Do I need a Shelly hub?

No. Shelly H&T Gen3 connects directly to a 2.4 GHz Wi-Fi network and can also be set up over Bluetooth 4.2, with no separate hub.

How is it powered and how long do the batteries last?

It uses 4 AA (LR6) batteries lasting about a year, or continuous power over USB Type-C; the cable and adapter are not included.

What type of screen does it have and does it drain the battery?

It has a graphic e-paper screen that stays legible permanently without spending energy on the display, like electronic shelf labels.

Which smart-home platforms does it work with?

It works with Google Home, Amazon Alexa, Samsung SmartThings and Home Assistant, plus MQTT and webhooks for advanced scenes.

When does it report temperature and humidity changes?

The default reporting threshold is a change of 0.5 °C or 5% humidity, and the screen refreshes on a 0.2 °C or 3% difference.

What warranty and availability does CasaSmart offer?

CasaSmart provides a 24-month warranty. This Mocha variant is currently marked out of stock; contact us for the restocking timeline.

Shelly H&T Gen3 Mocha Wi-Fi Sensor

Name: Shelly H&T Gen3 Mocha Wi-Fi temperature and humidity sensor with e-paper display
Brand: Shelly
SKU: SHELLY-HT-GEN3-MOCHA

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Compatibility

Works with these ecosystems

Protocols

Wi-Fi
BLE

Ecosystems

Home Assistant
Google Home
Amazon Alexa
Samsung SmartThings

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

About this product

Shelly H&T Gen3 Mocha is a Wi-Fi temperature and humidity sensor with a graphic e-paper display that keeps the readings visible at all times without spending battery to stay legible. The 70x70 mm body in a warm Mocha tone sits on its stand or mounts on a wall and includes a digital clock synchronised over NTP.<br><br>The device reports changes from 0.5 °C or 5% humidity and refreshes the screen on a 0.2 °C or 3% difference, so the figures on it stay current. It runs on 4 AA (LR6) batteries for roughly one year of life or continuously over USB Type-C, with no data cable required.<br><br>With Wi-Fi 802.11 b/g/n and Bluetooth 4.2 it fits into scenes with Google Home, Amazon Alexa, SmartThings and Home Assistant, triggering automations on temperature or humidity thresholds.

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

When temperature falls below the set threshold, an automation switches on the Shelly smart heater in the room.

Continuously monitor temperature and humidity in a child's room on the e-paper screen and in the app.

If humidity rises above the threshold, Home Assistant runs the extractor fan until it returns to normal.

Track humidity in a windowless bathroom in a Chisinau apartment.

Throughout the day you check the living-room climate at a glance without opening your phone.

Powered over USB-C next to a desk, it shows NTP-synced time, temperature and humidity.

For the installer

Technical specifications

full spec · wiring · datasheet

Other

Type: Wi-Fi temperature and humidity sensor with e-paper display
Model: S3SN-0U12A

Wireless

Wi-Fi: 802.11 b/g/n 2.4 GHz
Bluetooth: 4.2

Power

Power: 4x AA (LR6) 1.5 V or USB Type-C
Battery life: approx. 1 year

Environment

Reporting threshold: 0.5 °C / 5% RH

Physical

Display: E-paper graphic display
Dimensions (with stand): 70x70x45 mm
Weight: 47 g
Color: Mocha

Full device datasheet

Support

Frequently asked questions

Do I need a Shelly hub?
No. Shelly H&T Gen3 connects directly to a 2.4 GHz Wi-Fi network and can also be set up over Bluetooth 4.2, with no separate hub.
How is it powered and how long do the batteries last?
It uses 4 AA (LR6) batteries lasting about a year, or continuous power over USB Type-C; the cable and adapter are not included.
What type of screen does it have and does it drain the battery?
It has a graphic e-paper screen that stays legible permanently without spending energy on the display, like electronic shelf labels.
Which smart-home platforms does it work with?
It works with Google Home, Amazon Alexa, Samsung SmartThings and Home Assistant, plus MQTT and webhooks for advanced scenes.
When does it report temperature and humidity changes?
The default reporting threshold is a change of 0.5 °C or 5% humidity, and the screen refreshes on a 0.2 °C or 3% difference.
What warranty and availability does CasaSmart offer?
CasaSmart provides a 24-month warranty. This Mocha variant is currently marked out of stock; contact us for the restocking timeline.

Same ecosystem

Works together

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—

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Shelly Wave Pro 2 - Z-Wave 2-channel DIN-rail relay

—

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