relay8x

Library and utility command line tool to communicate with this relaise cards over serial and/or USB interface

Install the binary use cargo install relay8x and read relay8x --help for details on useage.

Features

• set specific or all relays on or off
• toggle specific or all relays on or off
• reset (=turn off) specific or all relays
• multiple cards on one serial device
• run custom command

Usage

Specify the device name in the environmental variable DEVICE:

• Linux/MacOs: export DEVICE=/dev/ttyX
• Windows: set DEVICE=COMX

Replace X with the actual port name. In addition there's an optional flag --dev=<dev> to override the env var. For commands and options use relay8x --help.

Documentation

details about communication protocol are in this pdf

Wiring / Setup

One card

• Jumper JP1 in position 1-2
• connect to USB

Cascading

• Jumper JP1 in position 2-3 for all cards but the last
• Jumper JP1 at last card in position 1-2
• connect GND terminals with following card
• connect Txb of preceeding card with Rxa of following card
• connect Rxb of preceeding card with Txa of following card

Windows

Driver works fine with Linux, during testing intermitted issues with stacked relaise cards appeared only on Windows.