Sensor Signal Monitoring System

This project is composed of two main components:

1. Microcontroller Firmware (Arduino)

Located in the firmware/ folder, this Arduino sketch handles:

Sensor signal acquisition
Optional filtering or preprocessing
Sending data over serial (USB) to the host PC

2. Python HMI Application

Located in the hmi/ folder, this is a PyQt-based GUI that:

Connects to the serial port
Parses and displays sensor data in real time
Optionally logs or processes the incoming data

Communication

The Arduino and the Python HMI communicate via a serial link (e.g., USB virtual COM port). Data is structured in a simple format such as CSV, JSON, or newline-delimited strings.

🔧 Leak Test HMI

A Python-based Human-Machine Interface (HMI) for monitoring and analyzing pressure data from an Arduino device via serial communication.

📌 Description

This application:

Plots real-time pressure readings from an Arduino
Allows setting test criteria (start/end pressure and time window)
Performs leak test analysis
Saves results, raw data, and screenshots

🖼️ Features

Live Pressure Plotting using PyQt6 and pyqtgraph
Automatic Arduino Detection (via USB serial)
Setpoint Configuration (start/end thresholds)
Test Window Cursors to select analysis interval (dT)
Automated Analysis with pass/fail result based on drop rate
Marker Sampling at regular time intervals
Data Export (CSV summary + detailed data)
Screenshot Capture upon analysis

🧪 UI Controls

Control	Description
Setpoint Start [kPa]	Target pressure before leak
Setpoint End [kPa]	Minimum pressure after test
dT [sec]	Duration between cursors for analysis
Analyze	Executes analysis, saves data & screenshot
Stack No	Test or batch identifier
Comments	Notes saved with test
Sample Time [sec]	Frequency of vertical markers
Test Result	Displays PASS/FAIL with drop rate

💾 Output Files

leak_test_summary.csv: Summary of test results
leak_test_data_ST<stack>_YYYY-MM-DD_HH-MM-SS.csv: Marker-sampled pressure data
screenshot_<same_as_csv>.png: Screenshot of graph + UI

📦 Requirements

Install dependencies with:

pip install pyqt6 pyqtgraph pandas pyserial

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