Raspberry temp rrd

Šiame straipsnyje jau naudojamas paruoštas dht22 sensorius.

Pasidarome RRD

rrdtool create /etc/mods/temp.rrd --step 60 \
DS:temperature:GAUGE:120:-50:100 \
DS:humidity:GAUGE:120:0:100 \
DS:rasptemp:GAUGE:120:0:100 \
RRA:AVERAGE:0.5:1:1440 \
RRA:MIN:0.5:1:1440 \
RRA:MAX:0.5:1:1440 \
RRA:AVERAGE:0.5:30:17520 \
RRA:MIN:0.5:30:17520 \
RRA:MAX:0.5:30:17520 \
RRA:AVERAGE:0.5:1:1440 \
RRA:MIN:0.5:1:1440 \
RRA:MAX:0.5:1:1440

RRD Atnaujinimas (RaspberryPI)

Sujungimas:

PIN1 = +
PIN6 = -
PIN7 = DATA

Sudiegiame reikalingas bibliotekas:

apt-get install build-essential python-dev python-openssl git
git clone https://github.com/adafruit/Adafruit_Python_DHT.git && cd Adafruit_Python_DHT
python setup.py install

Sudedame si scripta i /usr/local/bin/readtemp.py

#!/usr/bin/env python2.7
# apt install python-rrdtool python-dill
import Adafruit_DHT
import time
import argparse as ap
from rrdtool import update as rrd_update
import rrdtool
import dill

sensor = Adafruit_DHT.DHT22
pin = 4
humidity, temperature = Adafruit_DHT.read_retry(sensor, pin)
if humidity is None and temperature is None:
 dill.load_session("/tmp/tempout")

def DHT22_print_data():
    if humidity is not None and temperature is not None:
       if args.update is not None:
          rrd_update('/etc/mods/temp.rrd', 'N:%s:%s:%s' %(temperature, humidity, rasp_temp()))
       else:
        print 'Temp: {0:0.1f}C, Dregme: {1:0.1f}%'.format(temperature, humidity)
    else:
        print('Failed to get reading. Try again!')
        sys.exit(1)

def rasp_temp():
        tFile = open('/sys/class/thermal/thermal_zone0/temp')
        temp = round((float(tFile.read())/1000),2)
        return temp

def MakeNiceGraph():
   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=Vidaus temperatura - Veranda',
         "-w 800 -h 400",
         "DEF:temperature=/etc/mods/temp.rrd:temperature:AVERAGE",
         "DEF:humidity=/etc/mods/temp.rrd:humidity:AVERAGE",
         "DEF:rasptemp=/etc/mods/temp.rrd:rasptemp:AVERAGE",
         "AREA:temperature#EA450C:Temperatura",
         "GPRINT:temperature:LAST:Dabar\:%8.2lf %s",
         "GPRINT:temperature:MIN:Min\:%8.2lf %s",
         "GPRINT:temperature:AVERAGE:Vidurkis\:%8.2lf %s",
         "GPRINT:temperature:MAX:Max\:%8.2lf %s\\n",
         "LINE1:humidity#19803C:Dregme",
         "GPRINT:humidity:LAST:     Dabar\:%8.2lf %s",
         "GPRINT:humidity:MIN:Min\:%8.2lf %s",
         "GPRINT:humidity:AVERAGE:Vidurkis\:%8.2lf %s",
         "GPRINT:humidity:MAX:Max\:%8.2lf %s\\n",
         "LINE2:rasptemp#FA4BBD:CPU",
         "GPRINT:rasptemp:LAST:        Dabar\:%8.2lf %s",
         "GPRINT:rasptemp:MIN:Min\:%8.2lf %s",
         "GPRINT:rasptemp:AVERAGE:Vidurkis\:%8.2lf %s",
         "GPRINT:rasptemp:MAX:Max\:%8.2lf %s\\n")


parser = ap.ArgumentParser(description="Just another script")
parser.add_argument("--graph")
parser.add_argument("--update")
args, leftovers = parser.parse_known_args()
if args.graph is not None:
 MakeNiceGraph()
else:
 DHT22_print_data()
 dill.dump_session("/tmp/tempout")

RRD Atnaujinimas (OrangePI)

#!/usr/bin/env python2.7
# apt install python-rrdtool

from pyA20.gpio import gpio
from pyA20.gpio import port

import dht22 as dht
import time
import argparse as ap
from rrdtool import update as rrd_update
import rrdtool

# initialize GPIO
DHT22_PIN = port.PA6
gpio.init()
#gpio.cleanup()

DHT22_instance = dht.DHT22(pin=DHT22_PIN)

def DHT22_print_data(DHT22_result):
    if DHT22_result.is_valid():
       if args.update is not None:
          rrd_update('/etc/mods/temp.rrd', 'N:%s:%s' %(DHT22_result.temperature, DHT22_result.humidity))
       else:
        print 'Temp: {}C, Dregme: {}%'.format(DHT22_result.temperature, DHT22_result.humidity)
    else:
        DHT22_read_sensor()

def DHT22_read_sensor():
    DHT22_result = DHT22_instance.read()
    DHT22_print_data(DHT22_result)

def MakeNiceGraph():
   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=Vidaus temperatura - Svetaine',
         "-w 800 -h 400",
         "DEF:temperature=/etc/mods/temp.rrd:temperature:AVERAGE",
         "DEF:humidity=/etc/mods/temp.rrd:humidity:AVERAGE",
         "AREA:temperature#EA450C:Temperatura",
         "GPRINT:temperature:LAST:Dabar\:%8.2lf %s",
         "GPRINT:temperature:AVERAGE:Vidurkis\:%8.2lf %s",
         "GPRINT:temperature:MAX:Max\:%8.2lf %s\\n",
         "LINE1:humidity#19803C:Dregme",
         "GPRINT:humidity:LAST:     Dabar\:%8.2lf %s",
         "GPRINT:humidity:AVERAGE:Vidurkis\:%8.2lf %s",
         "GPRINT:humidity:MAX:Max\:%8.2lf %s\\n") 
       

parser = ap.ArgumentParser(description="Just another script")
parser.add_argument("--graph")
parser.add_argument("--update")
args, leftovers = parser.parse_known_args()
if args.graph is not None:
 MakeNiceGraph()
else:
 DHT22_read_sensor()

Crontab:

* * * * * root /usr/local/bin/readtemp.py --update RRD > /dev/null 2>&1

RRD paveikslėlio atvaizdavimas

Crontab:

*/5  * * * * root /usr/local/bin/readtemp.py --graph RRD > /dev/null 2>&1