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Plant Doctor/MagicRoom: Sensing Using Backscatter Networks

Shriya

Das

Aly Mustafa

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Xiang Meng

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Sam-Fone

Cheung

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Plant Doctor Project Recap

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Setup

RFID reflector

Potentiometer (Analog Input)

MSP430 (MCU)

Switching RF Transistor

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Measuring Thermistor Values

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Setup

RFID Illuminator

RFID Reflector

Receiving Antenna

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Results

Carrier Frequency (900MHz)

Backscatter Frequencies

(±100-200kHz)

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Magic Room Project Objective

  • Using passive RFID tags to localize people in a room

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Even more tags …

  • 219 tags of which ~200 are frequently read by 3 antennas

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RFID tags

Antenna

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Plans for Next Week

  • Convert frequencies to corresponding temperature values
  • Implement cleaner signal receiving
  • Work on RSSI (received signal strength indicator) heat map
  • Explore prior Magic Room code

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