# Plot 16WW mains voltage, export/spill to grid and PV for a month.

# Input of form (datetime Vrms exportW):
#20220430T23:38Z 248.139 1.254 -2.451
#20220430T23:43Z 249.437 -1.839 -1.83
#20220430T23:48Z 249.252 0.619 -2.674
#20220430T23:53Z 248.664 0.853 -2.997
#20220430T23:58Z 249.416 0.731 -3.095

set timefmt "%Y%m%dT%H:%MZ"
set datafile missing "-"
set format x "%m/%d"
set xdata time


# Start to draw (PNG) output.
#set terminal png small size 640,240
#set terminal png small size 640,160
set terminal png small size 720,180
#set terminal png small size 800,200
#set terminal png size 1600,400
set output ".work/mainsV.png"
set title "16WW Mains Voltage RMS (V) and Export (W)"
#set key off
set key outside
set key right
#set key box
#set lmargin 1.5
# Deliberately truncate left-most X-axis label on left as low-information.
#set lmargin 0
#set rmargin 13.5
#set tmargin 0.5
#set bmargin 1.5
set grid xtics y2tics
#set border 0
#set xrange [0.1:12]
#set yrange [0:60]
#set xtics rotate
set format y "%gV"
#set noytics
#unset autoscale y
#set y2tics
set format y2 "%gW"
set tics scale 3
plot ".work/mainsV.dat" \
       using 1:3 title "E W" with lines axes x1y2 lw 1, \
    "" using 1:4 title "PV W" with lines axes x1y2 lw 1, \
    "" using 1:2 title "V" with lines lw 1