Project weekly record
Team
member: Mohan Sun, Huaning Zhang, Yujie Yan
Project
Objective:
In
this project, the team will design and construct an electronic lock system that
authenticates users through fingerprints and passwords. The system can be
widely used in access control, electronic products and safes. Compared with the
traditional lock and combination lock, this product has the characteristics of
convenience and efficiency under the premise of constant security.
The
following diagram shows the basic working principles of the product.
Fig 1. Block diagram of
project
Schematic
Circuit:
Fig 2:
Schematic circuit of project
Week
1
In
the first week of the project, the team mainly completed the following tasks:
1. Check and confirm
the components.
In
this project, the following components are required.
1 Light-emitting diode (LED). 1 Arduino UNO R3. 1
220ohm resistor
1 Adafruit fingerprint sensor. 1 I2C
LCD display screen. 1 Relay module.
1 Breadboard. 1 Buzzer.
Many jumping wires.
2. Complete the
wiring of display, relay, buzzer and LED.
3. Test the
connection and function of buzzer and relay with Arduino library code and code
written by the team.
Fig 4. Test for relay
Testing
the display directly use the code that comes with the Arduino library. After
the program uploads the Arduino, the word "Hello world" appears on
the screen, indicating that the display is connected to the circuit normally.
Next week plan:
In
the experiment next week, the team is ready to complete the circuitry for the fingerprint
sensor and test its connections and functions with program.
Week
2
In this week, the team mainly completed the following tasks:
Fig 5. Connected circuit for fingerprint
part.
2. Verify the
fingerprint sensor function with code.
Fig 6. Circuit verification results
The
first is to verify the input function of the sensor. When entering the
fingerprint, the command box will require the input twice, and after an
interval of about five seconds, the command bar will prompt for the completion
of the input. The next step is to verify the identification function. When a
fingerprint is recorded, after placing a finger on the sensor again, the
command bar will show the similarity with the existing fingerprint. As can be
seen from the figure of result, there is no problem in connection between the
fingerprint sensor circuit and Arduino, and the input and matching functions
can be carried out normally.
Next week plan:
In next week's
experiment, the team plans to combine the circuits from the first two weeks and
complete the code to make sure the system works as a whole except for the
password part，and a beyboard module will also be added.
Week 3
In the third week of the project, the team
mainly completed the following tasks:
1. Connect 8 pins of keypad to pins of Arduino UNO A2-A9 respectively. The circuit is shown in Fig 7.
1. Connect 8 pins of keypad to pins of Arduino UNO A2-A9 respectively. The circuit is shown in Fig 7.
Fig 7. Connection of the keypad
2. Test the keypad with code. Press all the buttons and the corresponding
character is printed in the serial monitor. Fig 8 shows the result of the test.
Fig 8. Test of the keypad
3. The group modify the code for the buzzer and it
can ring after three password input errors.
4. The group design the codes for
the fingerprint part and password input part. The two parts realize the unlock
and alarm functions respectively. However, when we combine the two parts, the
fingerprint lock system cannot work normally which means there are problems in
the code.
Next week plan:
In next week's experiment, the team plans to combine
the fingerprint system and password input system and modify the code for the
lock.
Week 4
In this week of the project, the team mainly
completed the following tasks:
Modified the code for the fingerprint
sensor system to allow it work as a whole. (keypad and fingerorint sensor
part). When
the program is uploaded to Arduino, the message 'Please input' appears on the
screen. When the correct fingerprint or password is entered, the screen
appears' unlock welcome ', while when the wrong password or fingerprint is
entered, the screen appears' error 'and returns to the input interface after a
second delay.
After three
consecutive incorrect passwords or fingerprints are entered, the buzzer beeps
and the system locks for 30 seconds. In addition, after several special passwords have
been entered in the input interface (defined in programming), the system can
enter the password setting (C273) or fingerprint setting (0000) interface. The following figure shows the menu of these two
interfaces.
Fig 9. Password setting interface
Fig 10. Fingerprint setting interface
Next week plan:
In next week, the group will ensure the system work
properly，tidy up the circuirt and build the cover for the
system.
Week 5
This is the last week of the project, and as can be seen from the previous blog, the basic functionality of the product is now available. Therefore, this week the team mainly did the following work:
1. Optimize the code.
2. Make the shell for the product.
3. Confirm product functions and prepare for next week's bench inspection.
Fig.11 Shape of the final product
At this point, the project has been completed, and in the next few days, the team will complete the project poster, report and prepare for the bench inspection.
Week 5
This is the last week of the project, and as can be seen from the previous blog, the basic functionality of the product is now available. Therefore, this week the team mainly did the following work:
1. Optimize the code.
2. Make the shell for the product.
3. Confirm product functions and prepare for next week's bench inspection.
At this point, the project has been completed, and in the next few days, the team will complete the project poster, report and prepare for the bench inspection.
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