72 lines
2.4 KiB
Python
72 lines
2.4 KiB
Python
'''
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____ ___ _ _ _ _ ____
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/ ___| / _ \| | | | \ | | _ \
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\___ \| | | | | | | \| | | | |
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___) | |_| | |_| | |\ | |_| |
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|____/ \___/ \___/|_| \_|____/
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python3 /var/www/nebuleair_pro_4g/sound_meter/get_data.py
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Script to get data from the NSRT_MK4 Sound Level Meter
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triggered by a systemd service
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sudo systemctl status nebuleair-noise-data.service
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Need to install "nsrt_mk3_dev"
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1.Intervalle d'enregistrement
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L'intervalle d'enregistrement définit le temps entre deux points successifs enregistrés.
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Cela définit également la période d'intégration pour le LEQ, et la période d'observation pour L-min et L-max et Lpeak.
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L'intervalle d'enregistrement peut être réglé de 125 ms (1/8ème) à 2 H par incréments de 125 ms.
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some parameters can be changed:
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write_tau(tau: float) -> time constant
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write_fs(frequency: int) -> sampling freq
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'''
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import nsrt_mk3_dev
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import sqlite3
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nsrt = nsrt_mk3_dev.NsrtMk3Dev('/dev/ttyACM0')
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# Connect to the SQLite database
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conn = sqlite3.connect("/var/www/nebuleair_pro_4g/sqlite/sensors.db")
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cursor = conn.cursor()
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#GET RTC TIME from SQlite
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cursor.execute("SELECT * FROM timestamp_table LIMIT 1")
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row = cursor.fetchone() # Get the first (and only) row
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rtc_time_str = row[1] # '2025-02-07 12:30:45'
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freq_level = nsrt.read_fs() #current sampling frequency
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time_constant = nsrt.read_tau() #reads the current time constant
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leq_level = nsrt.read_leq() #current running LEQ and starts the integration of a new LEQ.
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weighting = nsrt.read_weighting() #weighting curve that is currently selected
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weighted_level = nsrt.read_level() #current running level in dB.
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#print(f'current sampling freq : {freq_level} Hz')
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#print(f'current time constant : {time_constant} s')
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#print(f'current LEQ level: {leq_level:0.2f} dB')
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#print(f'{weighting} value: {weighted_level:0.2f} dBA')
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# Round values to 2 decimal places before saving
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leq_level_rounded = round(leq_level, 2)
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weighted_level_rounded = round(weighted_level, 2)
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#save to db
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#save to sqlite database
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try:
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cursor.execute('''
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INSERT INTO data_NOISE (timestamp,current_LEQ, DB_A_value) VALUES (?,?,?)'''
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, (rtc_time_str,leq_level_rounded,weighted_level_rounded))
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# Commit and close the connection
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conn.commit()
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#print("Sensor data saved successfully!")
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except Exception as e:
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print(f"Database error: {e}")
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conn.close() |