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Control your home
Trigger lights, gates, blinds, scenes and selected building functions directly from your wrist.
TechRexOS Watch
Smart Home control.
Right on your wrist.
TechRexOS Watch is an ESP32-S3R8 smartwatch with a 2.06-inch AMOLED display, built for fast, local Smart Home control through MQTT. It is designed for integration with Home Assistant, Domoticz, openHAB, BMS and custom home automation — without making cloud services the foundation of your home.
Local-firstCore control without cloud dependency
MQTT controlOne lightweight link to your automation
Smart Home smartwatchfast control for daily home automation
MQTT-firstcommands, states and events over MQTT
Local-firstdesigned for local network operation
Multiple ecosystemsHome Assistant, Domoticz, openHAB and BMS
TechRexOS Studioweb-based watch configuration
Built for everyday control
Less phone. More direct control.
A smartwatch should not be a tiny copy of a desktop dashboard. TechRexOS focuses on quick actions: lights, blinds, gates, scenes, status and notifications — the things you want to reach in seconds.
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See the current state
Use the same interface element to understand device status and act on it without digging through menus.
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Quick actions and gestures
Tap, swipe and long press are used for the actions that should feel immediate on a smartwatch.
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MQTT Smart Home control
TechRexOS uses MQTT as the common communication layer between the watch and home automation environments.
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Cloud optional
The product is designed around local control first. Online services may extend the system, but they do not have to be its foundation.
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AMOLED-first interface
A dark, high-contrast wearable interface designed for quick reading and touch interaction on a small display.
MQTT integrations
One watch. Different automation ecosystems.
TechRexOS is designed to communicate with automation through MQTT instead of locking the watch UI to one platform. That makes it suitable for different Smart Home and building automation environments.
Home AssistantDomoticzopenHAB
MQTTBMS / building automationCustom local automation
TechRexOS is in active development. Integration wording on this site describes the intended MQTT-based product architecture and supported integration direction; individual integrations may be at different implementation stages.
Local-first Smart Home
Your home should not depend on the Internet for every tap.
TechRexOS is being designed for local home automation, where MQTT traffic can stay inside your LAN and core control can remain available without an external cloud round trip.
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Local network communicationUseful for responsive controls and cloud-independent home automation.
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Works with your automation layerHome Assistant, Domoticz, openHAB, BMS or a custom MQTT environment.
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Cloud can be an extensionOnline services can add value without being the only way to control the home.
Why MQTT
A simple connection between the watch and the home.
MQTT gives TechRexOS a common language for commands, states and events. For the user, that means the watch can present one consistent Smart Home experience even when the automation behind it changes.
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Watch actionYou tap a light, blind, gate or scene.
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MQTT communicationThe command and device state are exchanged with the local automation environment.
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Clear feedbackThe watch shows the state instead of behaving like a blind remote control.
Hardware
Built on a serious wearable platform.
TechRexOS Watch runs on an ESP32-S3R8 platform with a 2.06-inch AMOLED display, capacitive touch, Wi-Fi, Bluetooth LE, motion sensing, audio hardware, RTC and microSD support. The hardware gives TechRexOS enough room for a rich wearable interface and local Smart Home features.
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2.06″ AMOLED
410 × 502 px, 16.7 million colors, wide viewing angle and high contrast for a crisp wearable UI.
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ESP32-S3R8
Dual-core Xtensa LX7 at up to 240 MHz, 8 MB PSRAM and 32 MB Flash for the TechRexOS firmware and interface.
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Wi-Fi + Bluetooth 5 LE
Wireless connectivity for local Smart Home communication, configuration and future wearable features.
TechRexOS Studio · Web configuration
Configure the watch from a browser.
TechRexOS Studio is the planned web-based environment for configuring the watch: devices, screens, tiles, functions, MQTT integrations and settings — without editing firmware code for everyday configuration.
studio.techrexos.com / watch
WATCHTechRexOS Watch
MQTTConnected
HOME SCREENSmart Home
DEVICESAssigned entities
INTEGRATIONSAutomation profiles
FIRMWAREUpdate management
Explore the use cases
Looking for a smartwatch for your automation system?
These focused pages answer the questions people ask when searching for a Home Assistant smartwatch, MQTT smartwatch, ESP32 smartwatch or cloud-independent Smart Home control.
Home Assistant
Smartwatch for Home Assistant
How TechRexOS approaches Home Assistant control through MQTT and a wearable-first interface.
Read guide → MQTTMQTT smartwatch for home automation
Why MQTT is a useful link between a smartwatch and a local Smart Home environment.
Read guide → ESP32-S3R8ESP32 smartwatch platform
A product-focused look at TechRexOS Watch as an ESP32-S3R8 wearable platform.
Read guide → Local-firstSmart Home without cloud dependency
Why local home automation matters for responsiveness, resilience and user control.
Read guide → DomoticzDomoticz smartwatch control
TechRexOS as a wearable interface for MQTT-connected Domoticz environments.
Read guide → openHABopenHAB smartwatch control
A local-first smartwatch concept for openHAB environments that use MQTT.
Read guide → BMSWearable control for building automation
Why a smartwatch can be useful as a fast BMS and smart-building control surface.
Read guide → ConfigurationTechRexOS Studio
The web-based configuration environment planned for TechRexOS Watch.
Read guide →FAQ
Common questions about a Smart Home smartwatch.
Short answers for people comparing Home Assistant watches, MQTT wearables, ESP32 smartwatches and local home automation options.
Can a smartwatch control Home Assistant?
Yes. TechRexOS is designed for MQTT-based integration with Home Assistant so common home actions can be exposed through a wearable-first interface.
Is TechRexOS a Wear OS watch?
No. TechRexOS is its own ESP32-S3R8 based smartwatch platform. It targets Smart Home control without requiring Wear OS.
Can TechRexOS control MQTT devices?
MQTT is the core communication direction for exchanging Smart Home commands, device states and events with the watch.
Can it work without cloud services?
The product follows a local-first design: core home automation can be built around the local network, while online services remain optional extensions.
What is TechRexOS Studio?
TechRexOS Studio is the planned browser-based configuration environment for watch screens, devices, functions and MQTT integrations.
Which Smart Home systems are targeted?
TechRexOS is designed around MQTT-based integration with environments such as Home Assistant, Domoticz, openHAB, BMS and custom local automation.
TechRexOS Watch
Put the controls you use every day where they are easiest to reach.
A local-first, MQTT-connected Smart Home smartwatch designed around fast actions instead of another miniature phone interface.