That's OK. The RRD file contains columns for all supported sensors, not only for the used ones.

Regarding the problem above with the -v flag - hm, strange, never seen. Try to use the debugger pdb.

I will try the pdb to debug, however I do not understand why the weatherradio.html returns nothing while the sensordata.html does.

weatherradio.html and sensordata.html have different RRD files as data source.

yes, the weather.rrd does not seem to be populated correctly, and that gives you an "empty" json file after so it's not showing anything on the webpage.

root@heidenrod-obs:/usr/share/weatherradio# ll
total 6352
drwxr-xr-x 4 root root 4096 Mar 25 13:17 ./
drwxr-xr-x 148 root root 4096 Mar 24 22:21 ../
drwxr-xr-x 4 root root 4096 Mar 25 17:15 bin/
drwxr-xr-x 5 root root 4096 Mar 25 17:16 html/
-rw-r--r-- 1 root root 2584784 Mar 25 22:29 sensors.rrd
-rw-r--r-- 1 root root 3896880 Mar 25 22:29 weather.rrd
root@heidenrod-obs:/usr/share/weatherradio# rrdtool fetch weather.rrd AVERAGE -s -1d -r 1h
Temperature Pressure Humidity DewPoint CloudCover SkyTemperature SQM WindSpeed WindGust WindDirection RaindropFrequency RainVolume

1616626800: nan nan nan nan nan nan nan nan nan nan nan nan
1616630400: nan nan nan nan nan nan nan nan nan nan nan nan
1616634000: nan nan nan nan nan nan nan nan nan nan nan nan
1616637600: nan nan nan nan nan nan nan nan nan nan nan nan
1616641200: nan nan nan nan nan nan nan nan nan nan nan nan
1616644800: nan nan nan nan nan nan nan nan nan nan nan nan
1616648400: nan nan nan nan nan nan nan nan nan nan nan nan
1616652000: nan nan nan nan nan nan nan nan nan nan nan nan
1616655600: nan nan nan nan nan nan nan nan nan nan nan nan
1616659200: nan nan nan nan nan nan nan nan nan nan nan nan
1616662800: nan nan nan nan nan nan nan nan nan nan nan nan
1616666400: nan nan nan nan nan nan nan nan nan nan nan nan
1616670000: nan nan nan nan nan nan nan nan nan nan nan nan
1616673600: nan nan nan nan nan nan nan nan nan nan nan nan
1616677200: nan nan nan nan nan nan nan nan nan nan nan nan
1616680800: 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 nan nan nan nan nan
1616684400: 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 nan nan nan nan nan
1616688000: 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 nan nan nan nan nan
1616691600: 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 nan nan nan nan nan
1616695200: 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 nan nan nan nan nan
1616698800: 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 nan nan nan nan nan
1616702400: 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 nan nan nan nan nan
1616706000: 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 nan nan nan nan nan
1616709600: 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 0.0000000000e+00 nan nan nan nan nan
1616713200: nan nan nan nan nan nan nan nan nan nan nan nan
root@heidenrod-obs:/usr/share/weatherradio#

I ran the pdb, nothing came up also strace'd it and nothing bad came up

And what happens without the "-v" flag? Try running

this:
root@heidenrod-obs:/usr/share/weatherradio# python -m pdb /usr/share/weatherradio/bin/wr_rrd_update.py
> /usr/share/weatherradio/bin/wr_rrd_update.py(16)<module>()
-> import sys
(Pdb) n
> /usr/share/weatherradio/bin/wr_rrd_update.py(17)<module>()
-> from indiclient import *
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(18)<module>()
-> from weatherradio import *
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(19)<module>()
-> from os import path
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(20)<module>()
-> import argparse
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(21)<module>()
-> from pid.decorator import pidfile
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(22)<module>()
-> from pid import PidFileError
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(25)<module>()
-> @pidfile()
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(26)<module>()
-> def update(args, indi=None):
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(66)<module>()
-> if __name__ == "__main__":
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(67)<module>()
-> parser = argparse.ArgumentParser(description="Fetch weather data and store it into the RRD file")
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(68)<module>()
-> parser.add_argument("-v", "--verbose", action='store_true',
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(69)<module>()
-> help="Display progress information")
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(68)<module>()
-> parser.add_argument("-v", "--verbose", action='store_true',
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(70)<module>()
-> parser.add_argument("rrdfile", nargs='?', default=RRDFILE,
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(71)<module>()
-> help="RRD file holding all time series")
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(70)<module>()
-> parser.add_argument("rrdfile", nargs='?', default=RRDFILE,
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(72)<module>()
-> parser.add_argument("rrdsensorsfile", nargs='?', default=RRDSENSORSFILE,
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(73)<module>()
-> help="RRD file holding all sensor data time series")
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(72)<module>()
-> parser.add_argument("rrdsensorsfile", nargs='?', default=RRDSENSORSFILE,
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(75)<module>()
-> args = parser.parse_args()
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(77)<module>()
-> try:
(Pdb)
> /usr/share/weatherradio/bin/wr_rrd_update.py(78)<module>()
-> update(args)
(Pdb)
--Return--
> /usr/share/weatherradio/bin/wr_rrd_update.py(78)<module>()->None
-> update(args)
(Pdb)
--Return--
> <string>(1)<module>()->None
(Pdb)
The program finished and will be restarted

Interesting, I get no output this time.

root@heidenrod-obs:/usr/share/weatherradio# /usr/share/weatherradio/bin/wr_rrd_update.py
root@heidenrod-obs:/usr/share/weatherradio#

the rrd files are not being updated

using python 3.8 by the way

:/usr/share/weatherradio# python -V
Python 3.8.5

I've spent a fair bit of time on this issue, without the -v it does not connect and I am unable to get any data in the weather.rdd file (just a bunch of 0's)

I have tried to flash the board for 9600 and 115200 speed, tried python debugging, tried strace it. I cannot see what's going on.

Interesting find:

root@heidenrod-obs:/usr/share/weatherradio/html/data# ll RTdata_*
-rw-r--r-- 1 root root 22684 Mar 26 15:00 RTdata_1d.json
-rw-r--r-- 1 root root 732 Mar 26 00:00 RTdata_30d.json
-rw-r--r-- 1 root root 27598 Mar 26 15:00 RTdata_6h.json
-rw-r--r-- 1 root root 5674 Mar 26 15:00 RTdata_7d.json
-rw-r--r-- 1 root root 275 Mar 26 15:00 RTdata_lastupdate.json
root@heidenrod-obs:/usr/share/weatherradio/html/data#

all bar the RTdata_lastupdate.json are being populated, and if I understand correctly, the RTdata_ files are the ones used on the weatherradio.html page...

It's really awkward. What about shifting our communication to PN?

I would set a breakpoint at line 42 of wr_rrd_update.py and step through carefully.

HTH
Wolfgang