239bdfea69
Table data_S88, flag config S88 + port configurable S88_port (default /dev/ttyAMA5), service/timer systemd 10s, carte sensors.html, endpoint launcher.php, toggle admin.html. read_co2() est un stub NotImplementedError en attente du datasheet. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
73 lines
1.9 KiB
Python
73 lines
1.9 KiB
Python
'''
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Live read of the Senseair S88 CO2 sensor (used by the web "Get Data" button).
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Prints a JSON object: {"CO2": <int_ppm>} or {"error": "<message>"}.
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Usage: /usr/bin/python3 /var/www/nebuleair_pro_4g/S88/get_data.py [port]
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If no port is given, the script reads S88_port from config_table.
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'''
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import json
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import sqlite3
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import sys
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import serial
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DB_PATH = "/var/www/nebuleair_pro_4g/sqlite/sensors.db"
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DEFAULT_PORT = "/dev/ttyAMA5"
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BAUDRATE = 9600
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def get_port_from_config():
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try:
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conn = sqlite3.connect(DB_PATH)
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cursor = conn.cursor()
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cursor.execute("SELECT value FROM config_table WHERE key = ?", ("S88_port",))
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row = cursor.fetchone()
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conn.close()
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return row[0] if row else DEFAULT_PORT
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except Exception:
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return DEFAULT_PORT
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def read_co2(ser):
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# TODO: implement the Senseair S88 read protocol once the datasheet is provided.
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# Expected return: integer CO2 concentration in ppm, or None on failure.
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raise NotImplementedError("Senseair S88 read protocol not implemented yet")
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def main():
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port = sys.argv[1] if len(sys.argv) > 1 else get_port_from_config()
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try:
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ser = serial.Serial(
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port=port,
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baudrate=BAUDRATE,
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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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except Exception as e:
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print(json.dumps({"error": f"Cannot open {port}: {e}"}))
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return
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try:
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co2 = read_co2(ser)
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if co2 is None:
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print(json.dumps({"error": "No data from S88"}))
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return
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print(json.dumps({"CO2": int(round(co2))}))
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except NotImplementedError as e:
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print(json.dumps({"error": str(e)}))
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except Exception as e:
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print(json.dumps({"error": f"S88 read error: {e}"}))
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finally:
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try:
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ser.close()
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except Exception:
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pass
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if __name__ == "__main__":
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main()
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