Mood Tracker
An emotional journal based on button inputs for daily mood tracking
Author: Miriam Constantinescu
GitHub Project Link: https://github.com/UPB-PMRust-Students/project-miriamct20
Description
A simple mood tracking device that allows users to record their daily emotional state by pressing buttons. The device saves these states and displays a graph of the last 7 days on a small LCD screen, providing a visual representation of emotional patterns.After the 7 inputs a mood analysis will be done via ChatGPT with its API
Motivation
I chose this project because keeping track of one's emotional state can be beneficial for mental health awareness. A physical device with simple button inputs makes the process of mood tracking more tangible and accessible than smartphone apps, potentially encouraging more consistent usage. I'm also interested in creating a device that combines hardware interaction with data visualization.
Architecture
The main components of the system are:
- Input Module: Buttons for mood selection (happy/sad/neutral)
- Storage Module: EEPROM for persistent mood data storage
- Processing Unit: Raspberry Pi Pico W as the central controller
- Display Module: LCD screen for visualization of mood data
- Audio Feedback Module: Sound output for interaction confirmation
These components interact as follows:
- User inputs mood via button presses
- The Processing Unit registers the input and stores it in the EEPROM
- The Processing Unit retrieves historical data from EEPROM
- The Processing Unit processes data and generates visualization
- The Display Module shows the mood history graph
- The Audio Module provides feedback sounds for interactions
Log
Week 5 - 11 May
- Set up development environment
- Created initial project structure
- Researched EEPROM interfacing with Raspberry Pi Pico
Week 12 - 18 May
-Initialized the Rust project and strated working with the software -Finished the hardware for the milestone -Research in data visualization with matplotlab
Week 19 - 25 May
Hardware
The project uses a Raspberry Pi Pico W as the main controller, with a 2.4" LCD screen for display, a TPA3118 mono audio amplifier for sound feedback, and an AT24C256 EEPROM module for data storage. Buttons for input and basic resistors are used for the interface.
Schematics
Bill of Materials
| Device | Usage | Price |
|---|---|---|
| Raspberry Pi Pico W | Main microcontroller | 40 RON |
| 2.4" LCD Display | Displays mood history graph | 40 RON |
| TPA3118 Mono Audio Amplifier | Provides audio feedback | 20 RON |
| AT24C256 EEPROM Module | Stores mood history data | 9 RON |
| HQ830 Breadboard Kit | For prototyping | 22 RON |
| Push Buttons and Resistors | User input interface | 5 RON |
Software
| Library | Description | Usage |
|---|---|---|
| LittleFS | File system for microcontrollers | Storage of mood data on the Pico |
| ST7789 | Display driver for LCD | Interfacing with the 2.4" LCD display |
| embedded-graphics | 2D graphics library | Creating the mood history graph |
| I2C-EEPROM | EEPROM interface library | Communication with the AT24C256 module |
| pico-sdk | Raspberry Pi Pico SDK | Core functionality for the Pico W |
| embedded-hal | Hardware abstraction layer | Consistent interface for hardware components |