198836fa13
- Scripts MH-Z19/get_data.py (lecture standalone) et write_data.py (écriture SQLite) - Table data_MHZ19, config MHZ19, cleanup et service systemd (120s) - Web UI : carte test sensors, checkbox admin, boutons database + CSV download - SARA_send_data_v2.py non modifié (sera fait dans un second temps) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
59 lines
1.2 KiB
Python
59 lines
1.2 KiB
Python
'''
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Script to get CO2 values from MH-Z19 sensor
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need parameter: CO2_port
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/usr/bin/python3 /var/www/nebuleair_pro_4g/MH-Z19/get_data.py ttyAMA4
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'''
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import serial
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import json
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import sys
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import time
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parameter = sys.argv[1:]
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port = '/dev/' + parameter[0]
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ser = serial.Serial(
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port=port,
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baudrate=9600,
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parity=serial.PARITY_NONE,
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stopbits=serial.STOPBITS_ONE,
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bytesize=serial.EIGHTBITS,
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timeout=1
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)
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READ_CO2_COMMAND = b'\xFF\x01\x86\x00\x00\x00\x00\x00\x79'
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def read_co2():
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ser.write(READ_CO2_COMMAND)
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time.sleep(2)
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response = ser.read(9)
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if len(response) < 9:
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print("Error: No data or incomplete data received.")
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return None
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if response[0] == 0xFF:
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co2_concentration = response[2] * 256 + response[3]
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return co2_concentration
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else:
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print("Error reading data from sensor.")
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return None
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def main():
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try:
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co2 = read_co2()
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if co2 is not None:
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data = {"CO2": co2}
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json_data = json.dumps(data)
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print(json_data)
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else:
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print("Failed to get CO2 data.")
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except KeyboardInterrupt:
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print("Program terminated.")
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finally:
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ser.close()
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if __name__ == '__main__':
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main()
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