\dev\null 20:03, 13 birželio 2019

2019-06-13T20:03:55Z

Naujas puslapis

== RasperryPI/OrangePI temp ==

[[Vaizdas:Screenshot 2019-06-13 at 18.37.39.png]]

<syntaxhighlight lang="python">
#!/usr/bin/python
import os
import time

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

print(measure_temp())
</syntaxhighlight>

Sudedam į '''/usr/local/bin/cpu_temp.py'''
chmod +x /usr/local/bin/cpu_temp.py

== CPU Temp tinklo resursas ==

[[Vaizdas:Screenshot 2019-06-13 at 23.01.00.png|800px]]

Užkūrus šį resursą ant įvairių įrenginių [[RaspberryPI]], [[OrangePI]] ir t.t. Galima kreipiantis į http REST API, pasiimt informaciją apie įrenginį, kol kas jis atiduoda tik temperatūrą. Bet ateityje galima pridėti daugiau įvairių dalykų. Taip atiduodamą informaciją nesunkiai galima panaudoti tinklo monitoringo sistemose pvz.: braižyti grafikus, arba tikrinti ir raportuoti apie tam tikras problemas jeigu gautas rezultatas neatitinka nustatyto.
<syntaxhighlight lang="python">
#!/usr/bin/python2.7
# HW Reporting REST API
# (c) 2018-2019 justinas@eofnet.lt
# INSTALL: apt-get install python-pip; pip install python-daemon bottle
import sys, os
from time import sleep
import argparse
import daemon
import logging
import subprocess
import json
import re
from bottle import run, post, request, response, get, route

if not os.getegid() == 0:
sys.exit('Script must be run as root')

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

def daemonize():
print ("Daemonizing..")
@route('/temp')
def returntemp():
temp = measure_temp()
respond = { "answer": temp }
return json.dumps(respond)
run(host='0.0.0.0', port=1414, debug=False)

if __name__ == "__main__":
parser = argparse.ArgumentParser(description='HW info REST API (c) 2019 justinas@eofnet.lt, EOFNET LAB10',
formatter_class=argparse.ArgumentDefaultsHelpFormatter)
parser.add_argument('--temp', action='store_true')
parser.add_argument('--daemonize',action='store_true')
args = parser.parse_args()
try:
if args.temp:
print measure_temp()
elif args.daemonize:
daemonize()
else:
print "No arguments specified"
except KeyboardInterrupt:
pass
</syntaxhighlight>

'''hw_info.service'''
<syntaxhighlight lang="sh">
[Unit]
Description=Power Switch Relay Network Service
After=network.target

[Service]
Type=simple
ExecStart=/usr/local/bin/hw_info.py --daemonize

[Install]
WantedBy=multi-user.target
</syntaxhighlight>
Įdedam šį servisą į '''/etc/systemd/system''' ir įjungiam
systemctl enable hw_info
systemctl start hw_info

== RRD Temperatūrų grafikai keliems įrenginiams ==

Sugalvota užduotis, monitorinti kelių Raspberių ir Orange'ų temperatūras centriniame serveryje. Turime šiuos įrenginius:
# lokalus serveris 127.0.0.1 # monitorinsime [[lm sensors monitoring|taip]].
# relayswitch 192.168.254.102
# cam1 192.168.254.101
# cam4 192.168.254.104
# cam5 192.168.254.105
# rpitv 192.168.254.9

=== Įdiegiame mums reikalingus įrankius ===

apt-get install rrdtool python2.7 python-requests python-rrdtool

=== Sukuriame RRD ===

rrdtool create /etc/mods/devices_temp.rrd --step 60 \
DS:server:GAUGE:120:0:100 \
DS:relay:GAUGE:120:0:100 \
DS:cam1:GAUGE:120:0:100 \
DS:cam4:GAUGE:120:0:100 \
DS:cam5:GAUGE:120:0:100 \
DS:rpitv:GAUGE:120:0:100 \
RRA:AVERAGE:0.5:1:1440 \
RRA:MIN:0.5:1:1440 \
RRA:MAX:0.5:1:1440

=== Python scriptas atnaujinimui ir grafikų braižymui ===

'''iot_rrd.py'''
<syntaxhighlight lang="python">
#!/usr/bin/python2.7
# Bidon script for gathering networked devices informations such as temperatures and other equipment and make nice RRD Graphs :)
# (c) 2019 justinas@eofnet.lt
# apt install python-rrdtool
import time
import argparse as ap
from rrdtool import update as rrd_update
import rrdtool
import requests
import json

rrd_file = "/etc/mods/devices_temp.rrd"
devices = [{"name":"server", "host":"127.0.0.1", "color":"#ff0000"},
{"name":"relay", "host":"192.168.254.102", "color":"#0000ff"},
{"name":"cam1", "host":"192.168.254.101", "color":"#3cb371"},
{"name":"cam4", "host":"192.168.254.104", "color":"#ee82ee"},
{"name":"cam5", "host":"192.168.254.105", "color":"#ffa500"},
{"name":"rpitv", "host":"192.168.254.9", "color":"#6a5acd"}]

def temp_data(host):
try:
response = requests.get('http://'+host+':1414/temp')
data = json.loads(response.content)
if data["answer"] is not None:
return str(data["answer"])
else:
return "0"
except:
return "0"

def UpdateRRD():
template = "N"
for device in devices:
tempc = temp_data(device["host"])
template = template + ":"+tempc
print "Device: "+device["name"]+" temp: "+tempc+"C"
ret = rrd_update(rrd_file, template)
if ret:
print rrdtool.error()

def GenDefs():
defs = []
for device in devices:
defs.append("DEF:"+device["name"]+"="+rrd_file+":"+device["name"]+":AVERAGE")
return defs

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

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=Temperatures of the devices',
"-w 800 -h 400",
GenDefs(), GenLines())

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()
elif args.update is not None:
UpdateRRD()
else:
for device in devices:
print "Device: "+device["name"]+" temp: "+temp_data(device["host"])
</syntaxhighlight>

Sudedam visa malonumą į crontab:
* * * * * root /usr/local/bin/iot_rrd.py --update RRD > /dev/null 2>&1
*/5 * * * * root /usr/local/bin/iot_rrd.py --graph RRD > /dev/null 2>&1

[[Category:RaspberryPI]]
[[Category:OrangePI]]

Raspberry temp - Versijų istorija

\dev\null 20:03, 13 birželio 2019