4f3d273981
Nouveau capteur de qualité d'air CCS811 sur le bus I2C, calqué sur le pattern S88 (local-only, pas encore dans le payload de transmission). - CCS811/get_data.py (lecture live) + write_data.py (timer 10s, self-heal table) - table data_CCS811 (timestamp, eCO2, TVOC) dans create_db.py - config CCS811 (bool) + CCS811_address (0x5A/0x5B, défaut 0x5A) dans set_config.py - service+timer systemd nebuleair-ccs811-data (10s) + ajout boucle d'activation - admin.html: case d'activation + dropdown adresse I2C - sensors.html: carte Get Data (TVOC + eCO2) - database.html + launcher.php: consultation/export/stats data_CCS811 - lib adafruit-circuitpython-ccs811 dans installation_part1.sh - CCS811/README.md: câblage, adresses, warning clock-stretching I2C sur Pi - CLAUDE.md + changelog mis à jour Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
99 lines
2.7 KiB
Python
99 lines
2.7 KiB
Python
'''
|
|
Script to get air-quality values from the AMS CCS811 sensor and write to database.
|
|
/usr/bin/python3 /var/www/nebuleair_pro_4g/CCS811/write_data.py
|
|
|
|
CCS811 is a MOX gas sensor: eCO2 (equivalent CO2 in ppm, derived from VOCs) and
|
|
TVOC (Total VOC in ppb). TVOC is the primary measurement of interest.
|
|
|
|
I2C, library adafruit-circuitpython-ccs811. Address from config_table
|
|
(key CCS811_address, e.g. "0x5A" / "0x5B"), default 0x5A.
|
|
'''
|
|
|
|
import sqlite3
|
|
import sys
|
|
import time
|
|
|
|
DB_PATH = "/var/www/nebuleair_pro_4g/sqlite/sensors.db"
|
|
DEFAULT_ADDRESS = 0x5A
|
|
DATA_READY_RETRIES = 30
|
|
DATA_READY_DELAY = 0.2 # seconds
|
|
|
|
|
|
def get_config(cursor, key, default):
|
|
cursor.execute("SELECT value FROM config_table WHERE key = ?", (key,))
|
|
row = cursor.fetchone()
|
|
return row[0] if row else default
|
|
|
|
|
|
def main():
|
|
conn = sqlite3.connect(DB_PATH)
|
|
cursor = conn.cursor()
|
|
|
|
# Self-heal: ensure the table exists even if create_db.py was skipped during OTA.
|
|
# Duplicates the canonical schema from sqlite/create_db.py — keep them in sync.
|
|
cursor.execute("""
|
|
CREATE TABLE IF NOT EXISTS data_CCS811 (
|
|
timestamp TEXT,
|
|
eCO2 INTEGER,
|
|
TVOC INTEGER
|
|
)
|
|
""")
|
|
conn.commit()
|
|
|
|
addr_str = get_config(cursor, "CCS811_address", "0x5A")
|
|
try:
|
|
address = int(str(addr_str), 16)
|
|
except ValueError:
|
|
address = DEFAULT_ADDRESS
|
|
|
|
try:
|
|
import board
|
|
import busio
|
|
import adafruit_ccs811
|
|
except Exception as e:
|
|
print(f"CCS811: library import failed: {e}")
|
|
conn.close()
|
|
sys.exit(1)
|
|
|
|
try:
|
|
i2c = busio.I2C(board.SCL, board.SDA)
|
|
ccs811 = adafruit_ccs811.CCS811(i2c, address=address)
|
|
except Exception as e:
|
|
print(f"CCS811: cannot init at {hex(address)}: {e}")
|
|
conn.close()
|
|
sys.exit(1)
|
|
|
|
try:
|
|
ready = False
|
|
for _ in range(DATA_READY_RETRIES):
|
|
if ccs811.data_ready:
|
|
ready = True
|
|
break
|
|
time.sleep(DATA_READY_DELAY)
|
|
|
|
if not ready:
|
|
print("CCS811: data not ready (warming up?), skipping.")
|
|
return
|
|
|
|
eco2 = int(ccs811.eco2)
|
|
tvoc = int(ccs811.tvoc)
|
|
|
|
cursor.execute("SELECT last_updated FROM timestamp_table LIMIT 1")
|
|
row = cursor.fetchone()
|
|
rtc_time_str = row[0]
|
|
|
|
cursor.execute(
|
|
"INSERT INTO data_CCS811 (timestamp, eCO2, TVOC) VALUES (?, ?, ?)",
|
|
(rtc_time_str, eco2, tvoc),
|
|
)
|
|
conn.commit()
|
|
print(f"eCO2: {eco2} ppm, TVOC: {tvoc} ppb (saved at {rtc_time_str})")
|
|
except Exception as e:
|
|
print(f"CCS811 error: {e}")
|
|
finally:
|
|
conn.close()
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|