# Temperature and Humidity Monitoring Switch Sonoff THR320 TH Origin — Wi‑Fi smart sensor switch for remote monitoring

**URL:** https://aio.lv/en/product--sonoff-thr320--8604350
**Data updated:** 2025-11-27 22:55 (EET)
**Category:** Home Automation
**Manufacturer:** Sonoff
**Manufacturer code:** THR320
**EAN:** 6920075777536
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 16.99 €
**Prices and availability valid until:** 2026-07-25 23:59
**Price without VAT (21%):** 14.04 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sonoff-thr320--8604350

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.89 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

Sonoff THR320 TH Origin is a Wi‑Fi temperature and humidity monitoring switch that combines environmental sensing with remote control. It measures ambient temperature and humidity and can switch connected loads based on conditions via the app or cloud. Suitable for HVAC monitoring, greenhouse, server room protection and home automation tasks; provides remote alerts and automated control.

## Long description

The Sonoff THR320 TH Origin is a Wi‑Fi enabled temperature and humidity monitoring switch with a 20 A relay designed for remote environmental control and automated load switching. The device accepts external sensors via an RJ9 4P4C connector and works with temperature, humidity and soil moisture probes. It supports eWeLink app control, LAN mode, Home Assistant and IFTTT integration, and voice assistants including Amazon Alexa and Google Assistant.
Advantages
The THR320 combines a high‑current 20 A relay with support for multiple sensor types (DS18B20 for temperature, SI7021 for humidity, MS01 for soil moisture), allowing it to control high‑power loads such as underfloor heating and pumps. Real‑time monitoring, configurable alarms and exportable historical graphs (hour/day/month, up to 6 months in xlsx) enable informed automation and diagnostics. Built‑in LAN support ensures local control when cloud access is unavailable, and the device meets UL and RoHS material standards with a fire‑resistant PC V0 enclosure and enhanced wiring protection.
Suitable for
Home heating systems and underfloor heating
Greenhouses and irrigation control
Indoor pools and wineries
Terrariums and plant cultivation
Server rooms and small HVAC monitoring
Key specifications
Manufacturer: Sonoff
Model: THR320
Power: 100–240 V ~50/60 Hz, max 20 A
Wi‑Fi: IEEE 802.11 b/g/n (2.4 GHz)
Supported sensors: DS18B20 (temperature), SI7021 (humidity), MS01 (soil moisture) via RJ9 4P4C
Dimensions: 98 × 54 mm
Material: PC V0 (fire‑resistant)
Integrations: eWeLink app, Home Assistant, IFTTT, Amazon Alexa, Google Assistant
How to use
Connect the THR320 to mains power and attach the appropriate sensor to the RJ9 4P4C port. Install the eWeLink app and add the device following the app instructions to connect it to your Wi‑Fi network. Configure sensor type and control rules in the app, create schedules or use Auto mode for conditional switching based on sensor readings, and enable notifications to receive alerts when configured thresholds are crossed. For local control, enable LAN mode in the app to operate the relay without cloud access.
Usage recommendations
Use suitable sensors for the measured parameter (DS18B20 for liquid‑proof temperature measurement, SI7021 for air humidity, MS01 for soil moisture). Mount the relay on the included DIN rail in a dry, ventilated electrical enclosure and follow local electrical codes when wiring high‑power loads. Regularly review exported historical data for system tuning and set appropriate safety thresholds to prevent equipment overload.

## FAQ

### How much does the Sonoff THR320 TH Origin — Wi‑Fi Temperature & Humidity Switch cost, and is it available for purchase?

The price is 16.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 11 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 02.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Sonoff products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Sonoff service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/8604350/51656445_large.webp