temperatury.service

[Unit]
Description=hey

[Service]
Type=oneshot
ExecStart=/home/mf/temperatury.sh
User=mf

temperatury.sh

#!/bin/sh
read temp < /sys/class/thermal/thermal_zone0/temp
rrdtool update /home/mf/temperatury.rrd N:$temp
#perl -e 'sleep 10 - time % 10'

temperatury.timer

[Unit]
Description=hey run temperatury

[Timer]
OnBootSec=10
OnUnitActiveSec=3

[Install]
WantedBy=timers.target

tempergraph.py

import rrdtool

for shed in ['minutely', 'daily', 'weekly', 'hourly']:
    if shed=='weekly':
        period = '1w'
    elif shed=='daily':
        period = '1d'
    elif shed=='monthly':
        period='1m'
    elif shed=="hourly":
        period="6000"
    elif shed=='minutely':
        period='1800'
    ret=rrdtool.graph("/srv/http/temp-%s.png" %(shed), "--start", "-%s" %(period),
			"-S 20",
                      "-w 1000",
                      "-h 800",
                      "DEF:tempa=/home/mf/temperatury.rrd:temp:AVERAGE",
                      "DEF:tempi=/home/mf/temperatury.rrd:temp:MIN",
                      "DEF:tempx=/home/mf/temperatury.rrd:temp:MAX",
                      "LINE1:tempa#aaaa00:tempa\r",
                      "LINE2:tempi#0000ff:tempi\r",
                      "LINE3:tempx#ff0000:tempx\r"
    )

tempergraph.service

[Unit]
Description=hey

[Service]
Type=oneshot
ExecStart=/usr/bin/python2 /home/mf/tempergraph.py
User=root
Group=wheel

tempergraph.timer

[Unit]
Description=hey run temperatury

[Timer]
OnBootSec=60
OnUnitActiveSec=120

[Install]
WantedBy=timers.target

temperinit.txt

 mf  ~  rrdtool create temperatury.rrd \
> --start 1486804613 \
> --step 10 \
> DS:temp:GAUGE:60:120:200000 \
> RRA:AVERAGE:0.1:1:180 \
> RRA:AVERAGE:0.1:12:90 \
> RRA:AVERAGE:0.1:60:60 \
> RRA:AVERAGE:0.001:120:10000