4-Channel Wi-Fi Relay 5-32V AC/DC RF433 for Tuya

Product detailed description

Four-Channel Wi-Fi Relay Module with RF 433 MHz and NO/NC Contacts for the Tuya App 📲

This 4-channel Wi-Fi relay is a universal switching module that turns an ordinary device into a smart device you control from your phone. It has four independent relays, each with COM, NO and NC contacts, so it can both close and open a circuit. You control it through the Tuya Smart or Smart Life app, by voice with Amazon Alexa and Google Home, and thanks to the built-in RF 433 MHz receiver also with a classic remote control, without internet.

You power the module either with 5 V via micro USB or with 7 to 32 V AC/DC on the terminal block. The outputs are galvanically isolated from the power supply, so each channel switches a potential-free (dry) contact or a load of up to 10 A at 90 to 250 V AC or 0 to 30 V DC. It is an ideal basis for controlling gates, electric locks, pumps, lighting or small motors.

Unlike relays powered directly from the 230 V mains, this Wi-Fi switch module is designed mainly for low-voltage installations: 12 or 24 V gate control boxes, cars, caravans, solar systems, garage or workshop wiring. A phone charger, a 12 V or 24 V AC/DC power supply or the voltage already available in the gate control unit is all it needs. It connects to your 2.4 GHz home Wi-Fi network and needs no hub or gateway.

Each channel can work in two basic modes. In self-locking mode the relay stays on until you switch it off. In inching (pulse) mode it returns to its original state by itself after switching, after 1 second by default, adjustable in the app from 1 to 3600 seconds. A pulse is exactly what most gate operators, door openers and electric locks need: it replaces pressing a button. In the app you can also enable interlock mode, in which two channels cannot be on at the same time. Use it, for example, to drive a DC or AC motor back and forth for blinds or awnings.

The NO (normally open) and NC (normally closed) contacts give you freedom when wiring. With COM and NO the circuit is open at rest and the relay closes it when switched on, the classic choice for switching a light or triggering a gate. With COM and NC the circuit is closed at rest and the relay opens it. This is how some gate openers or safety circuits that react to an interrupted circuit work.

Besides control from your phone, the Tuya app offers schedules (daily and weekly), countdown, cycle timer, automatic switch-off after a set time, sharing control with your family and scenes and automations with other Tuya devices. The relay can switch on, for example, when a sensor detects motion or the temperature drops below a set value. If you already have other Tuya Wi-Fi products at home, you add this smart relay to the same app and create shared automations with them.

The built-in RF 433 MHz receiver learns the codes of compatible 433 MHz remotes and wall RF switches, for example the Sonoff RF remote control with four buttons, where each button controls one channel. RF control works locally, so you can open the gate even when the internet is down. The board also has buttons for manual channel control and pairing.

The module comes as an open circuit board with IP20 protection (see photos), so place it in a suitable installation box or control cabinet. You can mount it on a DIN rail with an adapter sold separately. Installation requires knowledge of electrical engineering. When switching 230 V mains voltage, we recommend having it wired by a professional.

Who is this Wi-Fi relay for

• Owners of garage and driveway gates who want to open the gate from their phone and keep their remote control.
• Makers and DIY enthusiasts who need an affordable 4-channel relay module for 12 V or 24 V projects.
• Caravans, motorhomes, cabins and solar systems where only low voltage is available.
• Users of the Tuya or Smart Life app who want to expand their smart home without another hub.
• Installers and electricians looking for a universal Wi-Fi switch with potential-free NO/NC outputs.

Use cases

• Opening a garage gate from your phone: connect the relay in inching mode in parallel to the gate operator button, one channel can control the main gate and another the pedestrian gate.
• Electric lock and door opener remotely: let in a courier or visitor even when you are not at home.
• Pump or irrigation control: use schedules to start a pump or valve at an exact time.
• DC motor direction: a pair of channels in interlock mode turns a motor back and forth, for example for blinds, awnings or sliding mechanisms.
• Turning on a computer or server remotely: a short pulse replaces pressing the power button.
• Switching 12 V and 24 V lighting in a garage, cabin or caravan, from your phone or an RF remote.
• Potential-free contact for a boiler or control unit: the dry contact sends an on/off signal to a device with an external switch input.

Key features

• 4 independent channels: control each relay separately from the app, a remote or a button on the board.
• COM, NO and NC contacts: the relay can both close and interrupt a circuit.
• Potential-free switching: outputs are isolated from the module power supply, switch a dry contact or your own voltage.
• Flexible power supply: 5 V via micro USB or 7 to 32 V AC/DC on the terminal block.
• Up to 10 A per channel: 90 to 250 V AC or 0 to 30 V DC.
• Inching mode 1 to 3600 s: ideal for gates, locks and door openers.
• Channel interlock: safe control of motors in two directions.
• RF 433 MHz receiver: local control with a remote, even without internet.
• Schedules and scenes: scheduling, countdown, cycle timer and automations in the Tuya app.
• Voice control: Amazon Alexa and Google Home.

Technical specifications

Protocols and compatibility

• Wi-Fi 2.4 GHz (IEEE 802.11 b/g/n): connects directly to your home network, no hub needed. 5 GHz networks are not supported.
• RF 433 MHz: receiver for learning 433 MHz remotes and RF switches, for example the Sonoff RF remote control. Works locally, even without internet.
• Bluetooth: listed by the supplier as part of the module, the Tuya app uses it mainly for initial pairing. Everyday control runs over Wi-Fi.
• Tuya Smart and Smart Life app: free for iOS and Android, control, relay status, schedules, scenes and family sharing.
• Amazon Alexa and Google Home: voice on/off control of individual channels after linking your Tuya account.
• Home Assistant and other systems: native support is not listed by the manufacturer. It is a cloud-based Tuya device, we have not yet verified integration with other systems.
• Zigbee, Z-Wave, Thread, Matter: not supported. If you are looking for a Zigbee version, see the SmartWise 4-Channel Zigbee Relay.

Why choose this 4-channel Wi-Fi relay

• Four channels for the price of one device: one board controls a gate, a pedestrian gate, a light and a pump.
• Low-voltage power supply 5 to 32 V: ideal where 230 V is not available or you do not want to run it.
• Phone and remote control: Wi-Fi from anywhere, RF 433 MHz locally, even when the internet is down.
• NO and NC contacts and adjustable pulse: connects to almost any gate operator or lock.

Compared to the Sonoff 4CH R3 4-gang Wi-Fi relay, which is powered from 100 to 240 V mains and controlled via the eWeLink app, you get a low-voltage power supply, NO/NC contacts and an RF 433 MHz receiver, a better fit for gates and 12/24 V installations. If you use a Zigbee gateway, choose the SmartWise 4-Channel Zigbee Relay instead.

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