Difference between revisions of "S16: SmartDoorLock"
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=== System Schematic === | === System Schematic === | ||
| − | [[File:CmpE244_S16_SmartDoorLock_PIRSensor.png| | + | [[File:CmpE244_S16_SmartDoorLock_PIRSensor.png|300px|thumb|right|text-top|Fig 1. Motion Sensor Flow Chart]] |
=== Hardware Design === | === Hardware Design === | ||
Revision as of 05:34, 24 May 2016
Contents
Grading Criteria
- How well is Software & Hardware Design described?
- How well can this report be used to reproduce this project?
- Code Quality
- Overall Report Quality:
- Software Block Diagrams
- Hardware Block Diagrams
- Schematic Quality
- Quality of technical challenges and solutions adopted.
SmartDoorLock
Abstract
The frustration when you forget or lose the keys to your door is a common experience. SmartDoorLock provides a mechanism to lock and unlock your door with just your mobile phone, using bluetooth communication. The door also opens automatically when it senses an object approaching from the inside. An additional feature in the project is that a display near the entrance informs you about the weather outside, and gives friendly suggestions accordingly.
Objectives & Introduction
- Communication between Bluetooth Module and Android app
- Locking and unlocking electric strike via Bluetooth with password protection.
- Detecting motion using PIR motion sensor.
- Automatic unlocking the door based on motion detection.
- Reading temperature and displaying suggestions.
Team Members
- Arpita Ramanath
- Sravani Aitha
Responsibilties
- Circuit design for Electric door strike
- Establishing Bluetooth communication between SJone Board and Android app using Uart.
- Building power circuits for PIR motion sensor, LCD and Electric door strike
- Interfacing LCD module with SJone Board using Uart.
- Overall Circuit Integration and Testing.
Schedule
| Week# | Date | Task | Status |
|---|---|---|---|
| 1 | 4/26/2016 |
|
Done |
| 2 | 4/26/2016 |
|
Done |
| 3 | 5/03/2016 |
|
Done |
| 4 | 5/06/2016 |
|
Done |
| 5 | 5/10/2016 |
|
Done |
| 6 | 5/13/2016 |
|
Done |
| 7 | 5/17/2016 |
|
Done |
| 8 | 5/20/2016 |
|
In progress |
Parts List & Cost
| Parts | Cost* |
|---|---|
|
PIR Motion sensor |
$13.87 |
|
Electric Door Strike |
$24.22 |
|
LCD |
$10.99 |
|
BTBee Pro Bluetooth Xbee wireless Module |
$14.99 |
|
SJ-One Board |
$80 x 2 |
Design & Implementation
System Schematic
Hardware Design
Electric Door Strike Circuit
The door strike being used in this project is of the type "fail-secure". This means that when there is no power being supplied to the strike, it remains locked. When a DC power supply of 12V is given, the strike unlocks, which can be detected by the characteristic clicking sound it makes. The 3.3V supplied by our SJOne board is not sufficient for operation of the strike, which needs 12V. Hence, we designed a power supply circuit to supply the strike with 12V. The circuit consists of a 12V supply, a 15V to 12V voltage regulator and a couple of capacitors.
// Put circuit diagram here
Bluetooth Module
The bluetooth module we are using is the BTBee Pro Xbee Wireless Bluetooth Module from Adafruit. The pins of this module is perfectly compatible with the pins of the SJOne board such that it can be directly fixed on to the board (as shown in the diagram).
// Put image of bluetooth on SJOne board here.
The bluetooth module is interfaced with SJOne using UART2. When a connection is established, it is possible to send and receive messages via bluetooth between the Android App and SJOne board. This section does not require any other hardware.
Hardware Interface
In this section, you can describe how your hardware communicates, such as which BUSes used. You can discuss your driver implementation here, such that the Software Design section is isolated to talk about high level workings rather than inner working of your project.
Software Design
Show your software design. For example, if you are designing an MP3 Player, show the tasks that you are using, and what they are doing at a high level. Do not show the details of the code. For example, do not show exact code, but you may show psuedocode and fragments of code. Keep in mind that you are showing DESIGN of your software, not the inner workings of it.
Implementation
This section includes implementation, but again, not the details, just the high level. For example, you can list the steps it takes to communicate over a sensor, or the steps needed to write a page of memory onto SPI Flash. You can include sub-sections for each of your component implementation.
Testing & Technical Challenges
Describe the challenges of your project. What advise would you give yourself or someone else if your project can be started from scratch again? Make a smooth transition to testing section and described what it took to test your project.
Include sub-sections that list out a problem and solution, such as:
My Issue #1
Discuss the issue and resolution.
Conclusion
Conclude your project here. You can recap your testing and problems. You should address the "so what" part here to indicate what you ultimately learnt from this project. How has this project increased your knowledge?
Project Video
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Project Source Code
References
Acknowledgement
Any acknowledgement that you may wish to provide can be included here.
References Used
List any references used in project.
Appendix
You can list the references you used.
