Hi All,
I'm adding kw/h data from my solar panels to a daily summary table. I've
followed the electrical example in the weewx docs and
- added a new database column, solar
- created a solar.py which doesn't do anything other than define the new
unit group and add solar to it
from weewx.engine import StdService
import weewx.units
weewx.units.obs_group_dict['solar'] = 'group_solar'
weewx.units.USUnits['group_solar'] = 'kilowatt_hour'
weewx.units.MetricUnits['group_solar'] = 'kilowatt_hour'
weewx.units.MetricWXUnits['group_solar'] = 'kilowatt_hour'
weewx.units.default_unit_format_dict['kilowatt_hour'] = '%.1f'
weewx.units.default_unit_label_dict['kilowatt_hour'] = ' kw/h'
Image Generator creates a bar chart based on the new solar element and
picks up the default label kw/h
*skin.conf snippet*
[[[monthsolar]]]
yscale = 0, None, 2
plot_type = bar
[[[[solar]]]]
aggregate_type = sum
aggregate_interval = 86400
label = Solar (daily total)
[image: monthsolar_using_solar_column.png]
However when historygenerator.py runs it errors out with "obs_type solar no
unit found".
This is not true as Image generator has worked correctly and also I have
written the weewx.units.obs_group_dict dictionary to syslog so that I could
see the contents and solar is present in the list.
*syslog snippet*
Oct 21 13:55:20 weepi weewxd[32025]: INFO weewx.imagegenerator: Generated
24 images for report SeasonsReport in 1.77 seconds
Oct 21 13:55:20 weepi weewxd[32025]: INFO weewx.reportengine: Copied 0
files to /home/weewx/public_html
Oct 21 13:55:20 weepi weewxd[32025]: INFO weewx.cheetahgenerator: Generated
6 files for report SmartphoneReport in 0.07 seconds
Oct 21 13:55:20 weepi weewxd[32025]: INFO weewx.imagegenerator: Generated 6
images for report SmartphoneReport in 0.23 seconds
Oct 21 13:55:20 weepi weewxd[32025]: INFO weewx.reportengine: Copied 0
files to /home/weewx/public_html/smartphone
Oct 21 13:55:20 weepi weewxd[32025]: INFO weewx.cheetahgenerator: Generated
3 files for report exfoliation in 0.37 seconds
Oct 21 13:55:21 weepi weewxd[32025]: INFO weewx.imagegenerator: Generated
15 images for report exfoliation in 0.69 seconds
Oct 21 13:55:21 weepi weewxd[32025]: INFO weewx.reportengine: Copied 0
files to /home/weewx/public_html/exfoliation
Oct 21 14:00:01 weepi CRON[1553]: (pi) CMD (/home/pi/testwifi.sh)
Oct 21 14:00:04 weepi /home/pi/testwifi.sh: WiFi seems up.
Oct 21 14:00:24 weepi weewxd[32025]: INFO weewx.manager: Added record
2024-10-21 14:00:00 BST (1729515600) to database 'weewx.sdb'
Oct 21 14:00:24 weepi weewxd[32025]: INFO weewx.manager: Added record
2024-10-21 14:00:00 BST (1729515600) to daily summary in 'weewx.sdb'
Oct 21 14:00:24 weepi weewxd[32025]: INFO weewx.restx: OWM: Published
record 2024-10-21 14:00:00 BST (1729515600)
Oct 21 14:00:24 weepi weewxd[32025]: INFO weewx.restx: Wunderground-PWS:
Published record 2024-10-21 14:00:00 BST (1729515600)
Oct 21 14:00:25 weepi /weewxd.py: historygenerator.py: obs_type solar no
unit found
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: Caught
unrecoverable exception in generator
'weewx.cheetahgenerator.CheetahGenerator'
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
local variable 'unit_type' referenced before assignment
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
Traceback (most recent call last):
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
File
"/home/pi/weewx-venv/lib/python3.7/site-packages/weewx/reportengine.py",
line 248, in run
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
obj.start()
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
File
"/home/pi/weewx-venv/lib/python3.7/site-packages/weewx/reportengine.py",
line 465, in start
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
self.run()
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
File
"/home/pi/weewx-venv/lib/python3.7/site-packages/weewx/cheetahgenerator.py",
line 166, in run
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
ngen = self.generate(gen_dict[section_name], section_name, self.gen_ts)
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
File
"/home/pi/weewx-venv/lib/python3.7/site-packages/weewx/cheetahgenerator.py",
line 226, in generate
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
ngen += self.generate(section[subsection], subsection, gen_ts)
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
File
"/home/pi/weewx-venv/lib/python3.7/site-packages/weewx/cheetahgenerator.py",
line 226, in generate
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
ngen += self.generate(section[subsection], subsection, gen_ts)
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
File
"/home/pi/weewx-venv/lib/python3.7/site-packages/weewx/cheetahgenerator.py",
line 313, in generate
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
_filename))
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
File
"/home/pi/weewx-venv/lib/python3.7/site-packages/weewx/cheetahgenerator.py",
line 401, in _getSearchList
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
search_list += obj.get_extension_list(timespan, db_lookup)
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
File "/home/weewx/bin/user/historygenerator.py", line 178, in
get_extension_list
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
self.search_list_extension[table_name] =
self._statsHTMLTable(table_options, table_stats, table_name, binding,
NOAA=noaa)
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
File "/home/weewx/bin/user/historygenerator.py", line 277, in
_statsHTMLTable
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
if unit_type == 'count':
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
UnboundLocalError: local variable 'unit_type' referenced before assignment
Oct 21 14:00:25 weepi weewxd[32025]: ERROR weewx.reportengine: ****
Generator terminated
Oct 21 14:00:28 weepi weewxd[32025]: INFO weewx.imagegenerator: Generated
38 images for report SeasonsReport in 3.82 seconds
Oct 21 14:00:28 weepi weewxd[32025]: INFO weewx.reportengine: Copied 0
files to /home/weewx/public_html
Oct 21 14:00:28 weepi weewxd[32025]: INFO weewx.cheetahgenerator: Generated
6 files for report SmartphoneReport in 0.07 seconds
Oct 21 14:00:29 weepi weewxd[32025]: INFO weewx.imagegenerator: Generated
12 images for report SmartphoneReport in 1.01 seconds
My python is rudimentary but it looks like the try has failed
try:
unit_type =
reading.converter.group_unit_dict[reading.value_t[2]]
except KeyError:
syslog.syslog(syslog.LOG_INFO, "%s: obs_type %s no unit
found" % (os.path.basename(__file__),
obs_type))
If I assign solar to group_energy;
weewx.units.obs_group_dict['solar'] = 'group_energy'
historygenerator runs without error.
I hacked the historygenerator and printed the contents of
reading.converter.group_unit_dict to syslog and solar wasn't in the list.
Hence my conclusion is that either I have not correctly defined the new
unit and /or unit group or historygenerator is not picking up new units.
I have a work around, however as my python is not good I'd like to
understand what's going on.
Any insight welcome, thanks
BTW My setup is RPi4 and weewx5.1 with the AllTimeSeasons
<https://github.com/glennmckechnie/alltimeSeasons> skin extension
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