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Jason Zheng edited this page Jun 16, 2023 · 4 revisions

Welcome to the LESA_SUMM23 wiki! This document is to organize the findings of the Summer 2023 team and hopefully help future students navigate through the ToF Occupancy Sensor Design Lab Site.

Main Tasks:

  • Prototype a low power occupancy sensor that preserves the privacy of a building’s inhabitants.
  • Integrate ToF and Color Sensor using as few components possible. Preferably STM32 boards.
  • Basic Premise: Use the low power Color Sensor to ‘wake up’ ToF to obtain greater information on targets. Integrate several units of sensors using BLE mesh.

Definitions:

  • MCU- microcontroller unit, i.e., microprocessor
  • ToF- time of flight, senses proximity of an object to the sensor.
  • L5- VL53L5CX ToF sensor, the first model used for the ToF project.
  • L8- VL53L8CX ToF sensor, the summer team is to replace the L5 with this newer model.
  • STM32- series of MCUs, powerful and flexible.
  • ESP32- series of MCUs, have wireless capabilities.
  • BLE Mesh- low energy Bluetooth network, allow for multiple device communication.
  • MYSQL- database service used to create a central server for wireless communication.

  Navigating The Design Lab Website: Will only cover parts of the website that the URP students are concerned about.

  1. Wiki Where you can access “How To” instructions and contact information from previous teams.
  2. Forum Discussion board for previous teams. May be difficult to filter out key information. Important threads: “Background Info”, “Project Management”, “Design”
  3. Repository Check out “tags” folder for old project versions. The “working” folder is where active files are, the ones you need to be concerned about.

Project Versions: (See the “tags” folder)

  • Spring + Fall 2019: Nine sensors (first version)
  • Spring 2020: Apollo/Artemis (MCU) + TCS34725 (color sensor), built on the “nine sensors” work of previous year. Code used for this project (still in the “working” software folder):
  • “Artemis Deep Sleep”
  • “Dynamic Range”
  • “Noise Threshold”
  • “RGB to Chrom”
  • “Sensor setup”
  • Fall 2021: Raspberry pi module, prototype of ToF sensor mounted to an overhead frame. LESA backed project that seems to be the backbone of future development. See additional info here: https://github.com/LESA-RPI/Sage_GUI (Might be worthwhile to check out)
  • Fall 2022 + Spring 2023: direct lead to current project.

Necessary Products:

  • IDEs/Monitoring: VSCode + ESP-IDF Extension , Arduino IDE, STM32CubeIDE , PuTTY
  • Code/Document Sharing: Box, GitHub, RPI Design Lab
  • MCUs: STM32 (currently Nucleo F446RE and F401Re, may change to STM32WB series for BLE capabilities), ESP32 (for BLE capabilities),
  • Sensors: VL53L5CX (or VL53L8CX ) ToF sensor, TMD3725 color sensor

Tutorials/Datasheets:

Summer 23 Undergraduate Research Program (URP) Students:

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