Difference between revisions of "F12: All Your Base are Belong to You"
From Embedded Systems Learning Academy
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====Infrared Thermometer MLX90614==== | ====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. |
| − | **LPC2148 | + | *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. | ||
==Conclusion== | ==Conclusion== | ||
==References== | ==References== | ||
Revision as of 07:24, 10 December 2012
Contents
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 |
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| 2 |
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| 3 |
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| 4 |
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| 5 |
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| Week Number | Scheduled Items | Actual |
Parts List and Cost
| Item Number | Items | Cost |
|---|---|---|
| 1 |
Raspberry Pi |
$86.54 |
| 2 |
|
|
| 3 |
|
$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
Hardware Implementation
Software Design
Software Implementation
Testing and Technical Challenges
Testing
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.
