With the deepening and popularization of the whole house intelligent ecosystem, smart door locks, as an entry-level smart home product, are gradually integrated into the whole house intelligent ecosystem, and with the technological development, the continuous popularization of the industry and the lowering of the price threshold in recent years, our acceptance of smart door locks has gradually increased.

　　Every user who changes from a traditional door lock to a smart door lock will believe that they can’t go back after using it, especially those friends who have forgotten their keys and been stolen from their homes because the door locks are unsafe, and they must feel the same way. But in contrast, the products of smart door locks are uneven and there are many standards, so people can’t start to choose. So how do we choose smart door locks with different price segments?

　　Step 1 be safe

　　What kind of door lock can be called a safe door lock? It mainly has three points: C-class lock core, explosion-proof lock body and EAL5+ certification.

　　According to the national standards, the safety attributes of lock cores can be divided into three levels: A, B and C. The C-class lock core is the lock core with the highest safety level stipulated by the national standard at present, so you can directly identify the C-class door lock when purchasing. Explosion-proof lock body is to prevent violent lock picking, unless it breaks your door, you can’t get in! The final EAL5+ certification is the chip security level of the smart door lock. If the chip security level is not high, it will be cracked by hackers through software.

　　In addition to the above points, the security function of the smart door lock is also an important point that can not be ignored, such as whether it has the functions of supporting the false alarm, anti-picking alarm, trial and error alarm, etc. Otherwise, when an accident comes, there is no way to ensure our safety. It should be noted that the main control circuit board of the door lock must be on the inside of the door lock, and there are certain security risks if it is on the outside.

　　Step 2 be smart

　　Another key point of smart door locks is the intelligent ecology. If a door lock can’t access an intelligent ecology, it can’t be called a smart door lock, but at most it can be called a "multifunctional door lock". The reason why the smart door lock is called "smart" is because it is closely related to smart home and is the first portal of smart home, so choosing smart door lock is to choose the smart ecology you want to use.

　　At present, major brands are striving to build their own smart home ecology, among which Xiaomi, Tmall, Huawei and Apple are well-known. However, when we choose the brand of door lock, it will also affect your subsequent choice of smart home, such as Xiaomi for Mijia, Huawei for HarmonyOS, Apple’s HomeKit, Midea Mercure, Haier’s Haier Smart Home, etc., so you must first determine the smart ecology to be used in the future before buying the door lock, so as to bring the best use experience.

　　Another point is the battery life. If the battery life of the smart lock is poor, the battery needs to be replaced or recharged every once in a while, and the experience will be greatly reduced. Therefore, it is best to choose a smart lock with two batteries when purchasing, even if the cat’s eye battery is dead, it will not affect the normal opening and closing of the door, and the smart lock with poor battery life is not very recommended for everyone to buy.

　　For example, the M20 smart door lock of Xiaomi adopts a brand-new push-pull form, has an original anti-pinch design, can orient the handle according to the opening and closing of the door, and avoids accidental pinching of the sliding door. It supports seven unlocking methods: fingerprint unlocking, password unlocking, periodic/one-time password, NFC password, Bluetooth unlocking of mobile phone and Homekit, and is equipped with a Mijia security chip with financial-grade EAL4+ security certification, which is cheap, affordable and cost-effective.

　　Huawei smart door lock SE has HarmonyOS financial-grade security protection, adopts EAL5+ security authentication chip, and the password is only stored locally. The C-class direct-inserted lock core supports security alarm, which will automatically alarm when the door is wrongly opened, pried open, and the door is not closed. It also has a long battery life of 15 months and supports emergency power supply unlocking of Type-C charging treasure. If Huawei smart ecology is adopted, this model is also a very good choice.

　　There is also a K9-S of Cadiz, which is also quite cost-effective. It takes into account both safety, convenience and intelligence, and it is very comprehensive in security system and unlocking mode. Compared with F1, this one also adds Bluetooth function, supports fingerprint/password/swipe card/Bluetooth APP/ key to open the door, and the push-pull design is smoother to open the door.