score:0

maybe try gnuplot which is free and easy. downloadable from here.

gnuplot < plotcommands

file: plotcommands

set title 'plotted with gnuplot'
set ylabel 'y-axis'
set xlabel 'time'
set timefmt "%h:%m"
set xdata time
set format x "%h:%m"
set xrange ["14:00":"14:30"]
plot 'points.txt' using 1:2 
set terminal postscript color landscape dashed enhanced 'times-roman'
set output 'file.eps'
set size 1,0.5
replot

this assumes your points are in the file points.txt.

enter image description here

score:1

highcharts uses a timestamps, so you need to convert your time into it, ie. by date.utc().

score:1

you can definitely do with highcharts

here is a line chart example for the same http://jsfiddle.net/kolliparavamsikrishna/jfj5w/

         `data: [
            [date.utc(2010, 0, 1), 29.9],
            [date.utc(2010, 0, 2), 71.5],
            [date.utc(2010, 0, 3), 106.4],
            [date.utc(2010, 0, 6), 129.2],
            [date.utc(2010, 0, 7), 144.0],
            [date.utc(2010, 0, 8), 176.0]
         ]`

here you have to keep the timestamp or the utc date and the second number will be your temperature recording


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