8relay-rpi

This is the command line and python functions to control the 8-RELAYS Stackable Card for Raspberry Pi Ver. 3. If you have Ver. 1-2 with screw-type connectors download from here.

Don't forget to enable I2C communication:

~$ sudo raspi-config

A good article about I2C on Raspberry can be found here.

If you use Ubuntu you need to install bash raspi-config first:

~$ sudo apt update
~$ sudo apt install raspi-config

Usage

~$ git clone https://github.com/SequentMicrosystems/8relay-rpi.git
~$ cd 8relay-rpi/
~/8relay-rpi$ sudo make install

Now you can access all the functions of the relays board through the command "8relay". Use -h option for help:

~$ 8relay -h

If you clone the repository any update can be made with the following commands:

~$ cd 8relay-rpi/  
~/8relay-rpi$ git pull
~/8relay-rpi$ sudo make install

Python library

Node-Red example based on "exec" node

Node-Red "8relay" node

Arduino Library