#!/bin/sh

# This is the script calling the pressure logger. Still a bit rough, but 
# should be cleaned up at some point. Takes data from device CLR_QO01.
# The return value is saved into a log file for AHU2
# together with a date/time stamp. This script gets regularly called as a
# cron job.

# define logging root
# lg=/home/chris/BTUmetering
lg=MAINPROGROOT

# serial device. Read link reference to keep short file name for getresponse call
serdev=$(readlink -e /dev/serial/by-id/*DIFFPRESSSERIALDEVICE*)

logfile=$lg/log/pressure_AHU2.log
    
# generate time and response from water meter
# response is in volt across 180 ohme
  tm=$(date +"%D %T")
  $lg/getresponse/getresponse -X -d $serdev "bvolt?" >$lg/tmpp
  retval=$?
  rb=$(cat $lg/tmpp)
# See if something silly happened; in that case, uncomment that line
  if [[ $retval -ne 0 ]] ; then
	echo "# $tm $rb retval: $retval" >>$logfile
  else
	echo $tm $rb >>$logfile
  fi