I just put together the air quality sensor from luftdaten.info. So now I want to display PM2.2, PM10, Temp and Humidity on my side map. The sensor gives me following back:
Can one of you guys give me a hint how I have to modify the rule that it extracts the right date. The link of cause I have already change to my local sensor IP 192.168.xxx.xx/data.json
To make it clear no one should write code for me, just point me in the right direction!
assuming that your posted json looks like this before the replacements in your rule i would go with something like this (code is untested)
rule "Outside Airquality"
when
Time cron "0 */2 * ? * *"
then
var String json = executeCommandLine("/bin/sh@@-c@@/usr/bin/curl -s -X GET http://192.168.178.61/data.json",60000)
if (json != null && json.contains("sensordatavalues")) {
var String items = "PM_ten,PM_two,Outside_Temperatur,Outside_Humidity"
var item_buffer = items.split(",")
var counter = -1
while ((counter=counter+1) < 4) {
var value = transform("JSONPATH", "$.sensordatavalues["+counter+"].value", json)
var item_to = item_buffer.get(counter)
sendCommand(item_to,value)
}
}
end
stupid me, i read “data” all the time
but since Dirk was looking for the data of it, it was a lucky accident @dirk_sh have a look at my suggestion above
file: 'file:///Volumes/openHAB-conf/rules/airqual.rules'
severity: 'Fehler'
message: 'The method or field rawMessage is undefined'
at: '6,9'
source: ''
code: 'org.eclipse.xtext.diagnostics.Diagnostic.Linking'
and
file: 'file:///Volumes/openHAB-conf/rules/airqual.rules'
severity: 'Fehler'
message: 'Type mismatch: cannot convert from double to String'
at: '13,29'
source: ''
code: 'org.eclipse.xtext.xbase.validation.IssueCodes.incompatible_types'
in the rule it is highlighted with ** **:
rule "Outside Airquality"
when
Time cron "0 */2 * ? * *"
then
var String json = executeCommandLine("/bin/sh@@-c@@/usr/bin/curl -s -X GET http://192.168.178.61/data.json",60000)
if (**rawMessage** != null && json.contains("sensordatavalues")) {
var String items = "PM_ten,PM_two,Outside_Temperatur,Outside_Humidity"
var item_buffer = items.split(",")
var counter = -1
while ((counter=counter+1) < 4) {
var value = Double.parseDouble(transform("JSONPATH", "$.sensordatavalues["+counter+"].value", json))
var item_to = item_buffer.get(counter)
sendCommand(item_to,**value**)
}
}
end
The first one, no clue. The second one I do not understand with my very limited knowledge, because the item is defined as a number.
rule "Outside Airquality"
when
Time cron "0 */2 * ? * *"
then
var String json = executeCommandLine("/bin/sh@@-c@@/usr/bin/curl -s -X GET http://192.168.178.61/data.json",60000)
if (json != null && json.contains("sensordatavalues")) {
var String items = "PM_ten,PM_two,Outside_Temperatur,Outside_Humidity"
var item_buffer = items.split(",")
var counter = -1
while ((counter=counter+1) < 4) {
var value = Double.parseDouble(transform("JSONPATH", "$.sensordatavalues["+counter+"].value", json)) as Number
var item_to = item_buffer.get(counter)
sendCommand(item_to,**value**)
}
}
end
Bit late to the show but here’s my solution for a luftdaten.info integration:
Rule
rule "Luftdaten einlesen"
when
Time cron "0 * * * * ?"
then
val json = sendHttpGetRequest("http://192.168.X.Y/data.json")
val PM10 = transform("JSONPATH", "$.sensordatavalues[0].value", json)
val PM25 = transform("JSONPATH", "$.sensordatavalues[1].value", json)
val Temp = transform("JSONPATH", "$.sensordatavalues[2].value", json)
val Feuchte = transform("JSONPATH", "$.sensordatavalues[3].value", json)
postUpdate(Luftdaten_PM25, PM25)
postUpdate(Luftdaten_PM10, PM10)
postUpdate(Luftdaten_Temp, Temp)
postUpdate(Luftdaten_Feuchte, Feuchte)
end
Items
Number Luftdaten_PM25 "PM 2,5 [%.2f µg/m³]"
Number Luftdaten_PM10 "PM 10 [%.2f µg/m³]"
Number Luftdaten_Temp "Temperatur [%.1f °C]"
Number Luftdaten_Feuchte "Rel. Luftfeuchte [%.0f %%]"
Sitemap
sitemap default label="Loremipsum" {
Frame label="Feinstaubmesser" {
Text item=Luftdaten_PM25
Text item=Luftdaten_PM10
Text item=Luftdaten_Temp
Text item=Luftdaten_Feuchte
}
}
I tried bjoern’s solution on Openhab 2.4M4, and get errors like this:
Cannot convert '{"software_version": "NRZ-2018-111", "age":"66", "sensordatavalues":[{"value_type":"SDS_P1","value":"24.43"},{"value_type":"SDS_P2","value":"14.30"},{"value_type":"temperature","value":"5.50"},{"value_type":"humidity","value":"99.90"},{"value_type":"samples","value":"591945"},{"value_type":"min_micro","value":"239"},{"value_type":"max_micro","value":"873059"},{"value_type":"signal","value":"-67"}]}' to a state type which item 'Luftdaten_Feuchte' accepts: [DecimalType, QuantityType, UnDefType].
I have not installed any JSON TRansform Addin, as I could not find any on the Add-In Page. Would that be needed to be done manually?
yes, you need to install the transformation add on. it is called “jsonpath”, that’s the keyword to look for. I can confirm bjoern’s solution works when the right add-on is installed
