay devices and their states.

3. Control the Relay
   You can control the relay using commands like:

bash

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sudo usbrelay RELID_1=1  # Turn on relay 1

sudo usbrelay RELID_1=0  # Turn off relay 1

Additional Notes

• If you encounter permission issues, consider adding your user to the plugdev group:

bash

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sudo usermod -a -G plugdev <your_username>

• For debugging, you can use the -d option:

bash

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sudo usbrelay -d