- sensor:

- name: Absolute External Humidity

unique_id: "Absolute External Humidity"

unit_of_measurement: g/m³

state: >

{% set h, t = states('sensor.bmp280_humidity') | float(0), states('sensor.bmp280_external_temperature') | float(0) %}

{{ ((h * 6.112 * 2.1674 * e**((t*17.67)/(t+243.5))/(t+273.15)))|round(2) if not (h == 0 or t == 0) else '0.00' }}

- name: Absolute Internal Humidity

unique_id: "Absolute Internal Humidity"

unit_of_measurement: g/m³

state: >

{% set h, t = states('sensor.living_room_humidity') | float(0), states('sensor.living_room_temperature') | float(0) %}

{{ ((h * 6.112 * 2.1674 * e**((t*17.67)/(t+243.5))/(t+273.15)))|round(2) if not (h == 0 or t == 0) else '0.00' }}

- name: absolute humidity diff

unique_id: "Absolute humidity diff"

unit_of_measurement: g/m³

state: >

{% set int = states ('sensor.absolute_internal_humidity')| float(0) %}

{% set ext = states ('sensor.absolute_external_humidity')| float(0) %}

{{ (int - ext) | round(2) }}