ReadSerial.py

import serial
import csv
from datetime import datetime

SERIAL_PORT = 'COM5'
BAUD_RATE = 9600
date_str = datetime.now().strftime("%Y%m%d_%H%M%S")
CSV_FILE = f"data/data_log_{date_str}.csv"

header = ['Timestamp', 'Humidity', 'Pressure', 'Temperature1H', 'Temperature2B', 'Difference', 'Average']

arduino = serial.Serial(SERIAL_PORT, BAUD_RATE)

with open(CSV_FILE, mode='a', newline='') as file:
    writer = csv.writer(file)

    # Write header if file is empty
    if file.tell() == 0:
        writer.writerow(header)

    print(f"Listening on {SERIAL_PORT}... Press Ctrl+C to stop.")
    try:
        while True:
            line = arduino.readline().decode('utf-8').strip()
            if line:
                parts = line.split(',')  # Split CSV line into columns
                timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
                temp1H = float(parts[2])
                temp2B = float(parts[3])
                diff = round(temp1H - temp2B, 2)
                avg = round((temp1H + temp2B) / 2, 2)
                parts.append(diff)
                parts.append(avg)
                writer.writerow([timestamp] + parts)
                file.flush()
                print(f"{timestamp} | Humidity: {parts[0]}%, Pressure: {parts[1]}kPa, Temp1H: {parts[2]}°C, Temp2B: {parts[3]}°C, Diff: {parts[4]}, Avg: {parts[5]}")
    except KeyboardInterrupt:
        print("\nStopped by user.")
    finally:
        arduino.close()
        print("Serial connection closed.")