#!/bin/sh # Monitors state of grid-tie PV. # Writes simple HTML file to stdout with the 'live' PV stats. # Also copies files (etc) to make data available live. # None of this data is sensitive or have security implications. # Logging directory. LOGDIR=/var/log/SunnyBeam # Last data: not guaranteed valid. # Format: # 20140722T14:09Z 2810 LASTDATA=${LOGDIR}/LASTDATA.flag LASTSAMPLEDATA="`cat $LASTDATA`" # Compute UTC YYYYMMDD date to match data logging. UTCDATE="`date -u +%Y%m%d`" # Yesterday in same format as UTCDATE (if easy to compute), else blank. #YESTERDAY="`echo $UTCDATE | awk '$3%100 != 01 { printf("%8.8d", $1-1); }'`" YESTERDAY="`date -u --date yesterday +%Y%m%d`" # What should be today's log file. LOGFILE=${LOGDIR}/${UTCDATE}.log # Yesterday's log file, if it exists, else blank. YLOGFILE="" POSSIBLEYLF=${LOGDIR}/${YESTERDAY}.log if [ -e ${POSSIBLEYLF} ]; then YLOGFILE=${POSSIBLEYLF}; fi # Generate HTML header in simplified form... # DHD20160620: now 'html' ie HTML5; was # Title of this page. TITLE="Grid-tie PV Power For 16WW" # Series title text. SERIESTITLE="Earth Notes" # Home link to the index page. cat << EOHEADER $TITLE - $SERIESTITLE

$SERIESTITLE: $TITLE

(See off-grid PV stats/graphs.)

EOHEADER echo "

Flags/status:

The last sample time was "`echo ${LASTSAMPLEDATA} | awk '{print $1}' `".
The last sampled power was "`echo ${LASTSAMPLEDATA} | awk '{print $2}' `"W.
Samples so far today (UTC): `wc -l < ${LOGFILE}`
Samples yesterday (UTC): `wc -l < ${YLOGFILE}`

" # Insert graph of grid-tie power output (if present). if [ -f out/hourly/gridTiePower.png ]; then cat << EOGRAPH

daily grid-tie generation graph

EOGRAPH else echo "

No graph available...

" fi # Insert calendar-month graph (if present). if [ -f out/daily/gridTiePowercm.png ]; then cat << EOGRAPH2

monthly grid-tie generation graph

EOGRAPH2 else echo "

No calendar-month graph available...

" fi # Insert thumbnail and link to all generation. if [ -f out/monthly/Eall.png -a out/monthly/Eall-tn.png ]; then cat << EOGRAPH3

Daily PV Output Since 2008:

EOGRAPH3 fi # Start (non-printing) footer. echo '' # Wrap up the HTML page. cat << FOOTER FOOTER exit 0