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SIMO.io Logo

Smart Home System

Open Source, Pro-Grade, Wire Based, DIY oriented.

SIMO.io app

Download and try!

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Download Android .apk

Open Source

State of the art smart home system built with latest
and greatest open source components.

Python Django
Redis NGINX
Ubuntu PostgreSQL OpenVPN Mosquitto Celery

Company Led

AI Powered

Community Backed

Ultimate smart home controller board for professional installations.
Built for flexibility, power, and long-term reliability — it becomes the backbone of your automation system, connecting everything and controlling it all from one place.

1 PoE LAN connector
2 Status LED
3 Power Switch
4 Controll Button
5 ESP32 based main control chip
6 6 x GPIO ports for digital signals
7 GND, 3V3, 5V, 12V, 48V outputs
8 2 x Digital Interface Ports
9 Extension cable
10 38 Universal IO ports for sensors and controlers

Binary Input

ON/OFF type (binary) sensors input module.

AC/DC Sensor

Delivers HIGH signal when 10V - 250V power is applied.

Relay

16A relay for turning On/Off devices up to 3.5 kW

AC Dimmer

Dimmer module for AC loads up to 350W

DC Dimmer

PWM Dimmer module for DC loads up to 350W, 75V

0 - 10V Controller

Controll LED drivers and ballasts that accept 0–10 V

I2C interface

Digital interface for i2c sensors and controlers

DALI interface

Full DALI line control and management

Network Architecture

Say what you want - AI builds it!

Describe behavior in plain language — SIMO.io compiles it into a beautiful Python code and runs it on your hub.

Arrive after sunset automation

Rain forecast automation

Warm bathroom automation
Runs Locally
Explainable Steps
Edit Anytime

Sentinel — One device. Every room.

Watches, protects and assists.




AI voice assistant

Your smart home butler, everywhere. Speak in any room to control the entire house, with room aware actions by default.

True 3D human presence

Zone‑based automations with ~10 cm precision for lighting, comfort, and security.

Dust/pollution detection + siren

Smart fusion reduces false alarms; 100 dB siren for instant, unmistakable alerts.

Humidity‑aware comfort

Temperature + humidity for “real‑feel” control that keeps rooms consistent across seasons.

VOC air quality

Clear AQI (1–5) in the SIMO.io app; automate fresh air with confidence.

Room Brightness Sensor

Predictable lighting scenes that feel right, day and night.

Sentinel device



Sentinel is the ceiling‑mounted room guardian of the SIMO.io smart home ecosystem. It gathers the data that matters, detects what others miss, carries out your requests by voice, and reports to the SIMO.io hub that already rules your home.

Mobile First - Superuser Backed

Install, configure and control using a mobile phone.
Power rule it using Web Admin or SSH console.

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Plug & Play Mobile First Power Web Tools SSH Access
Django Web Admin Developers Paradise
offer

The Test Kit

Meet SIMO.io with your hands,
not a brochure

The SIMO.io Test Kit is a bench‑in‑a‑box: our core modules, seriously discounted, so you can touch SIMO.io and decide with confidence. No YAML. No documentation marathons. Install the SIMO.io app, power the board, and watch real hardware respond.

What you’ll feel in under an hour

  • Real control: relays click, dimmers sweep, and the Sentinel reports—on your desk.
  • Plain‑language flow: describe intent in the SIMO.io app; the system does the heavy lifting. No scenes to build, no schedules to juggle, no YAML.
  • Clarity: the way SIMO.io behaves day‑to‑day—calm, predictable, professional.


SIMO.io Test Kit
4 x Binary Input Module
4 x Relay Module
2 x AC Dimmer
2 x DC Dimmer
1 x 0 - 10V Controller
1 x AC/DC Sensor

1 x Sentinel

1 x The Game Changer board



1 x The Game Changer: $189.00
4 x Binary Input Module: $19.96
4 x Relay Module: $39.96
2 x AC Dimmer: $25.98
2 x DC Dimmer: $25.98
1 x 0 - 10V Controller: $12.99
1 x AC/DC Sensor: $9.99
1 x Sentinel: $299.00
Shipping: $50.00
Total: $673
Offer discount (-48%): -$323.86
Final Price: $349

1 x The Game Changer board

$189.00

4 x Binary Input Module

$19.96

4 x Relay Module

$39.96

2 x AC Dimmer

$25.98

2 x DC Dimmer

$25.98

1 x 0 - 10V Controller

$12.99

1 x AC/DC Sensor

$9.99

1 x Sentinel

$299.00

Shipping

$50.00

Total: $673
Offer discount (-48%): -$323.86

Final Price: $349

30-day money-back guarantee

— return within 30 days for a full refund, no questions asked.

FAQ

Yes. SIMO.io is an open-source smart home platform built around a wired-first, pro-grade backbone (Ethernet/PoE + DIN-rail hardware) with a mobile-first setup flow. It’s designed to feel “installed” and reliable—while still giving power users full control (including Python scripting when you want it).

It’s a discounted “bench-in-a-box” bundle of our core hardware so you can touch SIMO.io in real life (not just read about it). You can test switching, dimming, sensors, and Sentinel behavior on your desk before committing to a full install.

The kit includes:
  • 1× The Game Changer board
  • 4× Binary Input Modules
  • 4× Relay Modules
  • 2× AC Dimmers
  • 2× DC Dimmers
  • 1× 0–10 V Controller
  • 1× AC/DC Sensor
  • 1× Sentinel

No. The Test Kit is the hardware bundle and does not include a hub. For evaluation you can start with a Virtual (cloud-hosted) SIMO.io instance in the app, or (if you’re technical) run SIMO.io locally on your own machine. When you’re ready for a serious / whole-home setup, add a SIMO.io Hub for full local authority and offline resilience.

A Virtual instance is a cloud-hosted SIMO.io smart home instance created inside the SIMO.io app. It’s the fastest way to evaluate the Test Kit without buying a hub. In the app, tap Add New → choose Virtual → then pair your Game Changer and start testing.

Not currently. Virtual instances are meant for evaluation and can’t be transferred to a local hub. If you later add a hub, you’ll set up a fresh local instance (it’s quick).

The preferred method is PoE over Ethernet for stability and simplicity. If PoE isn’t possible:
  • Game Changer can be powered by 12 V DC
  • Sentinel can be powered by PoE or 12–36 V DC
Both devices can connect over LAN or Wi-Fi (wired-first recommended, Wi-Fi supported).

Yes. You can run everything on Wi-Fi if needed (with the appropriate DC power supplies). For long-term installs we still recommend Ethernet/PoE wherever possible for best reliability.

It depends on how you run it:
  • Virtual (cloud) instance: internet is required for devices to communicate with it.
  • Local hub / local self-host: your core smart home runs on your LAN and keeps working even if the internet is down.
Some cloud features (like AI features) naturally require connectivity.

SIMO Cloud is an optional yearly plan that enables cloud-assisted features such as remote access, AI automation generation, Sentinel AI voice, in-app notifications, and location/presence updates.
  • Virtual Cloud Hub testing includes a 3-month free trial. After the trial, a yearly cloud subscription is required to continue using it that way.
  • If you run a local hub, SIMO Cloud is optional: the home keeps running locally either way.

Your smart home continues operating locally on your LAN (when you run a local hub). Cloud features pause until renewed—remote access, notifications, presence updates, and AI features (AI automations + Sentinel voice).

Yes. Both Virtual hub users and Local hub users can generate automations using the SIMO.io mobile app: you describe what you want in plain language, and SIMO generates the automation for you.
  • Virtual hub: you can generate AI automations in the mobile app, but you can’t directly edit the Python script.
  • Local hub: you can generate AI automations and edit the Python scripts via Django Web Admin (power-user mode).

Sentinel’s wake-word detection runs locally (“SIMI”). With a local hub, Sentinel’s core functions run on-premises; cloud is used only for AI voice understanding. You can also disable the voice assistant entirely in the SIMO.io app if you prefer silence.

Yes. SIMO.io hub software is open source under GNU GPL v3 (or later), and the official repositories are public. You can inspect the code, run it yourself, and extend it.

Both. SIMO.io is pro-grade in build and reliability, but the workflow is designed to be approachable: snap-in modules, guided onboarding in the app, and no YAML marathons. Beginners can stay in the app UI; advanced users can go deep with web admin / SSH.

You can do a lot safely with low-voltage demo loads. If you test AC dimmers or relays on mains voltage, follow local electrical code and use appropriate demo loads. If you’re not 100% confident, stay at SELV levels and/or involve a licensed electrician.

We include the correct AC dimmers for your region: 230 V or 110 V, matched to the order’s country.

We maintain an Integrations directory with both official and community options (for example Z-Wave, Sonos, Denon HEOS, and Komfovent). If you don’t see your device, you can request an integration and upvote it to help prioritize.

Start with the Quick Start Guide and the Wiki, then use the community forum for real-world builds, questions, and feature requests. If you hit an actual product issue, contact us and we’ll help you troubleshoot.

We ship from Lithuania (EU) via express couriers. Typical delivery is:
  • Europe: 3–5 business days
  • North America: 5–7 business days
  • Rest of world: 7–14 business days
(Estimates; customs can add time.) Import duties may apply outside the EU.

The Test Kit includes shipping and has a 30-day money-back guarantee—return it within 30 days of delivery for a full refund.

The Struggle That Forged

A real winter-night failure, told by founder & CEO.

In this video, SIMO.io CEO Simanas Venčkauskas explains how a “smart” home failure on a freezing winter night exposed everything wrong with consumer smart-home tech.

You’ll see the story behind SIMO.io: a house gone dark, a family left in the cold, and the decision to build a pro-grade, open, wired system designed for reliability and integrity—not gimmicks.

SIMO.io Quick Start Guide

Quick Start Guide

Learn how to set your wire‑first SIMO.io system up: place the hub, create an instance, pair Game Changer boards, and build your first automations.

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