THR316/THR320

Product Overview

Introduction

Product Name	SONOFF TH Origin Smart Temperature and Humidity Monitoring Switch
Product Model	THR316; THR320

SONOFF TH Origin is a smart temperature and humidity monitoring switch equipped with a sensor interface, designed to remotely control appliances based on environmental conditions. With support for the eWeLink app, TH Origin supports real-time data monitoring and automation based on preset temperature or humidity thresholds. Users can view current readings, check historical data, and create intelligent scenes. TH Origin is compatible with TH series sensors (e.g., WTS01, MS01, THS01), making it suitable for scenarios like greenhouse control, smart irrigation, and climate-sensitive equipment management.

Highlights

High-Power Compatible – Handles Up to 20A Load with Ease

With support for up to 20A output, SONOFF TH Origin is ready for home appliances like heaters, dehumidifiers, electric kettles, and more.

6-Month Temperature & Humidity Log – Hourly Data, Exportable to Excel

Monitor environmental changes with hour-level precision for up to 6 months. Analyze trends by hour, day, or month, and export data to Excel for easy reporting—perfect for greenhouses, fermentation rooms, or server closets.

Smart Scheduling – Comfort Meets Energy Efficiency

Set up to 8 automated programs triggered by temperature, humidity, or time. Automatically turn devices on or off to keep your space cozy while saving energy throughout the day.

Voice Control with Alexa & Google Assistant

Control devices and check environmental readings hands-free using your favorite voice assistant. Just say the word—TH Origin will respond to your commands instantly.

Smart Scenes & Multi-Device Automation

Create intelligent multi-device automations based on environmental conditions or device states. Use TH Origin as both a trigger and an action executor to unlock powerful smart home scenarios with ease.

Applications

Greenhouse Climate Control

Automatically switch on fans, heaters, or humidifiers when the temperature or humidity goes beyond preset thresholds, ensuring optimal conditions for plant growth.

Smart Irrigation Systems

Link with the MS01 soil moisture sensor or use humidity levels to trigger irrigation pumps or valves, optimizing water usage in gardens, lawns, or farms.

Temperature-Sensitive Equipment Management

Ideal for server rooms, aquariums, reptile tanks, or wine cellars—ensure devices like coolers, heaters, or ventilation fans activate automatically based on environmental readings.

Home Comfort Automation

Control devices such as dehumidifiers, air conditioners, or electric heaters to maintain a comfortable indoor environment, hands-free and always optimized.

Energy-Saving and Safety Optimization

Avoid running appliances unnecessarily by automating based on real-time environmental conditions—saving energy and extending device lifespan.

etc...

Specification

Model	THR316	THR320
Input	100-240V~,50/60Hz MAX 16A	100-240V~,50/60Hz MAX 20A
Output	100-240V~,50/60Hz MAX 16A	100-240V~,50/60Hz MAX 20A
Wi-Fi	IEEE802.11b/g/n 2.4GHz
App supported systems	Android & iOS
Operating temps	-10℃~40℃
Working humidity	5%~95% RH, non-condensing
Shell material	PC V0
Dimension	98x54x27.5mm
High-voltage connector wire	1.0mm² to 4.0mm²	1.5mm² to 6.0mm²
Rated impulse voltage	2500V
Remark	External preliminary protection with Max. C20A circuit breaker in the supply line is required under all circumstances.

eWeLink Key Features

Device Home Page Functions
Key Features		Feature Description
On / Off		Device on/off state.
Auto Mode	Enable/Disable	Automatically control channel switching based on preset temperature or humidity thresholds.
	Auto mode Schedule Setting	Control by Temp./Humidity Temp. Higher than/Humidity Higher than Temp. Lower than/Humidity Higher than Effective Period State after Effective period Ends
Current Temperature and Humidity Values		Current temperature and humidity values monitoring.
Temperature and Humidity History		Tracks day/last 7D/month/half-year temperature and humidity history. Supports viewing & exporting 6-month historical temperature and humidity records.
Schedule		Set the device to complete the specified action at the specified time.
Timer		Set delayed actions for the device to execute after a specified time
Loop Timer		The device executes a predefined action cyclically at specified time intervals.

Device Settings
Key Features		Feature Description
Third-party Platforms	Alexa	You can control your smart devices through third-party services, including voice control.
	Google Home
	IFTTT
	SmartThings
	Alice
Assign location		Set up the home and room where the device is located.
Share		The device can be shared with other eweLink accounts.
Create Group		After multiple devices are created into a group, you can synchronize all devices in the group.
Smart Scene	Trigger Condition	Temperature ≥ /Temperature ≤ Humidity ≥ /Humidity ≤ Switch On/Off Temp. difference settings Hum. difference settings
	Execution Action	On/Off/Reverse
LAN Control		A control method where the app communicates directly with the device over the same router, without going through the cloud platform. On/Off
Push Notice		After turning on "Push notifications", also make sure to grant notification permissions in Phone Settings > Permissions for the eWeLink app. This allows you to receive push notifications when the device status changes. On/Off Temperature ≥ Temperature ≤ Humidity ≥ Humidity ≤
Offline Alert		Turn on the "Offline Notifications" feature, and grant eWeLink notification permissions in Phone Settings > Permissions. You will receive a mobile push notification 5 minutes after the device goes offline. On/Off
Logs		Records of device status changes. (You can view the operation records of the past three months)
Network Indicator		On/Off
Power-on State		The switch state of the device when power is restored after a power outage. On/Off/Last State
Temperature Unit		Fahrenheit Celsius
Wi-Fi Settings		Configure the WiFi network connected to the device.
Calibration		Temperature Calibration Humidity Calibration
Delete Device		Remove the device from the eWeLink platform.

Installation and Configuration Guide

① Button

Button	Description
Press & hold 5 seconds	Device enters the pairing mode
Single press	Turn on/off the device
Double press	Auto mode enable/disable

② Protective cover

③ Sensor interface

④ Power LED indicator (Red)

Power LED indicator (Red)	Description
Keeps on	Device is on
Keeps off	Device is off

⑤ Wi-Fi LED indicator (Blue)

Wi-Fi LED indicator (Blue)	Description
Keeps on	Online
Flashes two short + one long	In Pairing Mode
Flashes once	Failed to connect to the router
Flashes twice	Connected to the router but failed to connect to the server
Flashes three times	OTA

⑥ Auto mode LED indicator (Green)

Auto mode LED indicator (Green)	Description
Keeps on	Auto mode is on
Keeps off	Auto mode is off

⑦ Mounting base

⑧ Wiring terminals (Visible after removing the protective cover)

Terminals	Description
L Out	Live (Output Terminal)
L In	Live (Input Terminal)
N	Neutral
N	Neutral

Wiring Diagrams

WARNING:

Please install and maintain the device by a professional electrician. To avoid electric shock hazard, do not operate any connection or contact the terminal connector while the device is powered on!
Make sure all wires are connected correctly.

Remove protective cover.

Wiring.

Rail Installation.

Insert the sensor.

Notice：

Compatible SONOFF sensors: WTS01, MS01, THS01.

Compatible sensor extension cables: RL560.

Some old version sensors need to be used with the accompanying adapter.

Add Device

Open eWeLink, tap "+” and select "Add Device", then follow the prompt on the App.

Notice：

It's required to turn on the Bluetooth on your Phone when adding a device.
After powering on, the device will enter the Bluetooth pairing mode during the first use.
The Wi-Fi LED indicator changes in a cycle of two short and one long flash and release.
The device will exit the Bluetooth pairing mode if not paired within 3 minutes. If you want to enter this mode, please long-press the manual button for about 5s until the Wi-Fi LED indicator changes in a cycle of two short and one long flash and release.

FAQ

1. What sensors are compatible with the SONOFF TH Origin?

TH Origin supports THS01 (temperature & humidity sensor), WTS01/DS18B20 (temperature sensor), and MS01 (soil moisture sensor). Only one sensor can be connected at a time.

2. Can I check the temperature and humidity history?

Yes. The eWeLink app stores up to 6 months of hourly temperature and humidity data, which can be exported as an Excel file for analysis.

3. Does TH Origin support automation based on temperature or humidity?

Yes. You can create smart scenes or schedules that automatically control appliances when temperature or humidity reaches a certain value.

4. Can I use TH Origin with voice assistants?

Yes. TH Origin supports Amazon Alexa and Google Assistant, allowing for voice-based device control and environmental queries.