#! /usr/bin/python3

import datetime
import re
import sys
import csv
import os

#May 27 21:32 /sys/bus/w1/devices/28-0416a1bab9ff
#May 27 21:33 /sys/bus/w1/devices/28-0416a1ac66ff
#May 27 21:35 /sys/bus/w1/devices/28-0516a207a4ff
#May 27 21:38 /sys/bus/w1/devices/28-0316a2193bff
#May 27 21:38 /sys/bus/w1/devices/28-0316a21383ff

# Eine Funktion:
# einen Sensor auslesen
#/sys/bus/w1/devices/

def readsensor(sensorID):
    sensorfile = "/sys/bus/w1/devices/28-{}/w1_slave".format(sensorID)
    file = open(sensorfile)

    # Inhalt des Sensors:
    # 64 01 4b 46 7f ff 0c 10 01 : crc=01 YES
    # 64 01 4b 46 7f ff 0c 10 01 t=22250

    # Suche nach YES
    linecrc = file.readline()
    match = re.search(": crc=[0-9a-f]{2} (YES|NO)",linecrc)

    yesno = match.group(1)
    if yesno != "YES":
        return None
        
    # Temperatur raus
    linetemp = file.readline()
    match = re.search(" t=([-0-9]+)",linetemp)

    temp = match.group(1)
    temp = float(temp)/1000

    file.close()

    jetzt = datetime.datetime.now()
    # print(jetzt)

    # Schreiben des csv-files
    file2 = open("badesaison.csv", "a", newline = "")
    writer = csv.writer(file2, dialect = "excel")
    writer.writerow([jetzt.strftime("%Y-%m-%d %H:%M"), sensorID, "{:.1f}".format(temp)])

    file2.close()

    # Nur für die Ausgabe wird gerundet
    return temp
    
sensoren = ["0416a1bab9ff","0416a1ac66ff","0516a207a4ff","0316a2193bff","0316a21383ff"]

error = False

for sensorID in sensoren:
    temp = readsensor(sensorID)
    if temp is None:
        print("Fehler bei Sensor{}".format(sensorID))
        error = True
    else:
        print('Sensor {}: {:.1f}°C'.format(sensorID,temp))

sys.exit(1 if error else 0)