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Climate Monitoring WEB Interface Using 1_Wire™ Sensors

Set up sensors to monitor temperature, humidity, and light levels in computer laboratories. Create a user-friendly web interface and database for data storage and analysis.

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Climate Monitoring WEB Interface Using 1_Wire™ Sensors

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  1. Climate Monitoring WEB Interface Using 1_Wire™ Sensors Imad Hoteit Hassan Wehbe

  2. Outline • Project Summary • Standards • Functional Description • Inputs and Outputs • Modes of Operation

  3. Outline • Block Diagrams • Flowcharts • Parts List • Datasheet Specifications • Testing • Schedule of tasks

  4. Project Summary • Monitoring temperature and humidity in computer laboratories will assist in maintaining facilities and hardware. • Light sensors can be used to keep track of laboratory usage and even reduce the electricity bill.

  5. Project Summary • The purpose of this project is to set up these sensors, create a user-friendly web based interface (applet) and a database that will hold previous data and provide query abilities to the applet.

  6. Standards • MySQL protocol over TCP/IP(DSTP) • Operating System: Windows or Linux Platform • Dallas Semiconductor “1-Wire” devices • Point Six, Inc HA5 adapter to ASCII protocol • IEEE’s “9 pin” Serial Connection, RS-232

  7. Standards

  8. Functional Description • Hardware Interface • The sensors will be distributed along two wires that go through different rooms of Jobst hall; these are connected to the HA5 adapter.

  9. Functional Description

  10. Functional Description • Applet • The applet will run on a web server and will query the sensors for readings. • Data will be recorded in a database for later use. • Many applications could be added to the applet making use of the records in the database. These have not been decided yet.

  11. Functional Description

  12. Inputs and Outputs • Inputs: • Light, temperature and humidity i.e. sensor readings • Input from the user • Request history of a sensor • Update the readings

  13. Inputs and Outputs • Outputs: • Output displayed to the user from the interface • Current status of all sensors • History for selected sensor • Data sent and saved in the database

  14. Modes of Operation • Applet • Display historical data • Get immediate sensor update • Sensor Query Daemon • Discover sensors on network • Request sensor readings • Update database

  15. Applet Flowchart

  16. Sensor Query Daemon Flowchart

  17. Parts List • Point Six, Inc manufactures all these devices • D2Photo Light Sensor • DS1820 Digital Thermometer • HMP-2001S 0-100% Digital Relative Temperature and Humidity Sensor • HA5 RS232 to Isolated 1-Wire Host Adapter • T8A 8 Channel 12 bit Analog 1-Wire CARD • T8D 8 Channel Digital I/O 1-Wire CARD

  18. Datasheet Specifications • HA5 Adapter • Drive capability: 200 sensors • Maximum cable length: 2000 ft • Power Supply • Power received: 110V/60Hz • Power provided: 5V/2A

  19. Datasheet Specifications • DS1820 (Digital Thermometer): • Temperature is read as a 9-bit digital value • Range: -55°C to +125 °C with ±0.5 °C -67 °F to +257 °F with ±0.9 °F • Converts temperature to digital word in 200ms

  20. Datasheet Specifications • D2Photo (Light Monitor): • Returns ON or OFF • Photosensitivity Spectral Range: • Min: 730 nm • Max: 1100 nm

  21. Datasheets Specifications • HMP-2001S (Humidity & Temperature sensor): • Collects: • %RH (12 bit) (0-100% range) • Temperature data (13 bit - ±0.038 °F) • All sensors have a unique 64-bit electronic serial number

  22. Testing • The HA5 was accessed using the HyperTerminal program. • Baud rate: 115200 bits/s • Data bits: 8 • Parity: None • Stop bit: 1 • Flow control: None

  23. Timing

  24. Schedule of Future Tasks • Winter Break • Investigate and (hopefully) test Database usage • Research JDBC • January, February • Complete main objective of project

  25. Schedule of Future Tasks • March, April, May • Tentative Implementation of additional features • Plots based on historical data • Generation and usage of a general configuration file • Capstone Presentation • Winning the award 

  26. Climate Monitoring WEB Interface Questions

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