check_dht

This plugin will read the temperature and humidity values from your sensor (dht11, dht22, 3202).

This check plugin needs the adafruit dht library available on: https://github.com/adafruit/Adafruit_Python_DHT.git

Usage:

> python check_dht.py -h
usage: check_dht.py [-h] [-wt WT] [-ct CT] [-wh WH] [-ch CH] {11,22,3202} gpio

Example check:

> python check_dht.py 22 4 -wt 40 -ch 99
OK - Temperature: 24.6 C  Humidity: 47.7 % | temperature=24.6c humidity=47%

Example CheckCommand for use with icinga2:

object CheckCommand "check_dht" {
  command = ["/usr/bin/sudo", "/usr/bin/python", PluginDir + "/check_dht.py" ]
  arguments = {
    "--model" = {
       skip_key = true
       order = 0
       value = "$dht_model$"
    }
    "--gpio" = {
       skip_key = true
       order = 1
       value = "$dht_gpio$"
    }
    "--wt" = "$dht_warning_temperature$"
    "--wh" = "$dht_warning_humidity$"
    "--ct" = "$dht_critical_temperatur$"
    "--ch" = "$dht_critical_humidity$"
  }
}

Example Service for use with icinga2:

apply Service "dht" {
  import "generic-service"

  check_command = "check_dht"

  check_interval = 2m 

  assign where host.vars.tempsensor == "true"
}

It is recommended to check only in 2 min intervalls or above.

Also make sure to additionally set $dht_gpio$ and $dht_mode$ (e.g. in the host config file)