Raspberry katilines monitoringas

Script

#!/usr/bin/python
# (c) 2019 justinas@eofnet.lt
import os
import time
import argparse as ap
from rrdtool import update as rrd_update
import rrdtool

sensorsdb = '/etc/mods/sensors.rrd'
sensors = [{"hwid":"28-03049779621c", "ds":"sensor1", "name":"1 sensorius", "color":"#ff0000"},
              {"hwid":"28-03049779691d", "ds":"sensor2", "name":"2 sensorius", "color":"#0000ff"},
              {"hwid":"28-03049779b25b", "ds":"sensor3", "name":"3 sensorius", "color":"#3cb371"},
              {"hwid":"28-03049779d1ab", "ds":"sensor4", "name":"4 sensorius", "color":"#6a5acd"}]

 
os.system('modprobe w1-gpio')
os.system('modprobe w1-therm')
 
def read_temp_raw(dev):
    f = open("/sys/bus/w1/devices/"+dev+"/w1_slave",'r')
    lines = f.readlines()
    f.close()
    while lines[0].strip()[-3:] != 'YES':
        time.sleep(0.2)
        lines = read_temp_raw()
    equals_pos = lines[1].find('t=')
    if equals_pos != -1:
        temp_string = lines[1][equals_pos+2:]
        temp_c = round((float(temp_string) / 1000.0),2)
        return str(temp_c)

def GenDefs():
  defs = []
  for sensor in sensors:
    defs.append("DEF:"+sensor["ds"]+"="+sensorsdb+":"+sensor["ds"]+":AVERAGE")
  return defs

def GenLines():
  lines = []
  count = 1
  for sensor in sensors:
    lines.append("LINE"+str(count)+":"+sensor["ds"]+sensor["color"]+":"+sensor["name"])
    lines.append("GPRINT:"+sensor["ds"]+":LAST:Last\:%8.2lf %s")
    lines.append("GPRINT:"+sensor["ds"]+":MIN:Min\:%8.2lf %s")
    lines.append("GPRINT:"+sensor["ds"]+":AVERAGE:Average\:%8.2lf %s")
    lines.append("GPRINT:"+sensor["ds"]+":MAX:Max\:%8.2lf %s\\n")
    count += 1
  return lines

def ReadAllSensors():
   for sensor in sensors:
        temp = str(read_temp_raw(sensor["hwid"]))
        print "Sensor: "+str(sensor["name"])+" temp: "+temp+"C"

def Update():
    print "Updating..."
    template = "N"
    for sensor in sensors:
      tempc = read_temp_raw(sensor["hwid"])
      template = template + ":"+tempc
    ret = rrd_update(sensorsdb, template)
    if ret:
      print rrdtool.error()


def Graph():
 print "Graphing..."
 for sched in ['daily' , 'weekly', 'monthly', 'yearly']:
    if sched == 'weekly':
        period = 'w'
    elif sched == 'daily':
        period = 'd'
    elif sched == 'monthly':
        period = 'm'
    elif  sched == 'yearly':
        period = 'y'
    ret = rrdtool.graph( "/var/www/html/temp-%s.png" %(sched), "--start", "-1%s" %(period), "--vertical-label=Temperatura",
         '--watermark=Temperatures of the heating system',
         "-w 1000 -h 600",
         GenDefs(), GenLines())

parser = ap.ArgumentParser(description="Show temperature sensors readings or make cool graphs :)")
parser.add_argument('--graph', help='Write cool graph',action='store_true')
parser.add_argument('--update', help='Update RRD database',action='store_true')
args = parser.parse_args()
if args.graph is True:
 Graph()
elif args.update is True:
 Update()
else:
 ReadAllSensors()

Cron

* * * * * root /root/temp/read_multiple.py --update > /dev/null 2>&1
*/5  * * * * root /root/temp/read_multiple.py --graph > /dev/null 2>&1