#!/bin/bash
#%# family=auto
#%# capabilities=autoconf

: << EOF
=head1 NAME

Outputs the current power, total yield, daily yield from a deye inverter.

=head1 CONFIGURATION

Tested with a "Deye SUN600G3-EU-230 600W" inverter.

Dependencies:
 - wget
 - awk
 - sed
 - bc

plugin config:

  [deye]
  env.user <User>
  env.password <SECRET_PASS>
  env.ip <ip/fqdn>
  env.serial_number 2XXXXXXXXX6-1


=head1 AUTHOR

Michael Grote

=head1 LICENSE

GPLv3 or later

SPDX-License-Identifier: GPL-3.0-or-later

=head1 MAGIC MARKERS

 #%# family=auto

=cut

EOF



# Values in HTML
# sn = serial number
# msvn = Firmware version (main)
# ssvn = Firmware version (slave)
# pv_type = inverter _model
# rate_p = rated power
# now_p = current power
# today_e = yield today
# total_e = total yield
# alarm = alarm
# utime = last updated

# check if inverter is reachable
# inverter is off when there is not enough light to power it
if ping "${ip}" -c1 -W 3 2>&1 > /dev/null ; then
    # get data
    data=$(wget --quiet --user "${user}" --password "${password}" -O - "${ip}"/status.html)
    truncate -s 0  "$MUNIN_STATEFILE"
    current_power=$(echo "$data" | grep "var webdata_now_p"   | awk 'BEGIN {FS="="}{print $2}' | sed 's/[^0-9]*//g' )
    daily_yield=$(echo "$data"   | grep "var webdata_today_e" | awk 'BEGIN {FS="="}{print $2}' | sed 's/[^0-9\.]*//g')
    total_yield=$(echo "$data"   | grep "var webdata_total_e" | awk 'BEGIN {FS="="}{print $2}' | sed 's/[^0-9\.]*//g')
    reachable="1"
    echo "$daily_yield" >> "$MUNIN_STATEFILE"
    echo "$total_yield" >> "$MUNIN_STATEFILE"
else
    current_power="0"
    reachable="0"
    daily_yield=$(cat $MUNIN_STATEFILE | head -n1)
    total_yield=$(cat $MUNIN_STATEFILE | tail -n1)
fi

# wenn parameter = ...
if [ "$1" = "autoconf" ]; then
    if [ ! -x "$(command -v wget)" ]; then
        echo "no (wget not found)"
    elif [ ! -x "$(command -v awk)" ]; then
        echo "no (awk not found)"
    elif [ ! -x "$(command -v sed)" ]; then
        echo "no (sed not found)"
    elif [ ! -x "$(command -v bc)" ]; then
        echo "no (bc not found)"
    fi
    exit 0
fi

if [ "$1" = "config" ]; then
    # setze optionen
    echo "multigraph current_power"
    echo "graph_title Current Power - Local - SN: ${serial_number}"
    echo "graph_vlabel watt"
    echo "graph_category sensors"
    echo "graph_args -l 0"
    echo "graph_info Current generated power in Watt."
    echo "current_power.label watt"

    echo "multigraph daily_yield"
    echo "graph_title Daily Yield - Local - SN: ${serial_number}"
    echo "graph_vlabel kWh"
    echo "graph_category sensors"
    echo "graph_args -l 0"
    echo "graph_info Power generated today."
    echo "daily_yield.label kWh"
    echo "daily_yield.draw AREA"

    echo "multigraph total_yield"
    echo "graph_title Total Yield - Local - SN: ${serial_number}"
    echo "graph_vlabel kWh"
    echo "graph_category sensors"
    echo "graph_args -l 0"
    echo "graph_info Total generated power."
    echo "total_yield.label kWh"
    echo "total_yield.draw AREA"

    echo "multigraph reachable"
    echo "graph_printf %6.0lf"
    echo "graph_title Inverter reachable - Local - SN: ${serial_number}"
    echo "graph_vlabel on/off"
    echo "graph_category sensors"
    echo "graph_args -l 0"
    echo "graph_info Is the Inverter is reachable? 1 is On, 0 is Off"
    echo "reachable.label on/off"
    echo "reachable.draw AREA"

    exit 0
fi

echo "multigraph current_power"
echo "current_power.value $current_power"

echo "multigraph daily_yield"
echo "daily_yield.value $daily_yield"

echo "multigraph total_yield"
echo "total_yield.value $total_yield"

echo "multigraph reachable"
echo "reachable.value $reachable"

exit 0