I have tried to program for myself for the last few days. And I included
the function into the uploader that needs the value. So, when the new year
starts, we will see, wether it works.
At the start of weewx the value ist calculated up to the actual day. It is
saved within the thread class of the uploader. After that, once a day the
value is updated according to the temperature average of the last day.
def calc_gts(self,time_ts,dbmanager):
"""calculate Grünlandtemperatursumme GTS"""
# needed timestamps
_sod_ts = weeutil.weeutil.startOfDay(time_ts) # start of day
_soy_ts = weeutil.weeutil.archiveYearSpan(time_ts)[0] # start of year
_feb_ts = _soy_ts + 2678400 # Feb 1
_mar_ts = _feb_ts + 2419200 # Mar 1 (or Feb 29 in leap year)
_end_ts = _mar_ts + 7948800 # Jun 1 (or May 31 in leap year)
# initialize if program start or new year
if self.last_gts_date is None or self.last_gts_date < _soy_ts:
self.last_gts_date = _soy_ts
self.gts_value = None
self.gts_date = None
loginf("GTS initialized %s" %
time.strftime("%Y-%m-%d",
time.localtime(_soy_ts)))
# calculate
# This runs one loop for every day since New Year at program
# start and after that once a day one loop, only. After May 31th
# no loop is executed.
_loop_ct=0
while self.last_gts_date < _sod_ts and self.last_gts_date < _end_ts:
# the day the average is calculated for
_today = TimeSpan(self.last_gts_date,self.last_gts_date+86400)
# calculate the average of the outside temperature
_result =
weewx.xtypes.get_aggregate('outTemp',_today,'avg',dbmanager)
# convert to centrigrade
if _result is not None:
_result = weewx.units.convert(_result,'degree_C')
# check condition and add to sum
if _result is not None and _result[0] is not None:
if self.gts_value is None:
self.gts_value=0
_dayavg = _result[0]
if _dayavg > 0:
if self.last_gts_date < _feb_ts:
_dayavg *= 0.5
elif self.last_gts_date < _mar_ts:
_dayavg *= 0.75
self.gts_value += _dayavg
if self.gts_value >= 200 and self.gts_date is None:
self.gts_date = self.last_gts_date
# next day
self.last_gts_date += 86400
_loop_ct+=1
loginf("GTS %s, %s loops" % (self.gts_value,_loop_ct))
>>
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