Lonsonho: 2300W Zigbee 3.0 Compact Relay with Zero Line, Home Assistant Integration

Hello, friends. In this review, we will look at another Zigbee relay from Lonsonho, designed for the Tuya Smart ecosystem. Some time ago I did a review on a version that works without a zero line and due to the use of a semiconductor trip circuit – completely silent. For those who haven’t watched, the link is in the description. Now it’s the turn of the device with a zero line and an electromagnetic relay.

Bought from Lonsonho Smarthome Store on Aliexpress – value as of publication date $15.05


  • Relay type – single-channel with a zero line
  • Interface – Zigbee 3.0
  • Operating voltage – 220-240 V
  • Maximum power – 2300 watts, or 250 when used with LED lamps

Let me remind you that the version without zero is designed only for 100 watts, you should not use it with LED lamps.


Externally, the versions with and without a zero line are almost identical. Size, shape, DIN rail mounting and even the number of connectors on the pad.

There are also six of them, the difference is that on the version without a neutral there is a COM connector to which one of the contacts of the external switch is connected, and here instead of it – N intended for the zero line

The size of the device is 46 x 46 x 18.5 mm, compactness is its strong point, it can be easily placed even in a small space, for example, in a standard round socket box.

Thickness less than 2 cm – allows you to place on top of it, in the same socket, a physical switch, for duplicating control or a regular socket.


Disassembly is just as simple – you need to remove the back cover, which is fastened with latches. Inside the differences are more visible. Mainly – this is the presence of an electromagnetic relay, which increases the power of connected loads by an order of magnitude.

The TYZS3 control module is the base for relays, switches and similar devices that are intended for Tuya Smart

In the version without zero, the control module is made on a separate board, and has a manual control button. There is no button here – the relay can be manually controlled only with an external switch.

The reverse side of the device. I remind you that there are two-channel models and this version and without a zero line.


The wiring diagrams provide for the use of only a relay, a relay with an external mechanical switch, and a relay with a pair of feed-through switches. Unlike the non-zero version – where two relay contacts are closed – COM and S1, here you need to apply a phase to S1.

The basic connection option is zero and phase are supplied to the relay, output L1 is supplied to the device, zero is common.

I strongly recommend that you strictly adhere to the connectors indicated in the complete insctions, this is not superfluous, since their signatures are duplicated. The same applies to the phase and the zero line, it is the phase that should be broken, zero is the common one.

As I said, there is no button in this version, although there is a hole on the case for a paper clip. But there is simply nothing to click there.

When connected for the first time, the device enters pairing mode. To reset to the factory settings, you need to either quickly turn the power on and off 5 times, or switch the external switch 5 times. By the way, the latter can become a problem if there are small children at home.

More in the video version of the review

Tuya Smart

To work in the native Tuya Smart management environment, you need a Zigbee gateway, no matter what manufacturer, the main thing is for this ecosystem, for example, I have it from Alfawise. We click to add a child device, while the relay should be in pairing mode, and it appears in the search window, although it is displayed as a triple switch. We click on it.

After that, the relay is displayed in the device list, and everything is the same as a triple switch. But if you go into his plugin – then everything is correct – there is only one switch. By clicking on its image, the relay turns on and off.

In addition, a timer option is available – which is configured for a specific time and day of the week, and both once, and you can set the algorithm for working on the days of the week.

As a result of working out the timer, you can turn the device on and off. You can also set multiple timers to turn on and off. In addition, there is a countdown option that will turn off the relay after a specified time interval from 1 minute to 12 hours.

In addition to the gateway plugin, the relay will also be displayed in the general list of devices. From here, you can also manage it and see its status, including the countdown. Together with other gadgets of the ecosystem, the relay can participate in automation.

Moreover, unlike similar devices in mihome – not only as an action but also as a condition. Accordingly, two conditions are available – statuses turned on and off, and three actions – turn on, turn off and switch states.

Relay operation

Management can be duplicated by a manual switch, including a return one. Each press or switch of the switch switches the status of the relay, which is broadcast to the application.

In case of loss of external power and when it is restored, regardless of its state before switching off, the relay will always be off.

More in the video version of the review

home assistant

The relay is supported by zigbee2mqtt integration since version Adding is standard. Turn on the connection mode for new devices.

We turn on the relay in pairing mode, it is activated when you turn it on for the first time, or after resetting it to the factory settings or after deleting it from another zigbee network.

And after a while, it will be noticeable by the fact that the LED on the relay stops blinking, a new device will fly into the system.

Here, the relay is also defined as a triple switch, but unlike the application – where there is only one switch, three are forwarded at once. In addition to them, there is also a connection quality sensor. The relay acts as a router in a zigbee network.

The switches that appear are called as central, left and right.

There is only one worker – the left one, it is he who reacts to pressing the mechanical switch of the relay and can control it.

For convenience, I rename this entity simply to switch, since this is a single-channel relay.

The other two entities do not affect the operation of the relay in any way; if you try to turn them on, they almost immediately return to their original state.

It would be best to just hide these objects, then they will not be visible in the system.

We check in the status panel – now only two objects are available for this device – a communication sensor and a relay control switch.

In my system, the relay replaced the last wi-fi sonoff mini I still had, and is used to control the backlight of the mirror. Moreover, it is controlled as software automation there and the usual control of the switch remains. In addition, the relay has already pulled over a couple of sensors, acting as a router.

That’s all, thanks for your attention.

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