12 from sqlalchemy import create_engine
14 import MySQLdb.cursors
16 logging.basicConfig(format='%(levelname)s: %(message)s', level=logging.INFO)
18 #May 27 21:32 /sys/bus/w1/devices/28-0416a1bab9ff
19 #May 27 21:33 /sys/bus/w1/devices/28-0416a1ac66ff
20 #May 27 21:35 /sys/bus/w1/devices/28-0516a207a4ff
21 #May 27 21:38 /sys/bus/w1/devices/28-0316a2193bff
22 #May 27 21:38 /sys/bus/w1/devices/28-0316a21383ff
25 # einen Sensor auslesen
28 class ReadsensorError(RuntimeError):
32 def readsensor(sensor_id):
33 sensorfile = "/sys/bus/w1/devices/28-{}/w1_slave".format(sensor_id)
34 file = open(sensorfile)
37 # 64 01 4b 46 7f ff 0c 10 01 : crc=01 YES
38 # 64 01 4b 46 7f ff 0c 10 01 t=22250
41 linecrc = file.readline()
42 match = re.search(": crc=[0-9a-f]{2} (YES|NO)",linecrc)
44 yesno = match.group(1)
46 raise ReadsensorError('Could not evaluate sensorfile "{}"'.format(sensorfile))
49 linetemp = file.readline()
50 match = re.search(" t=([-0-9]+)",linetemp)
52 temp_raw = match.group(1)
53 temp = float(temp_raw)/1000
56 jetzt = datetime.datetime.now()
58 return jetzt, temp_raw, temp
60 def read_buggy_sensor(sensor_id):
62 jetzt, temp_raw, temp = readsensor(sensor_id)
64 return jetzt, temp_raw, temp
66 raise ReadsensorError('Zu hoch')
68 def writesensordatacsv(config, sensor_id, sensor_name, timestamp, value_type, value_raw, value):
69 # Schreiben des csv-files
70 with open(os.path.expanduser(config.get("csv", "filename")), "a", newline = "") as file:
71 writer = csv.writer(file, dialect = "excel")
72 writer.writerow([timestamp.strftime("%Y-%m-%d %H:%M"), sensor_id, sensor_name, "{:.1f}".format(value)])
75 def readcsvfile(csvfile):
76 with open(csvfile, "r", newline="") as file:
77 yield from csv.DictReader(file, dialect = "excel", fieldnames=("timestamp", "sensor_id", "sensor_name", "value"))
80 def writesensordatadb(config, sensor_id, sensor_name, timestamp, value_type, value_raw, value):
81 # Schreiben des db-files
82 user = config.get('database', 'user')
83 pwd = config.get('database','password')
84 host = config.get('database','hostname')
85 db = config.get('database','database')
87 engine = create_engine('mysql+mysqldb://{}:{}@{}/{}'.format(user, pwd, host, db), echo=False)
88 conn = engine.connect()
89 with warnings.catch_warnings():
90 # ignore _mysql_exceptions.Warning: Duplicate entry '0316a2193bff-2018-08-29 14:30:00' for key 'sensorid_timestamp'
91 warnings.simplefilter("ignore", category=MySQLdb.cursors.Warning)
93 logging.info("Writing to database: sensor_id={}, sensor_name={}, value_type={}, value_raw={}, value={}, timestamp={}".format(sensor_id, sensor_name, value_type, value_raw, value, timestamp))
94 conn.execute("insert ignore into sensors (sensor_id, sensor_name, value_type, value_raw, value, timestamp) values (%s,%s,%s,%s,%s,%s)", sensor_id, sensor_name, value_type, value_raw, value, timestamp)
98 def process_csv_file(config, fromcsvfile, value_type, sensors):
99 # "timestamp", "sensor_id", "sensor_name", "value"
100 sensors_ids = [sensor_id for sensor_id, sensor_name in sensors]
101 for record in readcsvfile(fromcsvfile):
102 timestamp, sensor_id, sensor_name, value = (record["timestamp"], record["sensor_id"], record["sensor_name"], float(record["value"]))
103 if sensor_id in sensors_ids:
105 writesensordatadb(config, sensor_id, sensor_name, timestamp, value_type, value_raw, value)
108 def main(configfile, fromcsvfile):
109 config = configparser.ConfigParser()
110 config.read(configfile)
111 sensors = config.items('temperature')
112 value_type = "Wassertemperatur"
115 process_csv_file(config, fromcsvfile, value_type, sensors)
118 for sensor_id, sensor_name in sensors:
119 timestamp, value_raw, value = read_buggy_sensor(sensor_id)
120 writesensordatacsv(config, sensor_id, sensor_name, timestamp, value_type, value_raw, value)
121 writesensordatadb(config, sensor_id, sensor_name, timestamp, value_type, value_raw, value)
123 logging.info('Sensor {}: {:.1f}°C'.format(sensor_id, value))
126 if __name__ == '__main__':
127 default_config_file = os.path.expanduser('~/seewasser.ini')
128 parser = argparse.ArgumentParser(description='Read sensor data')
129 parser.add_argument('--config', default=default_config_file, help='configuration file')
130 parser.add_argument('--fromcsvfile', help='write values from csv file to database')
131 parser.add_argument("--verbose", help='write some output', action='store_true')
132 args = parser.parse_args()
133 main(args.config, args.fromcsvfile)