OK, just so I'm understanding this. This starts at the bottom of the
__init__. col_press and col_temp are strings read from my [BMP280] section
of weewx.conf that contain where the data should go, like "barometer" and
"extraTemp1". And I divide the corrected pressure by 100 because it's in
Pascals, which are 100 mbar/hPa.
self.bind(weewx.NEW_LOOP_PACKET, self.new_loop_packet)
def new_loop_packet(self, event)
sensor_init()
raw_pres, raw_temp = read_raw_data()
pres_Pa, temp_C = calibrate_raw_data(raw_pres, raw_temp)
pres_tuple = weewx.units.convertStd((pres_Pa/100, "mbar",
"group_pressure"), packet['usUnits'])
temp_tuple = weewx.units.convertStd((temp_C, "degree_C",
"group_temperature"), packet['usUnits'])
event.record[col_pres] = pres_tuple.value
event.record[col_temp] = temp_tuple.value
On Friday, April 7, 2017 at 9:11:02 AM UTC-4, Tom Keffer wrote:
>
> I am new to Python and objects, really, since it's been over twenty years
>> since I wrote anything. What it looks like to me, for the service, is that
>> weewx is going to create an instance of the class I define in the service
>> file and call the function that's bound to my chosen event, right?
>>
>>
> That's correct.
>
>
>
>> And if I go with NEW_LOOP_PACKET rather than NEW_ARCHIVE_RECORD, do I
>> still need to make sure it gets included in the archive record, or will
>> that happen automatically? Or do I bind to both?
>>
>
> Just add your new observations to the LOOP packet.
>
> LOOP packets are compiled by the "accumulators". They keep track of mins,
> maxes, sums, and counts. These are then used to turn the stream of LOOP
> packets into archive records.
>
> What actually happens depends on whether the user is using software or
> hardware record generation. If software, at the end of an archive interval,
> all the observation types are extracted out of the accumulators and turned
> into an archive record. If hardware, the actual archive record comes from
> the console, however, starting with v3.7.0, this record gets augmented by
> any additional types that can be extracted out of the accumulators. So,
> your new types will get included that way.
>
> Either way, if it's in the LOOP packet, you're good.
>
> -tk
>
>
