Hi, I’ve been contributing to wunderground PWS for some years with actual weather stations, however I moved now and while I’m not adding an actual weather station to my place I decided to just report temperature and humidity information about my area (that were missing) using the sensors I’ve outside my place.
And I decided to try to get there by just using native HA (it could have been easier with AppAdemon, but hey, need to play with templates!).
So here what I’ve in my configuration.yaml (it could have been also moved an automation, but configuration would have needed a rest_command anyways, so I preferred to keep all in the same place)
input_text:
pws_update_password:
initial: !secret wunderground_pws_update_password
mode: password
rest_command:
update_pws:
method: GET
url: >-
{%- set RT_THRESHOLD = 60 %}
{%- set RT_MIN = 2.5 %}
{%- set pws_id = 'YOUR_PWS_ID' -%}
{%- set pws_password = states('input_text.pws_update_password') -%}
{%- macro temp_f(temp) -%}
{{ '{:.2f}'.format((temp | float * 9/5) + 32) }}
{%- endmacro -%}
{%- macro pressure_inhg(sensor) -%}
{{ '{:.4f}'.format(states(sensor) | float * (1 / 33.86389)) }}
{%- endmacro -%}
{%- macro last_change() -%}
{%- set data = namespace(temps=[]) -%}
{%- for v in varargs -%}
{%- set data.temps = data.temps + [v.last_changed | as_timestamp] -%}
{%- endfor -%}
{{ data.temps | max }}
{%- endmacro -%}
{%- macro dew_point(temp, hum) -%}
{%- set a = 17.27 -%}
{%- set b = 237.7 -%}
{%- set gamma = ((a * temp | float) / (b + temp | float)) + log(hum | float / 100.0) -%}
{{ (b * gamma) / (a - gamma) }}
{%- endmacro -%}
{# List the sensors involved here #}
{%- set last_update_time = last_change(
states.sensor.patio_temperature,
states.sensor.patio_humidity,
states.sensor.terrace_temperature,
states.sensor.terrace_humidity,
states.sensor.terrace_pressure
) | float -%}
{%- set main_temperature = states('sensor.terrace_temperature') | float -%}
{%- set main_humidity = states('sensor.terrace_humidity') | float -%}
{%- set update_data = dict() %}
{%- set pws_data = dict(
ID=pws_id,
PASSWORD=pws_password,
action='updateraw',
softwaretype='homeassistant PWS template 0.5',
dateutc=last_update_time | timestamp_custom('%Y-%m-%d %H:%M:%S', False, 'now'),
tempf=temp_f(main_temperature),
temp2f=temp_f(states('sensor.patio_temperature')),
humidity=main_humidity,
humidity2=states('sensor.patio_humidity'),
baromin=pressure_inhg('sensor.terrace_pressure'),
dewptf=temp_f(dew_point(main_temperature, main_humidity))
) -%}
{%- set update_diff = utcnow() | as_timestamp - last_update_time -%}
{%- if (update_diff < RT_THRESHOLD) -%}
{%- set update_data = dict(realtime=1, rtfreq='{:.2f}'.format([RT_MIN, update_diff] | max)) %}
https://rtupdate.wunderground.com/
{%- else -%}
https://weatherstation.wunderground.com/
{%- endif -%}
weatherstation/updateweatherstation.php?
{%- macro make_uri(dict) -%}
{%- for k, v in dict.items() -%}
{{ k }}={{ v | urlencode }} {%- if not loop.last -%} & {%- endif -%}
{%- endfor -%}
{%- endmacro -%}
{{ make_uri(pws_data) }}&{{ make_uri(update_data) }}
Then you can add an automation to make this trigger when involved sensors are changed (or just updated, that’s why those templates):
alias: PWS Wunderground Update
description: ''
trigger:
- platform: state
entity_id: sensor.patio_temperature
- platform: template
value_template: '{{ (utcnow() - states.sensor.patio_temperature.last_changed).seconds
< 1 }}'
- platform: state
entity_id: sensor.terrace_temperature
- platform: template
value_template: '{{ (utcnow() - states.sensor.terrace_temperature.last_changed).seconds
< 1 }}'
- platform: state
entity_id: sensor.patio_humidity
- platform: template
value_template: '{{ (utcnow() - states.sensor.patio_humidity.last_changed).seconds
< 1 }}'
- platform: state
entity_id: sensor.terrace_humidity
- platform: template
value_template: '{{ (utcnow() - states.sensor.terrace_humidity.last_changed).seconds
< 1 }}'
- platform: state
entity_id: sensor.terrace_pressure
- platform: template
value_template: '{{ (utcnow() - states.sensor.terrace_pressure.last_changed).seconds
< 1 }}'
condition:
- condition: or
conditions:
- condition: template
value_template: '{{ (utcnow() - states.sensor.patio_temperature.last_changed).seconds
< 60 }}'
- condition: template
value_template: '{{ (utcnow() - states.sensor.patio_humidity.last_changed).seconds
< 60 }}'
- condition: template
value_template: '{{ (utcnow() - states.sensor.terrace_temperature.last_changed).seconds
< 60 }}'
- condition: template
value_template: '{{ (utcnow() - states.sensor.terrace_humidity.last_changed).seconds
< 60 }}'
- condition: template
value_template: '{{ (utcnow() - states.sensor.terrace_pressure.last_changed).seconds
< 60 }}'
action:
- service: rest_command.update_pws
mode: parallel
max: 20
This could be probably improved more and moved into a Blueprint if someone may be interested, but well… That’s it for now.
The good part of it is that by now running a PWS, you’ll be eligible to get an API key that you can use with the wunderground integration in order to get further information about the other PWS’s around or general weather.
).