Python • Re: Arduino-Pi Weather Station issue

Code:

import serialimport mariadbimport jsonimport sys# Establish connection to MariaDBdef connect_to_db():    try:        conn = mariadb.connect(            user="your_username",            password="your_password",            host="127.0.0.1",            port=3306,            database="your_database"        )        return conn    except mariadb.Error as e:        print(f"Error connecting to MariaDB: {e}")        sys.exit(1)# Insert data into the databasedef insert_data(cursor, data):    try:        # Prepare the query dynamically based on the fields in the JSON        fields = ", ".join(data.keys())        placeholders = ", ".join(["?"] * len(data))        query = f"INSERT INTO weather_data ({fields}) VALUES ({placeholders})"        cursor.execute(query, list(data.values()))    except mariadb.Error as e:        print(f"Error inserting data into MariaDB: {e}")# Read and process data from the serial portdef read_from_serial(serial_port):    try:        line = serial_port.readline().decode('utf-8').strip()        print(f"Received message: {line}")  # Print all incoming messages                # Attempt to parse the line as JSON        try:            data = json.loads(line)            return data        except json.JSONDecodeError:            print("Non-JSON message received.")            return None    except UnicodeDecodeError as e:        print(f"Error decoding serial input: {e}")        return Nonedef main():    # Configure the serial port    serial_port = serial.Serial('/dev/ttyACM0', 9600, timeout=1)        # Connect to the database    conn = connect_to_db()    cursor = conn.cursor()    print("Listening for data...")    while True:        # Read and process data from the serial port        data = read_from_serial(serial_port)        if data:            # Insert valid JSON data into the database            insert_data(cursor, data)            conn.commit()            print(f"Data inserted into database: {data}")    # Close the connection when exiting    conn.close()if __name__ == "__main__":    main()