Tool Tracker
Contents
Team Members
Eliot Stein
Zach Steinberg
Hannah Lester
Nathan Schmetter (TA)
Project Description
Tool Tracker is an organization system designed to keep track of the check in/out process of tools in a lab. It involves RFID chips that represent different tools and a software program that monitors the student ID's of people using the tools, the time at which someone checks their tool in/out, which tools are being used, and the rating of each individual tool. Our system is designed to have a simple user experience in which someone could check an item in/out and also see general information about other tools in the lab. This could be used in labs (or any other place that could use a system like this one) to ensure that tools are not damaged or misplaced, and if they are, then the system will be able to determine when and by whom the tool was misplaced and/or damaged.
Challenges
Some that challenges we initially anticipated included:
- Connecting the software to the hardware, using RFID chips, and making the check in/check out console.
- Learning how to properly implement our software to meet our desired goals.
- Learning how to use RFID chips and Raspberry Pi.
- After doing some research, it seemed that a common problem with RFID chips is tag collision and reader collision, meaning that signals can accidentally become overlapped. We anticipated having to make sure that this issue did not happen with our tags.
- Making sure that each group member understands the software in its entirety.
After the project was completed, we reflected on many of the challenges that we faced. These mainly included:
- Making a console that was sized correctly so that all of our hardware could fit inside of it and still be functional.
- We had problems getting the reader to scan, but after a lot of work and research, we were eventually able to make it work.
- We initially struggled with transitions between our different interface pages, but after working with John and doing some trial and error with the coding, we were able to make it so that when a certain button was pressed, the interface would display a new page. Also, we had to make one page transition happen after a tool was scanned, which was the most challenging transition. However, by implementing a "ghost page" in which the code for the scanning function was placed, we were able to make the transition happen.
- Once we had the main project completed, we added in text files so that the data could be stored in a separate place. We struggled with updating the text files properly and combining this code with what we had already made. In the end, they worked properly so that they could record when a tool was checked in/out, who had the tools, what time a tool was checked in/out, and its most recent rating (if it was checked in). However, we attempted to create a way to record an average tool rating using data from the text files, but could not properly implement this method.
Materials and Budget
(Please note all prices do not include shipping and handling fees, but the total cost does include this.)
- $22.50 for 10 RFID Tags
- $39.95 for RFID Reader
- $49.99 for 7-inch LCD Touchscreen
- $39.95 for Working RFID Reader
- Raspberry Pi
- 3D Printer Filament
Total Spent: $187.02
Design and Solutions
Console
One of the main challenges of this project was creating a console that would be able to house the Raspberry Pi, LCD Screen, NFC Shield, and all of the cables that go with their respective parts. As a team, we did not want the console to be big and bulky, so we needed to create a small and sleek console that had enough room to fit all of the system's parts. Using SolidWorks, we designed two parts for our console; a cover and a base. The dimensions of the cover are ____x_____x_____ and the dimensions of the base are _______X_______x_______. The cover has a cut-out for the LCD screen and the base is split into two sections. One side of the base houses the Raspberry Pi and the LCD control board. The other side houses the NFC shield.
Attaching NFC shield to the Raspberry Pi
When Attaching the NFC Shield to the raspberry pi, we originally soldered the connections using a board to connect them, but the issue we ran into there was that the shield and the board both needed to fit inside the console. This issue was resolved by using no board and using male to female wires to connect the shield directly to the pi. There are 6 different connections needed between the pi and the shield for the shield to function. The pin number I will be referring to is the one on the diagram below. One connection needed to be made between the 5v on the shield and pin 1 (or the 3.3v pin). The second connection was between the ground on the shield and pin 9 on the pi. The third connection was between the SCK pin on the shield and pin 21. The fourth connection was between the MISO pin on the shield and pin 18 on the pi. The fifth connection is between the TX (transceiver) on the shield and pin 16 (GPIO pin 23). The final connection was between the RX (receiver) and pin 12 on the shield. Below is also attached a handy wiring chart, but be aware that the shield we used is different from the one used in the chart so the locations of the pins on the shield may be different.
Creating the Interface
In order to create the pages for the interface, I downloaded Python and used IDLE to do my coding. I imported Tkinter, which is Python's standard GUI package. To begin learning how this program worked, I followed this tutorial (https://likegeeks.com/python-gui-examples-tkinter-tutorial/) to learn about things such as a window, label, button, radio button, etc. Then, once I understood the general idea of how the code syntax worked, I started working on individual pages for the interface. I made separate files in IDLE, each one representing a different page. These included the Title Page, Check In/Check Out Page, a scanning page, and more. However, these pages were not functional in the beginning. Specifically, even though there were buttons on the pages, nothing actually happened when the buttons were clicked and the pages were in no way connected to each other. Once I thought that all of the main pages were completed, (I had to add in more eventually once the coding progressed) I put all of the separate page files into one full project file that would hold all of the separate pages. The next step that I needed to accomplish was understanding how I could actually make the pages functional and flow together. I tried following tutorials on YouTube and using Stack Overflow to understand how to make this happen, but I was still struggling to understand how this worked. So, I met with John (a TA for this class) to go through one page transition to see how it worked, in hopes that I could use this code to finish the rest of the transitions. We talked about the purpose of the controller, the show method in Python, and how to make buttons function so that when they are clicked, a command is called. Once we went through these ideas, I was able to finish the rest of the transitions. I then had to add more detail to the pages, such as getting a Student ID to display on the screen as someone pressed the numbered buttons, rejecting ID's that were not our own, continuing to add more pages as we realized more of how we wanted the user experience to work, and more. Once I felt that the coding for the interface was complete, it was then time to combine the code that I had written for the pages with the scanning code for the RFID chips.
In the end, the pages were designed well and provided all of the functionality that we needed. In the future, more complex code could make the pages look more visually appealing, but for now, they accomplish the goals set for this project. We had a total of 11 pages, and a description of each page is listed below:
- 1) Opening Page: This is where a user signs into the system with their student ID. This page also has a button that directs you to the Info Page.
- 2) Reject ID Page: If an entered ID is not already stored in our system as a valid ID, the user will be told to retry their ID.
- 3) Info Page: This displays all 10 tools in the lab, their current status (checked in/out), who has possession of them, and its most recent rating.
- 4) In or Out Page: Asks a user if they are checking their tool in or out.
- 5) Please Scan Page: Has a button that tells the user to press it, then scan their tool. This button actually directs to the Ghost Page, which has the scanning function.
- 6) Ghost Page: This page is never actually seen by the user, but this is where the scanning of the ID happens.
- 7) Already In Page: If a user scans a tool and the system already registers it as being checked in, then they will not be able to check it in again.
- 8) Already Out Page: If a user scans a tool and the system already registers it as being checked out, then they will not be able to check it out again.
- 9) Experience Page: If a user checks a tool in, the system will ask them how their experience was with the tool. They give it a rating from 1-10 and then receive a message based on this rating.
- 10) Thank You Page: If a user checks a tool out, the system thanks them for signing in, and then allows them to return to the home page.
As an example, here is an image of our opening page:
ID Analysis
Zach/Eliot
Gantt Chart
(These are preliminary, and we know that as the semester goes on, we will be able to break down these steps even further.)
Our main steps will include:
- Learning how to code the Raspberry Pi
- Creating the console using 3D-Printing
- Testing with RFID chips
- Programming the software
- Setting up the server
- Debugging the software
- Connecting the software to the hardware
- Creating the poster
- Demonstration
For the most part, we were able to stay on track with our Gantt Chart. We ran into some issues with the reader, which pushed us back slightly. However, once that issue was solved, we got back on track with the original plan. Many of the tasks we accomplished were completed as a group, with one person taking the lead.
Weekly Log
Link To Project Proposal Presentation
Code Explanation and Link to GitHub
The coding that we did for this project was all done in Python. We used Tkinter as a visual interface program that helped us make pages for the screen. This code includes labels, buttons, and many other visual pieces of the interface. We also used source code that we found to help with the scanner. Links to this code can be found in our weekly log. The most challenging element of our coding was combining the code that we made for the interface pages with the scanning code. Also, we initially had a lot of trouble with learning how to code in transitions from one page to another. Once we learned the syntax for one transition, then we were mostly able to mimic this syntax for the rest, with the exception of a few harder transitions.
In addition, we wrote text files that were able to store many pieces of information recorded by our program, such as who checked a certain tool in/out at a certain time, the ratings that tools were given, etc. These are also included in our GitHub.
MAKE SURE TO SAVE TEXT FILES TO GITHUB!!!!!
this link was in the materials and budget -- put in the proper place! Using the RFID Reader with Raspberry Pi
Results
Demo Day
On the Demo Day, we had our console, screen, a desktop, a keyboard, a mouse, and 10 RFID chips, each labeled as a different tool. The table was set up so that our console was towards the front of the table, allowing people to easily test out the process of scanning tools. We had two different example ID's that people could use if they wanted to check a tool in or out. We began each presentation by explaining the basic premise of Tool Tracker, explaining our process and the different components of our project, including the code, the reader, and the different RFID tags. Then, we asked people if they wanted to try checking a tool in/out, allowing them to see how we intended for the user experience to go. After someone checked a tool in/out, we would direct them to the info page so that they could see that their tool was indeed registered correctly.
We intended to have all of this running on our touchscreen. However, a couple of nights before Demo Day, we realized that our screen was no longer powering on. We think that there was a faulty connection with the wires that could not be fixed, therefore forcing us to use a desktop during the demo. Even though this was not what we had planned on doing, we were still able to show people how this process would work and explained that ideally, they would have a touchscreen to use.
Project Poster
- Please note that the total cost included on the poster only includes the cost of the second reader that we purchased, since this was the only reader included in the final product.
Future Improvements
In the future, there are a few ways in which we could see this project improving. These include:
- Using a functioning touchscreen so that the user could interact with the program through a smaller screen rather than a large desktop.
- Allowing an administrator to have additional privileges, including adding/removing students from the system, adding/removing new tools or old ones that have been replaced, etc.
- Updating a server/using a web application that stores information in the cloud so that more information could be held.
- Having more information available about the tools, such as their overall average rating, a time limit on how long someone could have a tool, etc.
- Adding in a "delete" button onto the interface so that someone could delete a mistyped number when they are entering in an ID. Additionally, we would like to find a way to have the ID clear so that if you return to the home page, there is no ID shown, rather than still showing the previous ID typed.
Tutorial
(Updating a text file)
