preface ： "Is your home really safe?" This is a sentence on the snail housekeeper's official website, and it is also a question in our mind. Let's first look at the following set of data

From the above data, we can see the vulnerability of the current door lock anti-theft system. In addition, the last time I installed an intelligent lock in my home, I had a chat with the lock installer. At present, A/B locks are children's for professional thieves, and they can be solved in a few seconds. Some of them can be opened in ten seconds with a small piece of tin foil. General locks include safes, The master of unlocking has studied, and the thieves have become more intimate. Especially at the end of the year, there were several cases when we had security guards in the garden. But after the lock is locked, the difficulty is increased. The snail steward provided by Beijing Chuangchuang Future Technology Co., Ltd The smart door latch solves this problem by adopting military grade 128 bit encryption, which can automatically reverse the lock, and can be unlocked with mobile phones and electronic keys. It turns ordinary locks into smart anti-theft locks, which can play a big role at a small cost. Thank Lei Feng.com（ //tryout.leiphone.com ）Give this trial opportunity!

-----Unpacking appearance-----

▼  The packaging is wrapped with a protective film to effectively protect the packaging appearance

▼ The packaging box is wrapped on a small cardboard box with striking white words on red background On the front are the relevant attachments of the product and the company's relevant information, WeChat and Weibo QR codes

▼  On the side is the snail butler logo and the main performance of the smart latch

▼ Open the lid of the packing box, which is packed with sponge, and there is Snail Housekeeper The intelligent latch can effectively prevent vibration during transportation to ensure its quality.

▼ The upper part of the latch is gold, and the lower part is black gray, There is a large round switch button on the front, which can be manually switched latch On both sides are fixed switches on the base.

▼ The following are the battery, base, installation instructions and operation instructions

▼ The bottom is mainly divided into three parts, the anti lock button adapter (this interface part is buckled and can be taken out), the middle is the battery compartment, and the other side is the fixed seat with the adjustable height of the handwheel. The two metal feet are magnetic and become fixed (magnetic reinforcement point is recommended).

▼ Open the battery door, you can install four No. 5 batteries, and one switch in the middle is the direction switch of the switch lock (it takes effect to change the direction of rotation when the battery is reinstalled after pulling)

▼   The hand wheel can adjust the height of the fixed seat to make its latch parallel to the door, which can be adjusted about 3mm outward.

▼   Anti locking button adapter (this part is buckled, which can be taken out and replaced with a suitable one There is only one adapter interface at present, and it is recommended to have multiple adapters in the future Adapter selection ）

▼ Electronic key It's a little like the goldfish we played when we were young The front mouth is the USB charging interface!

▼ Four batteries of No. 5 2A are attached

▼   Main description and functional parameters of door latch:

▼ The installation and use instructions describe the specific methods of installation and use.

----- Installation- ----

▼   Working current: The current can reach 100mA during operation, and it can be used for more than half a year in normal use ; What to do if the power is low? This is a problem that everyone is worried about. The latch is designed with a low power alarm and an ultra-low power alarm. When the power is lower than the set safety value, the latch will automatically open.

Low voltage test:

    Adjust the voltage to about 4.5V, that is, use three batteries to supply power directly, and use an unused key to replace the other battery. When the door latch is opened and closed, it will remind us that the voltage is low, and we need to replace the battery at this time. Through this test, we can dispel our concern about replacing the battery when the voltage is low. See the following test video for details:

Installation and fixation:

a. Rotate the anti lock knob to the horizontal position, clean the surroundings of the anti lock knob, tear off the 3M off line paper of the base and stick it to the anti lock knob position of the door lock.

b. Open the latch battery cover and set the direction, which should be consistent with the direction of the door's anti lock movement.

c. Use a coin of 1 yuan to turn the adapter button to the horizontal position, then align the door latch adapter button with the anti locking torque and snap it in. Adjust the master wheel to fix it horizontally with the anti-theft door, and the installation is completed

Add electronic key:

Press and hold the round button of the latch, hear the voice prompt, check the button to enter the pairing state, place the electronic key close to the latch, press the key button, and then hear the prompt "Key added successfully"

Matching dimension of back lock buckle:

Because my lock is an old style lock and does not match the matching button, the size of my anti lock button is: the length of the button is 30mm, the width is about 11mm, and the height from the bottom of the button to the door is about 35mm （ Anti lock catch See the figure above for standard matching size) In addition, the height of the adjustable handwheel is also a little low, so I took off the fitting buckle and fixed both sides with two coins for installation, but I'm still afraid of slipping; In contact with the manufacturer, the manufacturer hopes to have a variety of options for the adapter button, and the manufacturer responds that there are different options for the adapter button in the later stage; Since there is no independent anti lock, it has no impact on the latch by using the normal key for anti lock, so it can also be used with confidence.

▼ Press the round switch button to unlock.

-----APP operation-----

▼   Scan the installation QR code of the manual, download and install it, and open Bluetooth after installation (the door latch communicates with the mobile phone through Bluetooth)

▼   After the automatic connection and pairing is opened, click the round icon of APP to control the switch lock. Click the lock icon in the upper left corner to set the lock, such as automatic lock closing, voice prompt, etc

-----Operation diagram-----

▼   Switch lock demonstration:

Conclusion: Snail Housekeeper Smart Door Latch can transform an ordinary anti-theft door into an intelligent door lock without troublesome procedures such as re changing the lock, which can achieve the purpose of economic benefits and practicality APP、 The equipped key is locked; When we forget The latch can be automatically locked when it is locked ； It can be used for more than half a year in normal use, The latch is designed with low battery warning and ultra-low battery alarm. When it is lower than the set safety value, the latch will automatically open, relieving our worries.

If the concept of anti-theft is based on giving a warning when the thief starts to act, giving the owner an opportunity to deal with it, so as to avoid greater losses and injuries when entering, it is recommended to increase the network connection and send a notice to the mobile phone terminal in case of abnormalities (when someone is at home, a security time period can be set on the APP terminal). In addition, it is recommended to use multiple ways to trigger the alarm for new products in the later stage, For example, infrared ray, sound, magnetic lock induction can alarm, and it can also be associated with the monitor for alarm; If used outside the door after closing the door The remote control distance of the equipped electronic key is relatively short, and the remote control can be carried out only when it is near the door. The distance can be properly adjusted farther; Just press the button of the latch to start the anti lock button. There may be a bug. It may be better to use fingerprint or sensor; It is also suggested that the height of the fixed seat can be increased appropriately; The size of the anti lock buckle is equipped with different models, or the adjustable structure can be used by more people.