Description
TH Origin (R3) WiFi smart relay – Sonoff THR320, 230V / 20A, compatible with temperature/humidity sensors
Sonoff THR320 is the new R3 version in the TH Origin series – a WiFi smart relay that allows automated control of electrical equipment based on temperature, humidity or soil moisture. Ideal for heating, ventilation, irrigation systems and much more.
Remote control over WiFi
Control the relay anytime and from anywhere directly from the eWeLink app, with no additional hub required.
Compatible with smart sensors
You can connect the following sensors (not included):
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THS01 – temperature and humidity sensor (recommended)
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SI7021 / AM2301 – temperature and humidity sensors
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DS18B20 – waterproof temperature sensor
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MS01 – soil moisture sensor
The measured values can be used to automate the connected devices.
Smart automations
You can set operating modes in the app:
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Manual – switch the device on/off from the app
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Automatic – operates the relay based on temperature, air humidity or soil moisture (a single measurement type is chosen for the automation)
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Push notifications – get alerts when the measured values exceed the set thresholds or when the relay changes state
Sensor data history
The eWeLink app saves and charts the measured data for a period of up to 6 months, directly on your phone.
Other useful features
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Real-time status check (on/off)
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Momentary switching (e.g. 0,5s / 1s)
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Timer, on/off scheduling, countdown
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Shared control with other family members
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Grouping of devices by room and smart scenes
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Compatible with Amazon Alexa, Google Assistant, IFTTT and Google Nest
Easy DIN rail mounting
Includes an adapter for mounting in the electrical panel, on a DIN rail.
Connectivity
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2.4 GHz WiFi network
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Quick adding in the app via Bluetooth
Manufacturer: Sonoff
App: eWeLink (Android/iOS)
No hub required!
Practical use cases
- Fitted to the boiler or the heating circuit, it automatically regulates the temperature according to the daily schedule, reducing energy waste.
- Used to switch the heating on before you get home, controlling everything from the app wherever you are.
- With the MS01 soil moisture sensor, it automatically starts the irrigation pump when the soil becomes too dry and stops it when the set threshold is reached.
Technical specifications:
| Model | THR320 (TH Origin) |
| Protocol | WiFi 802.11 b/g/n 2.4GHz |
| Supply voltage | 100–240V AC, 50/60Hz |
| Maximum load | 20A |
| Sensor connector | RJ9 (new in version R3) |
| Automations | up to 8 custom temperature/humidity/time programmes |
| Data history | up to 6 months, .xlsx export |
| Dimensions | 98 x 54 mm |
| Material | PC V0 (flame-retardant) |
| Colour | White |
| Compatibility | eWeLink, Amazon Alexa, Google Home |
The THR320 is the ideal choice for anyone who wants to cut heating bills through smart, programmable temperature control.
