Using the 8ch Relay board from Waveshare. Going with a DIN rail mounted setup here.
Relay #3 can’t be used, it seems to be reserved. This board was made for a Raspberry, not a Banana, so I’m not too disappointed. It does fire up during the Linux boot process though.
Here is the program: relay.zip (4.1 KB). Copy it to the /bin folder.
To test all relays:
sudo relay test
To turn on/off individually:
sudo relay 1 on
sudo relay 1 off
To activate pulse mode:
sudo relay pulse
Here is the relay board. Raspberry Pi Expansion Board, 8-ch Relays