Does it need a Shelly hub to work?

No, the ST802 has built-in WiFi 802.11 b/g/n and Bluetooth LE and connects directly to the network; it is a Powered by Shelly device shown in the Shelly Smart Control app.

What is the maximum load of the built-in relay?

The dry-contact relay is rated 2 A resistive; for boilers or pumps with a higher load use a contactor or an additional Shelly relay.

Can it be integrated into a centralized building automation system?

Yes, the ST802 has an RS485 MODBUS RTU interface that allows connection to centralized building management panels and systems.

How is the thermostat installed?

It is flush-mounted in a standard 60 mm box and powered from 110-240 V AC; we recommend installation by an electrician because it involves 230 V and HVAC connections.

LinkedGo ST802 HVAC Thermostat Shelly

Name: LinkedGo ST802 Smart HVAC Thermostat Powered by Shelly (WiFi, Bluetooth)
Brand: Powered by Shelly
SKU: LINKEDGO-HVAC-THERMOSTAT

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Termostat HVAC inteligent LinkedGo ST802 Powered by Shelly (WiFi, Bluetooth) - main

Compatibility

Works with these ecosystems

Protocols

Wi-Fi
BLE

Ecosystems

Home Assistant
Apple Home
Google Home
Amazon Alexa
Samsung SmartThings

What it is, who it's for, what it does

About this product

The LinkedGo ST802 is a Powered by Shelly HVAC thermostat that controls an entire climate system from one device flush-mounted in a 60 mm box. It drives fan coil units, underfloor heating, ventilation and cooling on chilled or warm water.<br><br>It offers a 2 A dry-contact relay for valves or a boiler, three 0-10 V analog outputs for AC or DC fans, and one input for an external sensor. WiFi 802.11 b/g/n and Bluetooth LE give direct hub- control, while the RS485 MODBUS RTU interface ties it into centralized building systems.<br><br>A built-in temperature and humidity sensor, an frost-protection function and adjustable offsets keep control accurate. Operation is available from the Shelly Smart Control app, Alexa, Google Home, Home Assistant and SmartThings.

Delivery
Free from 1500 MDL
Returns
30 days to return
Warranty
24 months

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CasaSmart essentials

What it works with, what it needs, what you can do

Verified compatibility

We test every device for these ecosystems. For non-standard integrations contact us before ordering.

Home Assistant
Zigbee
Matter
KNX
Wi-Fi

Install & requirements

What you need on your side and what we deliver.

Zigbee hub or Matter gateway for wireless variants
65 mm back-box or DIN panel for wired variants
Local setup on Home Assistant — included in install

Request install quote

Smart scenarios

Three typical automations we set up after the install.

01Morning: warm light + blinds up + climate at 22 °C
02Leaving: lights off, arm sensors, close the gas
03Evening: warm ambient + cinema scene

Where it works

Use cases

In a Chisinau apartment summer cooling and winter heating are run by the same thermostat.

Fan coil fan speed is driven by the 0-10 V outputs and the valve by the relay.

The bathroom floor is held at a steady temperature each morning.

The 2 A relay drives the zone valve while the external sensor reads screed temperature.

In an office several ST802 thermostats are monitored from one centralized panel.

The RS485 MODBUS RTU interface links the thermostat to a central automation system.

For the installer

Technical specifications

full spec · wiring · datasheet

Power

Alimentare: 110-240 V AC
Frecventa retea: 50/60 Hz
Releu iesire: 1x contact uscat 2 A rezistiv
Iesiri analogice: 3x 0-10 V

Wireless

WiFi: 802.11 b/g/n 2.4 GHz
Bluetooth: LE 4.2

Connectivity

Interfata cu fir: RS485 MODBUS RTU
Intrare senzor extern: 1

Physical

Dimensiuni: 87 x 87 x 39 mm
Montaj: incastrat in doza 60 mm
Carcasa: ABS negru, afisaj LCD cu butoane tactile

Environment

Interval reglare: 15-35 C
Precizie temperatura: +/-0.5 C
Precizie umiditate: +/-5 %
Temperatura functionare: -10 ... 55 C
Umiditate functionare: 5-95 % RH

Full device datasheet

Support

Frequently asked questions

Which HVAC systems can the LinkedGo ST802 thermostat control?
The ST802 controls fan coil units, underfloor heating, ventilation and cooling on chilled or warm water via its 2 A relay and three 0-10 V outputs.
Does it need a Shelly hub to work?
No, the ST802 has built-in WiFi 802.11 b/g/n and Bluetooth LE and connects directly to the network; it is a Powered by Shelly device shown in the Shelly Smart Control app.
What is the maximum load of the built-in relay?
The dry-contact relay is rated 2 A resistive; for boilers or pumps with a higher load use a contactor or an additional Shelly relay.
Which smart home ecosystems is it compatible with?
The thermostat works with the Shelly Smart Control app, Alexa, Google Home, Home Assistant and SmartThings.
Can it be integrated into a centralized building automation system?
Yes, the ST802 has an RS485 MODBUS RTU interface that allows connection to centralized building management panels and systems.
How is the thermostat installed?
It is flush-mounted in a standard 60 mm box and powered from 110-240 V AC; we recommend installation by an electrician because it involves 230 V and HVAC connections.

Same ecosystem

Works together

Devices that run in the same smart-home ecosystem.

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FrankEver Sprinkler Controller FK-06X Powered by Shelly, 6-Zone WiFi

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—

FrankEver Smart Water Valve DN20 — Wi-Fi motorized ball valve

—

FrankEver Smart Water Valve DN15 Powered by Shelly (WiFi, BLE)

—

Ogemray Releu Inteligent 25A Powered by Shelly WiFi Bluetooth - main

Ogemray Smart Relay 25A Powered by Shelly WiFi Bluetooth

—

Same category

Questions about this product?

A CasaSmart manager calls you within 1–2 working hours and answers anything — compatibility, install, alternatives.

+373 60 944 922

Updated: 18 June 2026· reviewed by CasaSmart Expert Team

Compatibility