Script to import CumulusMX Data from an http call
Posted: Friday 19 February 2016 19:00
I have a weather station sitting on an old Raspberry Pi B running CumulusMX.
The following call returns all the output data:
Quite a lot of information:
I have written the following code to update a few idxs: (first go at lua and not pretty!)
If anyone is interested I would be pleased for some help improving this.
What are the humidity and weather devices looking for in the 0 place holders?
I know the file handling is poor and there must be a better way of loading the t[] array given the nature of the data.
All advice much appreciated.
TXs to the author of the weather Underground parser for many ideas.
The following call returns all the output data:
Code: Select all
http://<ip>:8998/api/data/currentdataQuite a lot of information:
Code: Select all
{"AlltimeHighPressure":"1043.6","AlltimeLowPressure":"981.0","AppTemp":"2.8","AvgTempToday":3.9326086956521555,"Avgbearing":140,"Bearing":180,"BearingRangeFrom10":130,"BearingRangeTo10":180,"Build":"3036","Cloudbase":496,"CloudbaseUnit":"ft","CurrentSolarMax":0,"DataStopped":false,"DominantWindDirection":"SE","Forecast":"Showery, becoming less settled","HeatIndex":"7.3","HighAppTempToday":"4.6","HighAppTempTodayTime":"12:26","HighBeaufortToday":"F3","HighDewpointToday":"6.1","HighDewpointTodayTime":"17:32","HighGustBearingToday":135,"HighGustToday":"16","HighGustTodayTime":"17:35","HighHeatIndexToday":"9.0","HighHeatIndexTodayTime":"12:25","HighHourlyRainToday":"0.0","HighHourlyRainTodayTime":"00:06","HighHumToday":92,"HighHumTodayTime":"09:06","HighPressToday":"1024.3","HighPressTodayTime":"00:56","HighRainRateToday":"0.0","HighRainRateTodayTime":"00:06","HighSolarRadToday":0,"HighSolarRadTodayTime":"00:06","HighTempToday":"9.0","HighTempTodayTime":"12:25","HighUVindexToday":"0.0","HighUVindexTodayTime":"00:06","HighWindToday":"12","Humidex":"7.0","IndoorHum":68,"IndoorTemp":"12.5","LastDataRead":"17:42:59","LastRainTipISO":"2016-02-17 14:38","LowAppTempToday":"-2.8","LowAppTempTodayTime":"06:16","LowDewpointToday":"-2.2","LowDewpointTodayTime":"04:46","LowHumToday":71,"LowHumTodayTime":"12:26","LowPressToday":"1014.2","LowPressTodayTime":"17:18","LowTempToday":"0.4","LowTempTodayTime":"04:46","LowWindChillToday":"-1.3","LowWindChillTodayTime":"06:16","Moonrise":"14:21","Moonset":"05:09","OutdoorDewpoint":"6.1","OutdoorHum":92,"OutdoorTemp":"7.3","PressTrend":"-1.2","PressUnit":"mb","Pressure":"1014.4","RainLastHour":"0.0","RainMonth":"57.3","RainRate":"0.0","RainToday":"0.0","RainUnit":"mm","RainYear":"125.1","RainYesterday":"0.0","Recentmaxgust":"16","SolarRad":0,"StormRain":"0.0","StormRainStart":"-----","Sunrise":"07:19","Sunset":"17:31","SunshineHours":"0.0","TempTrend":"-0.1","TempUnit":"°C","UVindex":"0.0","Version":"3.0.0","WindAverage":"11","WindChill":"4.1","WindLatest":"12","WindRoseData":"0,0,46,0,712,1061,10336,521,4638,0,220,1,0,0,0,0","WindRunToday":"100.4","WindUnit":"mph"}Code: Select all
print("Load CMX data ".._VERSION.."=".."!\n")
local idxthp = 32 --idx of the virtual sensor you need to change this to your own Device IDx
local idxt = 30
local idxh = 31
commandArray = {}
--if devicechanged[sensorwu] then
if true then
-- create file of values from CumulusMX (Change IP address to suit your system)
os.execute('curl "http://<ip>:8998/api/data/currentdata" > /home/pi/CMX.txt')
-- one long line
for line in io.lines("/home/pi/CMX.txt") do
t = {}
s = line
-- find value pairs on pattern match
for k, v in string.gmatch(s, '(%w+)":"(%w+)') do
-- Load array of values keyed by the value name
t[k] = v
-- undo rem line below to print all values to the log
-- print(k.."="..v)
end
for k, v in string.gmatch(s, '(%w+)":(%w+)') do
-- Load array of values keyed by the value name
t[k] = v
-- undo rem line below to print all values to the log
-- print(k.."="..v)
end
varstr="WindRunToday"
--print(varstr.."="..t[varstr].."miles")
end
--TEMP;HUM;HUM_STAT;BAR;BAR_FOR
IndoorTemp=t["IndoorTemp"]
IndoorHum=t["IndoorHum"]
Pressure=t["Pressure"]
PressTrend=t["PressTrend"]
print(IndoorTemp,IndoorHum,Pressure,PressTrend)
commandArray[1] = {['UpdateDevice'] = idxt .. '|0|' .. IndoorTemp}
commandArray[2] = {['UpdateDevice'] = idxh .. '|' .. IndoorHum .. "|0" }
commandArray[3] = {['UpdateDevice'] = idxthp .. '|0|' .. IndoorTemp .. "|" .. IndoorHum .. "|0|" .. Pressure .. "|0" }
end
return commandArrayWhat are the humidity and weather devices looking for in the 0 place holders?
I know the file handling is poor and there must be a better way of loading the t[] array given the nature of the data.
All advice much appreciated.
TXs to the author of the weather Underground parser for many ideas.