diff --git a/README.md b/README.md
index 6dd5831..993b036 100644
--- a/README.md
+++ b/README.md
@@ -1,23 +1,148 @@
-<H3 align=center>check_snmp_proc.sh</H3>
-<H5 align=center>This is small Nagios plugin for checking status of processes (or quantity of them) via SNMP</H5>
-<br align=left><b>Usage:</b>
-<br align=left>./check_snmp_proc -H 127.0.0.1 -C public -N ssh -w 3 -c 0
-<br>
-<br><b>Where:</b>
-<dd>  -H hostname /string/
-<br>    Name or IP address of host (default 127.0.0.1)
-<br>  -C OID /string/
-<br>     Community name for the host SNMP agent (default public)
-<br>  -N Process name /string/
-<br>     Exact process name (default snmpd)
-<br>  -w warning level /integer/
-<br>     Warning level of running processes (default: 0)
-<br>  -c critical level /integer/
-<br>     Critical level of running processes (default: 0)
-<br>  -h help
-<br>     Print this help screen
-<br>  -V version number
-<br>     Print version and license information </dd>
-<br>
-<br>  This plugin uses the 'snmpwalk' command included with the NET-SNMP package.
-<br>  This nagios plugins comes with ABSOLUTELY NO WARRANTY. So, enjoy ;)
+# check_snmp_proc.sh
+## This is small Nagios plugin for checking status of processes (or quantity of them) via SNMP</H5>
+
+This plugin uses the [utils.sh from monitoring-plugins.org](https://github.com/monitoring-plugins/monitoring-plugins/blob/v2.2/plugins-scripts/utils.sh.in) to be able to use ranges for warning and critical thresholds.
+
+### Usage:
+```
+./check_snmp_proc -H 127.0.0.1 -C public -N ssh -w 3 -c 0
+
+Where:
+  -H hostname /string/
+     Name or IP address of host (default 127.0.0.1)
+  -C OID /string/
+     Community name for the host SNMP agent (default public)
+  -N Process name /string/
+     Exact process name (default snmpd)
+  -w warning level /integer/
+     Warning level of running processes (default: 0)
+  -c critical level /integer/
+     Critical level of running processes (default: 0)
+  -m minimum level /integer/
+     Minimum level for performance data (default: 0)
+  -M maximum level /integer/
+     Maximum level for performance data (default: 100)
+  -h help
+     Print this help screen
+  -V version number
+     Print version and license information </dd>
+
+  This plugin uses the 'snmpwalk' command included with the NET-SNMP package.
+  This nagios plugins comes with ABSOLUTELY NO WARRANTY. So, enjoy ;)
+```
+### Icinga2 Configuration
+```
+object CheckCommand "snmp_proc" {
+  import "plugin-check-command"
+
+  command = [ PluginGitDir + "/check_snmp_proc.sh" ]
+
+  arguments = {
+    "-H" = {
+      value = "$snmp_proc_host$"
+      description = "Name or IP address of host (default 127.0.0.1 but overwritten by address)"
+      required = false
+      skip_key = false
+      order = 1
+    }
+    "-C" = {
+      value = "$snmp_proc_community$"
+      description = "Community name for the host SNMP agent (default public)"
+      required = false
+      skip_key = false
+      order = 2
+    }
+    "-N" = {
+      value = "$snmp_proc_name$"  
+      description = "Exact process name (default snmpd)"
+      required = false
+      skip_key = false
+      order = 3
+    }
+    "-w" = {
+      value = "$snmp_proc_warning$"
+      description = "Warning level of running processes (default: 0)"
+      required = false
+      skip_key = false
+      order = 4
+    }
+    "-c" = {
+      value = "$snmp_proc_critical$"
+      description = "Critical level of running processes (default: 0)"
+      required = false
+      skip_key = false
+      order = 5
+    }
+    "-m" = {
+      value = "$snmp_proc_min$"
+      description = "Minimum for performance data (default: 0)"
+      required = false
+      skip_key = false
+      order = 6
+    }
+    "-M" = {
+      value = "$snmp_proc_max$"
+      description = "Maximum for performance data (default: 100)"
+      required = false
+      skip_key = false
+      order = 7
+    }
+  }
+
+  vars.snmp_proc_host = "$address$"
+}
+
+```
+
+
+```
+apply Service for (snmp_proc => config in host.vars.snmp_proc) {
+  import "generic-service"
+
+  check_command = "snmp_proc"
+
+  display_name = config.display_name
+
+  if (config.groups) {
+    groups = config.groups
+  }
+
+  if (config.check_interval) {
+    check_interval = config.check_interval
+  }
+
+  if (config.retry_interval) {
+    retry_interval = config.retry_interval
+  }
+
+  if (config.max_check_attempts) {
+    max_check_attempts = config.max_check_attempts
+  }
+
+  vars += config
+}
+```
+
+```
+object Host "snmphost.test" {
+  import "generic-host"
+  display_name = "SNMP Test Host"
+  address = "127.0.0.1"
+
+  vars.snmp_proc[ "service_name" ] = {
+    display_name = "Check SNMP service via SNMP process list"
+
+#    snmp_proc_community = "public"
+    snmp_proc_name = "snmp"
+    snmp_proc_warning = "40"
+    snmp_proc_critical = "40"
+
+#    check_interval = 10m
+#    retry_interval = 10m
+    max_check_attempts = 1
+  }
+
+}
+```
+
+
diff --git a/check_snmp_proc.sh b/check_snmp_proc.sh
index 3b7de74..e0d131b 100755
--- a/check_snmp_proc.sh
+++ b/check_snmp_proc.sh
@@ -1,13 +1,13 @@
-#!/bin/bash
+#!/bin/sh
 
-# Plugin return codes
-STATE_OK=0
-STATE_CRITICAL=2
-STATE_WARNING=1
-STATE_UNKNOWN=3
+# boilerplate from check_sensors
+PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin"
+export PATH
+PROGNAME=`basename $0`
+PROGPATH=`echo $0 | sed -e 's,[\\/][^\\/][^\\/]*$,,'`
+REVISION="1.2"
 
-# Version
-VERSION="1.1"
+. $PROGPATH/utils.sh
 
 # Commands
 CMD_BASENAME=$(which basename)
@@ -15,10 +15,6 @@ CMD_SNMPWALK=$(which snmpwalk)
 CMD_GREP=$(which grep)
 CMD_WC=$(which wc)
 
-# Script name
-SCRIPTNAME=`$CMD_BASENAME $0`
-
-
 #Default variables
 OID=.1.3.6.1.2.1.25.4.2.1.2
 HOST="127.0.0.1"
@@ -27,27 +23,23 @@ PROCN="snmpd"
 STATE=$STATE_UNKNOWN
 WARNING=0
 CRITICAL=0
-
+PERFDATA=""
+MIN=0
+MAX=100
 
 print_usage() {
   echo "Usage: ./check_snmp_proc -H 127.0.0.1 -C public -N ssh -w 3 -c 0"
-  echo "  $SCRIPTNAME -H ADDRESS"
-  echo "  $SCRIPTNAME -C STRING"
-  echo "  $SCRIPTNAME -N STRING"
-  echo "  $SCRIPTNAME -w INTEGER"
-  echo "  $SCRIPTNAME -c INTEGER"
-  echo "  $SCRIPTNAME -h"
-  echo "  $SCRIPTNAME -V"
-}
-
-print_version() {
-  echo $SCRIPTNAME version $VERSION
-  echo ""
-  echo "This nagios plugins comes with ABSOLUTELY NO WARRANTY."
+  echo "  $PROGNAME -H ADDRESS"
+  echo "  $PROGNAME -C STRING"
+  echo "  $PROGNAME -N STRING"
+  echo "  $PROGNAME -w INTEGER"
+  echo "  $PROGNAME -c INTEGER"
+  echo "  $PROGNAME -h"
+  echo "  $PROGNAME -V"
 }
 
 print_help() {
-  print_version
+  print_revision $PROGNAME $REVISION
   echo ""
   print_usage
   echo ""
@@ -63,15 +55,20 @@ print_help() {
   echo "   Warning level of running processes (default: 0)"
   echo "-c INTEGER"
   echo "   Critical level of running processes (default: 0)"
+  echo "-m INTEGER"
+  echo "   Minimum for performance data (default: 0)"
+  echo "-M INTEGER"
+  echo "   Maximum for performance data (default: 100)"
   echo "-h"
   echo "   Print this help screen"
   echo "-V"
   echo "   Print version and license information"
   echo ""
   echo "This plugin uses the 'snmpwalk' command included with the NET-SNMP package."
+  echo "This plugin uses the utils.sh from monitoring-plugins.org."
 }
 
-while getopts H:C:N:w:c:Vh OPT
+while getopts H:C:N:w:c:m:M:Vh OPT
 do
   case $OPT in
     H) HOST="$OPTARG" ;;
@@ -79,32 +76,61 @@ do
     N) PROCN="$OPTARG" ;;
     w) WARNING=$OPTARG ;;
     c) CRITICAL=$OPTARG ;;
+    m) MIN=$OPTARG ;;
+    M) MAX=$OPTARG ;;
     h)
       print_help
-      exit $STATE_UNKNOWN
+      exit $STATE_OK
       ;;
     V)
-      print_version
-      exit $STATE_UNKNOWN
+      print_revision $PROGNAME $REVISION
+      exit $STATE_OK
       ;;
    esac
 done
 
 #Plugin 
-PROCN=${PROCN:0:15}
-CNT=`$CMD_SNMPWALK -v1 -On -c $COMM $HOST $OID | $CMD_GREP "\"$PROCN\"" | $CMD_WC -l`
-if [ $CNT -eq 0 ]; then
-        STATE=$STATE_CRITICAL
-	DESCRIPTION="CRITICAL: Process $PROCN does not exist"
-elif [ $CNT -le $WARNING ]; then
-	STATE=$STATE_WARNING
-	DESCRIPTION="WARNING: Running only $CNT instances of $PROCN"
-elif [ $CNT -le $CRITICAL ]; then
-        STATE=$STATE_CRITICAL
-	DESCRIPTION="CRITICAL: Running only $CNT instances of $PROCN"
+#PROCN=${PROCN:0:15}
+PROCN=`echo $PROCN | cut -c -15`
+
+#echo $PROCN
+WLK=`$CMD_SNMPWALK -v1 -On -c $COMM $HOST $OID`
+if [ "$?" -ne 0 ]; then
+  STATE=$STATE_CRITICAL
+  exit $STATE
+fi
+
+
+CNT=`echo $WLK | $CMD_GREP "\"$PROCN\"" | $CMD_WC -l`
+
+check_range $CNT $CRITICAL
+RET_CRIT=$?
+if [ "$RET_CRIT" -eq 2 ]; then
+  STATE=$STATE_CRITICAL
+  exit $STATE
+fi
+
+check_range $CNT $WARNING
+RET_WARN=$?
+if [ "$RET_WARN" -eq 2 ]; then
+  STATE=$STATE_CRITICAL
+  exit $STATE
+fi
+
+#echo "Range return is critical $RET_CRIT and warning $RET_WARN"
+
+PERFDATA="$PROCN=$CNT;$WARNING;$CRITICAL;$MIN;$MAX"
+
+if [ "$RET_CRIT" -eq 0 ]; then
+  STATE=$STATE_CRITICAL
+  DESCRIPTION="PROCESS CRITICAL: Number of $PROCN not in range $CRITICAL"
+elif [ "$RET_WARN" -eq 0 ]; then
+  STATE=$STATE_WARNING
+  DESCRIPTION="PROCESS WARNING: Number of $PROCN not in range $WARNING"
 else
-	STATE=$STATE_OK
-	DESCRIPTION="OK: Process exist. Running instances: $CNT"
-	fi
-echo $DESCRIPTION
+  STATE=$STATE_OK
+  DESCRIPTION="PROCESS OK: Running $CNT instances of $PROCN"
+fi
+
+echo "$DESCRIPTION | $PERFDATA"
 exit $STATE