diff options
| -rwxr-xr-x | plot.py | 31 |
1 files changed, 22 insertions, 9 deletions
@@ -13,6 +13,7 @@ import sys import subprocess import os +import math from string import Template if len(sys.argv) != 3: @@ -28,7 +29,7 @@ argmax = 50000 # If you change this you also need to change the create and graph lists below. # Also note that samples have to be in the same order every time (the key is currently ignored). -samples_per_line=3 +samples_per_line=2 template_values = { # 0 = everything from the input @@ -45,7 +46,8 @@ create = [ 'DS:temp1:GAUGE:50:U:U', 'DS:temp2:GAUGE:50:U:U', - 'DS:hum1:GAUGE:50:U:U', + #'DS:hum1:GAUGE:50:U:U', + 'DS:abshum1:GAUGE:50:U:U', 'RRA:AVERAGE:0.5:1:$total_samples', 'RRA:MIN:0.5:1:$total_samples', @@ -61,10 +63,10 @@ graph = [ '--color=BACK#FFFFFF', #'--title','Temperature', '--vertical-label', 'Temperature °C', - '--right-axis-label', 'Humidity %', - '--right-axis', '2:0', - '--alt-autoscale', - #'-l','25','-u','30', + '--right-axis-label', 'Humidity g/m³', + '--right-axis', '0.5:0', + #'--alt-autoscale', + '-l','10','-u','35', '--rigid', '--left-axis-format', '%4.2lf', '--right-axis-format', '%4.2lf', @@ -72,9 +74,12 @@ graph = [ 'LINE1:temp1#339966:temp 1\l', 'DEF:temp2='+rrd_file+':temp2:AVERAGE', 'LINE1:temp2#663399:temp 2\l', - 'DEF:hum1='+rrd_file+':hum1:AVERAGE', - 'CDEF:hum11=hum1,2,/', - 'LINE1:hum11#996633:hum 1\l', + #'DEF:hum1='+rrd_file+':hum1:AVERAGE', + #'CDEF:hum11=hum1,2,/', + #'LINE1:hum11#996633:hum 1\l', + 'DEF:abshum1='+rrd_file+':abshum1:AVERAGE', + 'CDEF:abshum11=abshum1,2,*', + 'LINE1:abshum11#996633:abshum 1\l', ] #### end of config @@ -100,6 +105,14 @@ with open(log_file,"r") as f: # values for i in range(1, samples_per_line + 1): values.append(float(elem[i].split("=")[1])) + + # absolute humidity + hum=float(elem[3].split("=")[1]) + temp=values[2] + # Source: https://carnotcycle.wordpress.com/2012/08/04/how-to-convert-relative-humidity-to-absolute-humidity/ + abshum=(6.112 * math.e**(17.67 * temp / (temp + 243.5)) * hum * 2.1674) / (273.15+temp) + values.append(abshum) + samples.append(values) # create rrd |