= Magic Room: Device-free Sensing of People using Batteryless Tags and Machine Learning =
**WINLAB Summer Internship 2024**\\
**Group Members:** Shriya Das, Xiang Meng, Sam-Fone Cheung, Aly Mustafa\\
**Advisor:** Aggelos Bletsas


== Project Objective ==
Batteryless, ultra-low cost RFID (radio frequency identification tags) tags can serve as additional ultra-low cost antennas; variations of the multipath propagation inside a room offers impressive information for estimating the number of people and their tracks inside a room; WINLAB techniques, including machine learning, will be tested.


== Weekly Progress ==

==== WEEK 1-4 ==== 
For the first few weeks, our group worked solely on the [wiki:pD Plant Doctor] project, also led by our advisor Aggelos Bletsas. 

==== WEEK 5 ==== 
[https://docs.google.com/presentation/d/1IVHxp37dLoeeXByd_AVcU_r4t5fZpaF5VpObRvP3WJ0/edit#slide=id.g2e87caedfd1_1_13 Week 5 Presentation]\\

//Progress: // During our first week of work, we put 150 RFID tags along two walls of the WINLAB conference room. Before putting them on, we recorded the [https://docs.google.com/spreadsheets/d/1daMvb9Ci_dN-KZEvOz5IOwuJlokXugWA9UsHR1Zu1xM/edit?usp=sharing distinct EPC] (electronic product code) of each tag. We spaced the tags 16cm apart to minimize any interference from multiple tags based on their wavelength. We placed these tags in rows around 4 to 5 feet off the ground.

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==== WEEK 6 ==== 
[https://docs.google.com/presentation/d/1-7moUngbOc2PINJ74P3ExGqPDcZm87n6DDz_LIn_XoA/edit#slide=id.g2e8aa2581e4_1_0 Week 6 Presentation]\\

//Progress: // By the end of Week 6, we finished putting 219 RFID tags around the conference room. We had to avoid large areas of the room such as the whiteboards due to metallic interference and the projector wall. Of these 219 tags, we consistently received 200-210 tags and the remaining tags were read infrequently. The low RSSI (Received Signal Strength Indicator) values of some of these tags may be a result of metal studs within the walls. \\ 

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==== WEEK 7 ==== 
[ Week 7 Presentation]\\