A touchscreen-style coffee machine UI built with Qt 6 / QML and C++. Select a drink, dial in your beans and water levels, watch a live brew progress, then get a quality score based on real-time ambient readings from an Adafruit SHT45 temperature & humidity sensor.

ProjectNSZL/
├── CMakeLists.txt
├── brew_log.txt               — auto-created on first brew
└── src/
    ├── main.cpp
    ├── SensorExtractor.h/.cpp — serial read, parse, and brew log writer
    ├── ASSETS/                — images and meter graphics
    └── qml/
        ├── main.qml           — ApplicationWindow + StackView root
        ├── HomePage.qml       — drink picker
        ├── CoffeeScreen.qml   — beans/water sliders + cup count
        ├── BrewingScreen.qml  — animated progress bar + sensor sampling
        ├── BrewSummaryScreen.qml — quality score, stats, log confirmation
        └── SettingsPage.qml   — serial port selector

• macOS with Homebrew

• Qt 6

  brew install qt

• CMake

  brew install cmake

# 1. Enter the repo
cd ProjectNSZL

# 2. Configure
cmake -S . -B build

# 3. Compile
cmake --build build -j$(sysctl -n hw.ncpu)

# 4. Run
./build/bin/BrewOS

Apple Silicon: Homebrew installs Qt to /opt/homebrew/opt/qt6. The CMakeLists.txt already adds both Intel and ARM prefix paths — no manual flags needed.

1. Plug the SHT45 into a USB port. On macOS it appears as /dev/cu.usbmodem*.

2. Flash the Arduino sketch in sensor/sensor_sketch/sensor_sketch.ino.

3. The sketch outputs newline-terminated CSV at 115 200 baud:

   temperature,humidity
   

   Example: 21.34,62.10

4. Open Settings inside BrewOS, hit Search Ports, select the correct port, and it connects automatically.

• Four drink cards: Espresso, Cappuccino, Coffee, Americano
• Live temperature badge in the top-right corner (reads from the SHT45)

• Beans slider — 0–10, click the ▲/▼ arrows or tap the track directly
• Water slider — same controls
• Cup count — toggle between 1× and 2×
• Hit CONTINUE to start the brew

• Progress bar fills linearly over 10 seconds
• Shimmer animation overlaid on the fill
• SHT45 is sampled every 2 seconds; readings are averaged for the quality score
• Auto-navigates to the Summary screen when complete

• Animated arc gauge showing the Extraction Quality Score (0–100)
• Temperature and humidity stat cards showing averaged brew readings
• Quality rating: Exceptional / Excellent / Good / Fair / Poor
• Brew automatically saved to brew_log.txt

• Serial port dropdown with Search Ports refresh
• Live CONNECTED / DISCONNECTED status
• Current temperature and humidity readout

Computed in BrewSummaryScreen.qml from the average temperature and humidity sampled during the brew.

idealTemp = 21.0 °C
idealHum  = 62.0 % RH

tempScore = max(0,  100 − |temp − 21.0| × 15)
humScore  = max(0,  100 − |hum  − 62.0| × 4)
score     = round(tempScore × 0.55 + humScore × 0.45)

Because the SHT45 is accurate to ±0.1 °C and ±1.5 % RH, the scoring window is intentionally tight:

To adjust the ideal values, penalty rates, or rating thresholds, edit the qualityScore and rating properties at the top of src/qml/BrewSummaryScreen.qml.

Every completed brew is appended to brew_log.txt in the working directory:

[2025-03-29 14:22:01]  coffee=ESPRESSO  cups=1  temp=21.30C  humidity=62.10%  quality=98/100  rating=Exceptional

The file is created automatically on first brew. Each line is one brew entry.