F12: All Your Base are Belong to You

All Your Base are Belong to You

Abstract

The Automated Security system will monitor a home, and trip an if an intruder passes by the sensor by wirelessly sending a signal to the central unit. The system will incorporate several hardware devices, managed by a Web based GUI for easy activation and deactivation of both the alarm and the system

Objects & Introduction

This system will automate your security and home functions for a higher quality of life

Security Thermal Sensor

• Security Thermal Sensor will capture movement and heat from intruders
• Security Thermal Sensor will send an alarm signal to the server after the thermal value reaches a certain threshold
• Alarm Signal from the Security Thermal Sensor will be sent to the server through Wi-Fi communication

Raspberry Pi or Receiving Server (server)

• Server will receive data from the Security Thermal Sensor
• Server will receive alarm signal and be set to an alarm state until it is deactivated

Team Members & Responsibilities

• Christopher Cheng
  • Wi-Fi Hardware and Software Design
• Tyler Gray
  • Raspberry Pi (server) Research and Web UI
• Prateek Grover
  • Thermal Motion Sensor Hardware and Software Design

Schedule

Week Number	Scheduled Items	Actual
1	Identify Team Identify Hardware Acquire Hardware Design Security Sensor Wire Diagram	Done Done Done Done
2	Wire up Security Sensor to the LPC MicroController and read sensor data Have Raspberry Pi Wi-Fi Connectivity Set up communication from MicroController to Hercules using Wi-Fi Module	Done Done Done
3	Connect Server to Security Sensor Slave Module Create Security Sensor Alarm Protocol Establish Communication Between Raspberry Pi and Microcontroller through Wi-Fi	Done Done Done
4	Create Basic UI	Done
5	Integrate UI with the Server Improve UI Functionality	Done In Progress
Week Number	Scheduled Items	Actual

Parts List and Cost

Item Number	Items	Cost
1	Raspberry Pi	$86.54
2	3x RN-XV WiFly Module - Wire Antenna WRL-10822	Total = $104.85 Each = $34.95
3	Infrared Thermometer - MLX90614 SEN-09570	$19.95
Item Number	Items	Cost

Design and Implementation

Hardware Design

Figure 1: Hardware design for I2C Ir Thermal Motion Sensor and UART Wifly

Figure 2: Implementation of Sensor/Wifly Design

Figure 3: Raspberry Pi Hardware

Testing and Technical Challenges

Testing

File:CmpE146 F12 AYB WiFlyTerminalUARTCom.PNG

File:CmpE146 F12 AYB RaspPiTerminal.png

Figure 4: Wifly UART and Raspberry Pi Communication Test

Technical Challenges

Infrared Thermometer MLX90614

The sensor would not output data therefore the testing of the network connections between the motion sensor module and the raspberry pi could not be tested.

• Could not continue the utilization of the design and could not test and verify the usability of the MLX90614 Thermal Sensor as a motion sensor.

Determine the Problem

The wrong voltage was being passed into the MLX90614 was determined with the use of a multimeter.

• Requires around 3.3V but was getting voltage under 1V
• While minimum pressure was applied to the GND and V_out pins on the LPC2148 microcontroller, the correct voltage was being sent into the MLX90614.
  • We have determined that the problem was with the LPC2148, the pins were not correctly soldered

Solving the Problem

Once we have determined the problem came from the LPC2148, we decided to re-solder a GND pin and a Voltage Out Pin to ensure that we can capture the full 3.3 Voltage going in and out of the MLX90614 system.