This document discusses smart door lock systems. It provides information on how smart locks work using wireless protocols and cryptographic keys to send signals from a device to lock and unlock doors. It also discusses the main functionality of smart locks using Bluetooth and WiFi to open and close doors remotely. Additionally, it covers smart lock access control systems which use a lock controller, smartphone, and cloud to authorize access and command locks to open. It also addresses common smart lock problems such as not locking/unlocking, lights/sounds not working, and accelerometers malfunctioning, and provides potential solutions.

1. Smart door lock system
SHIVANGEE SHUKLA
A281020004
(MID)

2. How smart
locks work?
What is smart lock ?
The smart lock gives an opportunity to get rid of the
house key by using your smartphone to lock and unlock
the door.
For this reason, this technology uses wireless protocol
and a cryptographic key to send signals from the
device.
It means, that you can give access to the third party
even if you are not in the city.But this is not the only
function.
In addition, smart locks can monitor access and
send alerts in critical situations.

3. Smart lock’s main
functionality
Smart lock systems use Bluetooth and WiFi solutions to
open or close the door.
You can use Bluetooth when you are close to your lock.
But via the WiFi, you can open the door from anywhere.
Particularly, most producers have key fobs connected to
the lock that gives access to a physical object.
A key fob is a small security hardware device with built-
in authentication .
It is used to control and secure access to computer
systems, network services, and data.
Smart lock systems provide mobile apps and websites
for sending virtual keys. Moreover, you can grant access
to your friends and relatives by sending SMS or email.

4. Smart Lock Access
Control System
Smart Lock Access Control System.It
consists of the following elements :
o lock controller
o smartphone
o cloud
The smartphone works as the mediator
between the lock and the cloud:
it receives an encrypted message from the
lock and forwards it to the cloud server, and
vice versa.
The cloud server authorizes the smartphone
and gives the lock a command to open if the
user has access rights.

5. Smart lock
security
By now, you should be worried about smart lock
security. Let’s understand how current smart
lock security works
.Those messages that are sent from the lock to
the cloud via the smartphone and back are
encrypted.
bluetooth channel may also offer security
features.HTTPS protects the privacy and
integrity of the exchanged data.
The key is only shared between the cloud server
and the chip.However, it is clear that only
encryption is not enough for providing security.
Indeed, a hacker can catch the message sent
from the cloud to the lock, save it and use
later.Now, it is obvious that smart lock security
issues are the main reason why smart lock
doesn’t work.

11. Smart lock common
problems and possible
solutions
Smart lock security issues are not the only ones. As a
matter of fact, other problems occur as well. Regarding
this, we have gathered not only the common problems of
smart locks but also their possible solutions.
A smart lock doesn’t lock or unlock
As the matter of fact, most users had very bad days
when they couldn’t lock or unlock their smart locks. In
case, if you have one, this can be the possible situation
for you too. Here are some solutions when smart lock
doesn’t work.Check for low batteries.Try to see if you
can manually lock the door.Check the network
communication.If the door couldn’t lock because it wasn’t
shut properly, then it should be re-calibrated to work
again. Additionally, there may also be problems with user
codes or physical obstructions to the lock.

12. There is no light on the front of the lock although the
lock has power
In particular, for the solution, check the LED. Maybe it is
damaged and you should replace it. Remember, that
light is also an indicator of connection as power.
Speaker does not make noise when unlocking and
locking although it has power
In this situation, it is possible that the speaker is broken
or busted within the device. Then you should replace the
speaker according to the guide. Then, if it doesn’t work
replacement of the motherboard may be helpful.
My smart lock doesn’t respond. It is not powering
and the front light doesn’t flash. In this case, the
device can’t connect to any smartphoneFrankly, the
only solution will be the replacement of the batteries.
.My smart lock manually locks but doesn’t connect
to the phone
Firstly, go to the settings and check the Bluetooth
connection. Make sure that the Bluetooth is on and
connected to the device. If Bluetooth is on and
connected, then there may be an issue with the
motherboard.

13. The gears are not functioning
Maybe, one of the gears that are located at the bottom of the lock is broken. Thus, for replacing them you
should follow the guide.
The accelerometer is not working
Obviously, the accelerometer is one of the important parts of the smart lock. It controls the turning of the device
and its speed. So, if it is not functioning properly then you need to replace it. And again, if this doesn’t fix the
problem, then there is a possibility that you may replace the motherboard.
Smart lock consistently reports that the front door is unlocked
Briefly, there can be two possible reasons for this problem:The Z-Wave network isn’t strong enough to properly
ping the lock. In this case, the repositioning of the hub can be helpful.The lock’s Z-Wave module is damaged
and isn’t sending the right lock status to the hub.In conclusion, f the smart lock doesn’t work, they may have
damaged electronic components. Obviously, things can go wrong with the lock itself.If you can’t fix the
problems with your smart lock you can connect to appropriate help centers. Moreover, you can write about
your issue in the Internet forums and user communities. Indeed, there you will find some people with the same
issues. So, they can give you possible solutions to your problem.

14. What should you care
for when buying a
smart locks system?
Now, let me show how you can choose the best smart locks.
Obviously, smart lock security is the main concern for every
user which requires special attention.
So, for excluding possible attacks you should think carefully
about security settings and options.
Moreover, many producers offer the Activity log which gives
additional security and control.
Some smart locks also have Autolock function.
This gives a relative advantage compared to the classical lock
.More importantly, it will be great if you can choose the
producer that offer additional use cases, in-home delivery,
and in-home services.
Moreover, many companies have special web-pages for
supporting customers and raising their awareness.

15. When buying a smart lock, make sure that you clearly
understand what function it offers and how it works.
Indeed, the ideal device should work fast, effective and be
easy to install and use. By the way, if you use other smart
home products, then you should think of their integrity.
Choose those producers that offer the possibility to
connect all the smart home products.If you want a quality
smart lock, it is critical to buy it from the well-respected,
well-known producer.Another important thing, the smart
lock should include a secondary, physical mode of
entry.
This can be a key, a keypad, a fingerprint reader. Never
rely on a wireless connection for 100 percent. Also,
consider having another door with a standard lock, so you
can enter your home in an emergency situation.
As a final point, make sure your family members are
familiar and comfortable with the smart lock. And
remember that in any case, you can check out our guide
for the top smart locks and smart homes security
devices recommendations.

16. Conclusion
The smart lock technology is becoming more
and more advanced. But smart lock doesn’t
work often, so we still use our physical
keys.In this article, we have discussed the
reasons why smart locks don’t work and why
we still can’t incorporate it into our usual
life.Now, it is clear that smart lock security is
the main concern. There is a lot of work for
developers and producers. Also, we still can’t
get comfortable with the idea that our keys
now should be like electronic message or
application. The problems with wireless
connection, low batteries, and faulty device
caused many troubles for smart lock users.