Review of Somgoms Smart ZigBee Switch Without Zero Line On A Seven-story: Home Automation 2022. Hello everyone! Today our review will be devoted to one smart ZigBee switch, which we will install instead of the usual one and get a smart chandelier in our smart home. Instead of the usual relay, a triac is used, which does not emit any sounds during operation, unlike a clinking relay. You can control the lighting now even without being at home, having only a smartphone with Internet access at hand. It can be turned on / off by schedule, by motion detection, or even by automation at sunrise or sunset. But its biggest plus is that it can be installed instead of any switch, it does not need a zero line.
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Zigbee Smart Button Wall Lamp Switch With Neutral/ No Neutral EU/UK AC90-240V Tuya Wireless Control Alexa Google Home Compatible
Packaging and equipment
Supplied in a small cardboard box without logos or other distinctive signs. Just an inscription Smart home. On one of the edges there is a small sticker with a model, namely ZS-TYB1-SF-11ZG-W, indicating the number of buttons (there are both one, two and three switches) and voltage, in my case 220 Volts.
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Inside we have the switch itself, the instruction manual, the capacitor and two screws for fastening.
The instruction is executed quite well, they were not even stingy to print it in color. From the instructions, this is only a wiring diagram, a QR code for downloading the Smart Life application and an indication of the maximum load, which for LED lamps should not exceed 120 watts per line, for energy-saving lamps 200 watts on the line, and for ordinary bulbs up to 500 watts.
The capacitor is marked WQC 475J500VDC. According to the datasheet, the functions are “Metallized polypropylene film interference suppression capacitor”, rated voltage 250 Volts, capacity up to 10 microfarads. Operating temperature range from minus 40 to 110 degrees Celsius. There is only one minus in it, there is no insulation on the contacts, I recommend putting them in heat shrinkage.
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I decided to choose a regular switch, and not with a touch button, as you saw in my last review. Also, this switch works for us using the ZigBee protocol, which means that a ZigBee gateway will be needed for it. The link to this switch, as well as the version with WiFi, and the ZigBee gateway, I will leave in the description under the video. You can buy a switch for 1-2 or 3 buttons. I have one chandelier, so only 1 button. Under the button there are two LEDs indicating the operation, blue and green.
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The dimensions of the switch are 86 by 86 millimeters. Depth 41 mm. The socket is needed, for us it is standard, round.
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For ease of installation, the switch, as it were, consists of two parts, the upper part with the button and the switch itself. As you can see, the on / off button is located in the center of the switch, but there is room for two more buttons.
Gently prying the top of the board, pull it out of the connector. These are, in fact, the brains of our smart switch.
The ZigBee ZS2S module is responsible for the cleverness of the device. It consists of an RF processor chip (EFR32MG21A020F768IM32-B) and several peripheral components with a built-in 802.15.4 PHY / MAC Zigbee network protocol stack.
Remove the protective plate. We unscrew three small screws and take out our board.
As a control element, instead of the relay we are used to, a BTA16-800SW triac is installed. The manufacturer did not skimp on it with a rather large radiator. But if you look closely, the radiator is simply used of the same type, for 1-2 and 3 push-button versions of the switch.
Soldering and installation are normal, I did not see the solder snot and not washed off flux.
There is also a “buzzer”, which beeps every time you turn it on and off. If desired, you can simply evaporate it. Which by the way did I do, because the squeaking switch, especially at night, is complete evil!
Mounting
Before installation, we will check the work on the demo stand. I want to check how much the condenser heats up. We connect it in parallel with the lamp, it not only serves to limit the flickering of the lamp, but also to power the smart switch, as if acting as a zero line. When you turn on or off the light, a small peak is heard, this is the number, and I wanted to call this switch silent. I tried to disconnect the capacitor, everything works without it. I will still follow the instructions and install this capacitor. In the reviews, people wrote that they say it was buzzing, but, frankly, I did not hear anything.
After half an hour, the condenser and the switch were very weak, so I don’t see any fears for installation.
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There is nothing complicated in the installation, we de-energize the line and dismantle the old switch.
We connect the wires to the contacts L and L1, we fix our switch to the socket box using the bolts from the kit.
Now we snap on our cover and the switch is ready to go.
The next step is to remove our chandelier and hook up the condenser. There is also nothing complicated in this. Everything works without problems, the sound of switching on and off no longer beeps, just a small click-click from the button. I don’t understand why it was necessary to install this squeaker, the Chinese are such Chinese.
Software
I will say it again – this is a version of the switch with the ZigBee protocol, which means that a ZigBee gateway will be needed to work in a smart home. We reset our switch, for this we turn it on and off 5 times, and for the sixth time we hold the shutdown button for 5 seconds until the switch beeps three times. The LED will then start blinking.
Install and launch the Smart Life application, click + in the upper right corner and select any device with the ZigBee protocol. Next, we select the gateway to connect, make sure that our LED is blinking quickly and proceed to search for the device.
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The device was found and identified as A-ZB Switch, renamed it to the guest switch. Unfortunately, you cannot control the switch from the main window of the program. When the switch is physically changed, the current state will change in the program as well. You can turn off and on the light not only from your home WiFi network, but from wherever there is an Internet connection.
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Going inside the plugin, we see 1 on / off button. If there are 2 or 3 buttons, then there will also be 2 or three buttons. I did not really like the indication of work, when the switch is turned off, everything is gray-black, when we turn it on, the button turns black. As for me, the turned on button would be better made blue, and not essentially in tone with the off.
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You can set it as a different timer to turn off the shutdown by choosing the days of the week and the time when the switch turns on, and then the same thing, but when it turns off.
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Or set a countdown timer, after what time the device will change its status. If it was turned on, turn off, and vice versa. After that, a timer will appear in the menu, which you can either reset or delete, or wait for its execution.
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There are very few settings, but they are. If we have more than 1 key, then we can turn on everything with one touch, I think it’s quite convenient. You can also set the behavior of the switch after a loss of voltage in the network, I always set to remember the state of the device. And you can also turn off the indication LED if it interferes at night.
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I can come up with automation here only either by solar activity, or by opening a door or by a motion sensor. Let’s create a light on when the sun sets and off when the sun rises.
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As you can see, in a smart scenario, you can not only turn on or off each switch, but all together, you can also create a countdown timer. Immediately they made a script for changing the status when the light was lost, as well as the ability to change the status of the backlight. I choose to turn on the light. And I repeat. Same action for shutdown at sunrise.
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The result is such an automation of a smart home.
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conclusions
As you yourself saw, a pretty good switch for organizing a smart home system. Works without scratch. And, in fact, it can be installed instead of any switches, turning any light bulb or chandelier into a smart gadget. For its money, it is quite a normal working solution. Of the minus, I will only note this peak when turned on and off, I frankly expected a triac device to quietly turn on and off, and not a squeak. I deliberately chose the ZigBee protocol connection, because I think that this is a better option than WiFi, especially if you have more than 10k smart home devices. And the squeak of the inclusion is easy to fix with a soldering iron, but why this was originally, I still do not understand. Without a conductor, it also works and this is in +.
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