Cueva Control RELO IO8

The Cueva Control RELO IO8 is an Ethernet I/O module built for professional automation and control. It features 8 relay outputs, 8 digital inputs, a built-in automation engine, and full cloud connectivity — designed to work standalone or as part of a larger system.

Learn more and find the full product documentation at cuevacontrol.com.

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What the RELO IO8 supports

I/O

• 8 relay outputs — on, off, toggle, or pulse with configurable duration
• 8 digital inputs — monitored in real time with configurable labels

Connectivity

• Local control over Ethernet (100 Mbps)
• Remote cloud control via Cueva Horizon
• HTTP REST API, WebSocket, TCP, OSC, and UDP
• Firmware updates over the air

Automation

• Node-based visual automation engine
• Relay presets — save and recall multi-relay states instantly
• Real-time clock (RTC) for time-based triggers
• Multi-device support — pair multiple RELO IO8 units together

Management

• Desktop app for full configuration and monitoring
• RGB status LED with effects (Solid, Blink, Breathing, Rainbow, Chase)
• Device discovery over the local network

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Companion Connection Setup

1. Set the Host to the IP address of the RELO IO8.
2. Paste the Auth Token from the device settings under Settings - Integrations.

The module connects automatically and reconnects if the connection drops.

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Actions

Action	Description
Set Relay	Turn a relay on, off, toggle it, or pulse it for a configurable duration
Execute Node	Trigger a node selected from the live node list
Apply Preset	Apply a saved relay preset selected from the live preset list
Set Relay Label	Rename a relay on the device
Set LED Color	Set the status LED color
Set LED Brightness	Set the status LED brightness (0-255)
Set LED Effect	Set the status LED effect (Solid, Blink, Breathing, Rainbow, Chase)
Set LED On/Off	Turn the status LED on, off, or toggle it
Refresh Device State	Re-fetch all nodes, presets, relay and input states from the device

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Feedbacks

Feedback	Description
Relay State	Button style changes when the selected relay is on or off
Input State	Button style changes when the selected input is active or inactive
Device Connected	Button style changes when the device is connected
LED Enabled	Button style changes when the status LED is on

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Using Variables on Buttons

Variables update live from the device. The default connection label is RELO-IO8. Use the $ button next to the text field to pick variables from a list.

Relays

Variable	Description
$(RELO-IO8:relay_N_state)	true / false for relay N (1-8)
$(RELO-IO8:relay_N_label)	Label for relay N
$(RELO-IO8:relays_on)	Number of relays currently ON

Inputs

Variable	Description
$(RELO-IO8:input_N_state)	true / false for input N (1-8)
$(RELO-IO8:input_N_label)	Label for input N

Status LED

Variable	Description
$(RELO-IO8:led_enabled)	true / false
$(RELO-IO8:led_color)	Color as hex (#RRGGBB)
$(RELO-IO8:led_brightness)	Brightness 0-255
$(RELO-IO8:led_effect)	Effect number (0=Solid 1=Blink 2=Breathing 3=Rainbow 4=Chase)

Connection and device

Variable	Description
$(RELO-IO8:connected)	true when connected
$(RELO-IO8:device_name)	Device name
$(RELO-IO8:ip)	Device IP address
$(RELO-IO8:uptime_formatted)	Uptime (e.g. 2h 34m 12s)

Diagnostic

Variable	Description
$(RELO-IO8:mac)	Device MAC address
$(RELO-IO8:firmware_version)	Firmware version
$(RELO-IO8:device_id)	Unique device ID
$(RELO-IO8:uptime)	Uptime in seconds
$(RELO-IO8:node_count)	Number of nodes on the device
$(RELO-IO8:preset_count)	Number of presets on the device

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Notes

• Relay and input states update automatically whenever they change on the device.
• Node and preset lists update live. Use Refresh Device State if a dropdown still shows stale data after making changes on the device.
• For more information about the RELO IO8 visit cuevacontrol.com.