Read "SOME" data from external file

[BobW55]

Like many others, I run a full weather station that generates a text file with all the current data. It woulld be nice to be able to read this file from my web server, use some of the data and place it on the current Allsky image. I see some are doing it from sensors added to the RPi, Id like to use my stations data.
How much extra programming would I need to learn?

This is the actual text file. Bold sections Id like to use.

{"date":"20:07",

"temp":"33.2",

"tempTL":"29.7",
"tempTH":"34.8",
"intemp":"68.6",

"dew":"28.9",

"dewpointTL":"26.6",
"dewpointTH":"31.1",
"apptemp":"25.2",
"apptempTL":"21.1",
"apptempTH":"28.9",
"wchill":"26.8",
"wchillTL":"22.2",
"heatindex":"33.2",
"heatindexTH":"34.8",
"humidex":"33.2",
"wlatest":"8",

"wspeed":"7",

"wgust":"13",
"wgustTM":"19",
"bearing":"86",
"avgbearing":"77",

"press":"30.366",

"pressTL":"30.341",
"pressTH":"30.423",
"pressL":"29.090",
"pressH":"30.909",

"rfall":"0.00",

"rrate":"0.00",
"rrateTM":"0.00",

"hum":"84",

"humTL":"80",
"humTH":"89",
"inhum":"46",
"SensorContactLost":"0",
"forecast":" Partly cloudy with little temperature change. ",
"tempunit":"F",
"windunit":"mph",
"pressunit":"in",
"rainunit":"in",
"temptrend":"-0.5",
"TtempTL":"08:07",
"TtempTH":"14:38",
"TdewpointTL":"08:07",
"TdewpointTH":"13:24",
"TapptempTL":"08:12",
"TapptempTH":"17:06",
"TwchillTL":"08:12",
"TheatindexTH":"14:38",
"TrrateTM":"00:00",
"ThourlyrainTH":"00:00",
"LastRainTipISO":"2022-12-08 21:57",
"hourlyrainTH":"0.00",
"ThumTL":"02:18",
"ThumTH":"08:19",
"TpressTL":"15:35",
"TpressTH":"03:01",
"presstrendval":"0.007",
"Tbeaufort":"F3",
"TwgustTM":"17:52",
"windTM":"9",
"bearingTM":"68",
"timeUTC":"2022,12,10,1,7,33",
"BearingRangeFrom10":"350",
"BearingRangeTo10":"120",
"UV":"0.0",
"UVTH":"0.7",
"SolarRad":"0",
"SolarTM":"192",
"CurrentSolarMax":"0",
"domwinddir":"NE",
"WindRoseData":[24.0,1136.0,5677.0,12151.0,5527.0,1012.0,24.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0,0.0],
"windrun":"101.2",
"cloudbasevalue":"979",
"cloudbaseunit":"ft",
"version":"1.9.4",
"build":"1099",
"ver":"12"}

[EricClaeys]

@BobW55 Just so I understand, you have some data in a file on the Allsky Website and want some of that data added to the images created on the Pi?
If so, that would require some way of getting the data from the Website to the Pi, possibly via the curl command. You'd then need a script running on the Pi (maybe the same one that calls curl) to grab just the info you want and add it to the "extra text" file.
This script should probably run in the background so it doesn't hold up Allsky if the network is slow.

You could also use lftp from the Pi to "get" the file instead of the way Allsky uses it to "put" files.
If your program that creates the data file on the Website can create a second file with just the data you need, that would simply things. You'd then just need to grab the file and put into the place you specified in the WebUI.

You can do a man lftp and man curl to see how they work. The allky/scripts/upload.sh file should an example of how Allsky uses lftp. You can also look in allsky/tmp/lftp_cmds.txt to see the actual commands given to the last lftp.

Since the input file is a JSON file, you can use the jq command to get the fields you want. For example

TEMP=$(jq .temp INPUT_FILE | sed 's/"//g')

will get the "temp" value and strip the double quotes. You could then add to the "extra text" file:

> EXTRA_TEXT_FILE   # creates an empty file
echo "Temp: ${TEMP} F" >> EXTRA_TEXT_FILE    # ">>" means to append to the file

[BobW55]

The data file resides on my web server. I'll check tomorrow I probably could upload it to a secondary place.