Systemair is providing ventilation units that i realy would like to see suport for i HA.
There has been some atempts to make integration for this units but som conflicts arrise in this github pr. Whit the harse feedback from HA devs in regards to this attempts i doubt the original author will give it a try again. I hope some else can pick up the project.
I know there is a pylib made for systemair cloud that can be used for this project.
I hope i will see support for it soon
Hi,
Iâve recently via yaml integrated my Save VTR300 using modbus TCP, and hope this will help others as this forum has helped me alot by reading other posts from this forum. Im new to HA so i believe my way of doing this could be improved a lot as im in a steep HA learning phase.
At this point iâm considering trying Node-Red for automations and further integration for the schedule variables when i find time.
VTR300 features for this integration listed below (more or less):
The HA integration has been in operation for a about 2 months and works great, Low speed is set if no one is home and the PPM is low enough according to setpoint when in âPPM Autoâ, speed is increased according to automations and it is easy to see overall status from the flow chart.
The modbus documentation has it flaws as most modbus documentation from my experience, not straight forwardâŚ
NOTE! The modbus adr. listed below will not be the same for older Systemair ventilation units.
My current Save VTR300 software is:
If using modbus TCP, the IAM cloud will not work. You must choose between the IAM cloud or Modbus.
Modbus integration gives a lot of new possibilities.
Far from all yaml config is listed because it was too long and not allowed or/and iâm doing something wrong when posting, sorry about that, but i hope it will give an idea and help out others.
modbus:
- name: VTR300
type: tcp
host: IP Adr
port: 502
timeout: 3 #Timeout for slave response in seconds (default=3)
delay: 3 #Time to sleep in seconds after connecting and before sending messages (defualt=0)
climates:
- name: Ventilasjon
slave: 1
data_type: uint
data_count: 1
scale: 0.1
offset: 0
precision: 1
max_temp: 30
min_temp: 15
temp_step: 1
target_temp_register: 2000
current_temp_register: 12102
sensor:
- platform: modbus
scan_interval: 10
registers:
- name: vtr300_inntaks_temperatur
hub: VTR300
device_class: temperature
slave: 1
register: 12101
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: int
- name: vtr300_avtrekks_temperatur
hub: VTR300
device_class: temperature
slave: 1
register: 12543 #2050 #NB!EAT/RAT used for extract air controller
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: uint
- name: vtr300_avkast_temperatur
hub: VTR300
device_class: temperature
slave: 1
register: 12106
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: uint
- name: vtr300_overhetingstemperatur_tilluft
hub: VTR300
device_class: temperature
slave: 1
register: 12107
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: uint
- name: vtr300_relativ_fukt_avtrekk
hub: VTR300
device_class: humidity
slave: 1
register: 12135
register_type: holding
unit_of_measurement: '%RF'
count: 1
data_type: uint
- name: vtr300_kalkulert_fukt_avtrekk
hub: VTR300
device_class: humidity
slave: 1
register: 2210
register_type: holding
unit_of_measurement: '%RF'
count: 1
data_type: uint
- name: vtr300_kalkulert_fukt_inntak
hub: VTR300
device_class: humidity
slave: 1
register: 2211
register_type: holding
unit_of_measurement: '%RF'
count: 1
data_type: uint
- name: vtr300_tilluftsvifte
hub: VTR300
device_class: power_factor
slave: 1
register: 14000
register_type: holding
unit_of_measurement: '%'
count: 1
data_type: uint
- name: vtr300_avtrekksvifte
hub: VTR300
device_class: power_factor
slave: 1
register: 14001
register_type: holding
unit_of_measurement: '%'
count: 1
data_type: uint
- name: vtr300_sommerdrift_vinterdrift #0=sommerdrift, 1=Vinterdrift (status basert pĂĽ fukt i inntak)
hub: VTR300
slave: 1
register: 1038
register_type: holding
count: 1
data_type: uint
- name: vtr300_komfyravtrekk_trykkvakt_av_pa
hub: VTR300
slave: 1
register: 12020
register_type: holding
count: 1
data_type: uint
- name: vtr300_el_kolbe_padrag #TRIAC pĂĽdrag
hub: VTR300
device_class: power_factor
slave: 1
register: 2148
register_type: holding
unit_of_measurement: '%'
count: 1
data_type: uint
- name: vtr300_el_kolbe_av_pa #TRIAC
hub: VTR300
slave: 1
register: 14380
register_type: holding
count: 1
data_type: uint
- name: vtr300_varmegjenvinner
hub: VTR300
device_class: power_factor
slave: 1
register: 14102
register_type: holding
unit_of_measurement: '%'
count: 1
data_type: uint
- name: vtr300_filterbytte_alm
hub: VTR300
slave: 1
register: 7006
register_type: holding
count: 1
data_type: uint
- name: vtr300_filterbytte_md_intervall
hub: VTR300
slave: 1
register: 7000
register_type: holding
unit_of_measurement: 'md'
count: 1
data_type: int
- name: vtr300_tid_til_filter_bytte_s
hub: VTR300
slave: 1
register: 7005
register_type: holding
unit_of_measurement: 's'
count: 2
data_type: uint
- name: vtr300_modus_status_register
hub: VTR300
slave: 1
register: 1160 #0=Auto,1=Man,2=Crowded,3=Refresh,4=Fireplace,5=Away,6=Holiday,7-12 not applicable
register_type: holding
count: 1
data_type: uint
- name: vtr300_manuell_modus_kommando_register
hub: VTR300
slave: 1
register: 1130 #0=Man Stopp,1=Man ???,2=Man Lav,3=Man Normal,4=Man Høy
register_type: holding
count: 1
data_type: uint
- name: vtr300_tilluft_sp
hub: VTR300
device_class: temperature
slave: 1
register: 2000
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: uint
- name: vtr300_avtrekksluft_sp
hub: VTR300
device_class: temperature
slave: 1
register: 2012
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: uint
- name: vtr300_avtrekksluft_min_sp
hub: VTR300
device_class: temperature
slave: 1
register: 2020
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: uint
- name: vtr300_avtrekksluft_max_sp
hub: VTR300
device_class: temperature
slave: 1
register: 2021
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: uint
# 0 = Tillufts reg., 1 = Rom reg.(krever rom temp sensor, derfor NA), 2 = Avtrekks reg.
- name: vtr300_tilluft_rom_avtrekk_reg
hub: VTR300
slave: 1
register: 2030
register_type: holding
count: 1
data_type: uint
- name: vtr300_eco_varme_offset
hub: VTR300
device_class: temperature
slave: 1
register: 2503 #Temp. offset før varme element starter i Eco modus
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: uint
- name: vtr300_nedtelling_modus_tid_s
hub: VTR300
slave: 1
register: 1110
register_type: holding
unit_of_measurement: s
count: 1
data_type: uint
- name: vtr300_ferie_modus_varighet
hub: VTR300
slave: 1
register: 1100
register_type: holding
unit_of_measurement: d
count: 1
data_type: uint
- name: vtr300_borte_modus_varighet
hub: VTR300
slave: 1
register: 1101
register_type: holding
unit_of_measurement: t
count: 1
data_type: uint
- name: vtr300_ildsted_modus_varighet
hub: VTR300
slave: 1
register: 1102
register_type: holding
unit_of_measurement: min
count: 1
data_type: uint
- name: vtr300_boost_modus_varighet
hub: VTR300
slave: 1
register: 1103
register_type: holding
unit_of_measurement: min
count: 1
data_type: uint
- name: vtr300_party_modus_varighet
hub: VTR300
slave: 1
register: 1104
register_type: holding
unit_of_measurement: t
count: 1
data_type: uint
- name: vtr300_fukt_avtrekk_sp
hub: VTR300
device_class: humidity
slave: 1
register: 2202
register_type: holding
unit_of_measurement: '%RF'
count: 1
data_type: uint
- name: vtr300_vifte_hast_komp_avlest
hub: VTR300
device_class: power_factor
slave: 1
register: 1254
register_type: holding
unit_of_measurement: '%'
count: 1
data_type: int
- name: vtr300_vifte_hast_komp_vinter
hub: VTR300
device_class: power_factor
slave: 1
register: 1251
register_type: holding
unit_of_measurement: '%'
count: 1
data_type: int
- name: vtr300_vifte_hast_komp_vinter_start_temp
hub: VTR300
device_class: power_factor
slave: 1
register: 1255
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: int
- name: vtr300_vifte_hast_komp_vinter_max_temp
hub: VTR300
device_class: power_factor
slave: 1
register: 1253
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: int
- name: vtr300_vifte_hast_komp_sjekkes
hub: VTR300
device_class: power_factor
slave: 1
register: 1252
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: int
- name: vtr300_vifte_hast_komp_sommer
hub: VTR300
device_class: power_factor
slave: 1
register: 1258
register_type: holding
unit_of_measurement: '%'
count: 1
data_type: int
- name: vtr300_vifte_hast_komp_sommer_start_temp
hub: VTR300
device_class: power_factor
slave: 1
register: 1256
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: int
- name: vtr300_vifte_hast_komp_sommer_max_temp
hub: VTR300
device_class: power_factor
slave: 1
register: 1257
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
offset: 0
precision: 1
data_type: int
- name: vtr300_a_alm
hub: VTR300
slave: 1
register: 15900
register_type: holding
count: 1
data_type: uint
- name: vtr300_b_alm
hub: VTR300
slave: 1
register: 15901
register_type: holding
count: 1
data_type: uint
- name: vtr300_c_alm
hub: VTR300
slave: 1
register: 15902
register_type: holding
count: 1
data_type: uint
- name: vtr300_filter_wrn_alm
hub: VTR300
slave: 1
register: 15543
register_type: holding
count: 1
data_type: uint
- name: vtr300_filter_alm
hub: VTR300
slave: 1
register: 15141
register_type: holding
count: 1
data_type: uint
- name: vtr300_tilluftstemp_lav_alm
hub: VTR300
slave: 1
register: 15176
register_type: holding
count: 1
data_type: uint
- name: vtr300_filter_wrn_cnt_alm
hub: VTR300
slave: 1
register: 15548
register_type: holding
count: 1
data_type: uint
- platform: template
sensors:
vtr300_tilluft_rf:
value_template: '{{((states.sensor.vtr300_tilluftsvifte.state | int) * 3) | round(0) }}'
friendly_name: "Tilluftsmengde"
unit_of_measurement: 'mÂł/t'
- platform: template
sensors:
vtr300_avtrekk_rf:
value_template: '{{((states.sensor.vtr300_avtrekksvifte.state | int) * 3) | round(0) }}'
friendly_name: "Avtrekksmengde"
unit_of_measurement: 'mÂł/t'
- platform: template
sensors:
vtr300_gjenvinningsgrad:
value_template: '{{((((states.sensor.vtr300_tillufts_temperatur.state | float ) - (states.sensor.vtr300_inntaks_temperatur.state | float)) / ((states.sensor.vtr300_avtrekks_temperatur.state | float ) - (states.sensor.vtr300_inntaks_temperatur.state | float))) * 100) | round(1) }}'
unit_of_measurement: '%'
friendly_name: "Gjenvinningsgrad"
vtr300_tid_til_filterbytte:
friendly_name: 'Neste filter bytte'
value_template: >-
{% if states('sensor.vtr300_tid_til_filter_bytte_s')|int > 1 %}
{% set time = states.sensor.vtr300_tid_til_filter_bytte_s.state | int %}
{% set minutes = ((time % 3600) / 60) | int %}
{% set hours = ((time % 86400) / 3600) | int %}
{% set days = (time / 86400) | int %}
{%- if days > 548 -%}
Mer en 1.5 ĂĽr
{%- else -%}
{%- if days > 0 -%}
{{ days }}d
{%- endif -%}
{%- if hours > 0 -%}
{%- if days > 0 -%}
{{ ' ' }}
{%- endif -%}
{{ hours }}t
{%- endif -%}
{%- if minutes > 0 -%}
{%- if days > 0 or hours > 0 -%}
{{ ' ' }}
{%- endif -%}
{{ minutes }}m
{%- endif -%}
{%- endif -%}
{% else %}
Bytt Filter!
{% endif %}
vtr300_borte_nedtelling_tid_t:
friendly_name: 'GjenstĂĽende tid nĂĽr aktiv'
value_template: >-
{% if states('sensor.vtr300_modus_status_register')|int == 5 %}
{% set time = states.sensor.vtr300_nedtelling_modus_tid_s.state | int %}
{% set minutes = ((time % 3600) / 60) | int %}
{% set hours = ((time % 86400) / 3600) | int %}
{%- if time < 60 -%}
Mindre en 1 minutt
{%- else -%}
{%- if hours > 0 -%}
{{ hours }}t
{%- endif -%}
{%- if minutes > 0 -%}
{%- if hours > 0 -%}
{{ ' ' }}
{%- endif -%}
{{ minutes }}m
{%- endif -%}
{%- endif -%}
{% else %}
Inaktiv
{% endif %}
vtr300_sommer_vinterd_driftstatus:
friendly_name: "Aktiv sesong"
value_template: >-
{% if states('sensor.vtr300_sommerdrift_vinterdrift')|int == 0 %}
Sommerdrift
{% elif states('sensor.vtr300_sommerdrift_vinterdrift')|int == 1 %}
Vinterdrift
{% else %}
Stein dau
{% endif %}
vtr300_reg_mode:
friendly_name: "Regulering"
value_template: >-
{% if states('sensor.vtr300_tilluft_rom_avtrekk_reg')|int == 0 %}
Tilluftsregulering
{% elif states('sensor.vtr300_tilluft_rom_avtrekk_reg')|int == 1 %}
Rom reg.
{% elif states('sensor.vtr300_tilluft_rom_avtrekk_reg')|int == 2 %}
Avtrekksregulering
{% else %}
Stein dau
{% endif %}
vtr300_modus_status:
friendly_name: "Modus"
value_template: >-
{% if states('sensor.vtr300_modus_status_register')|int == 0 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 2 %}
Auto schedule - Lav
{% elif states('sensor.vtr300_modus_status_register')|int == 0 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 3 %}
Auto schedule - Normal
{% elif states('sensor.vtr300_modus_status_register')|int == 0 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 4 %}
Auto schedule - Høy
{% elif states('sensor.vtr300_modus_status_register')|int == 1 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 0 %}
Manuell STOPP
{% elif states('sensor.vtr300_modus_status_register')|int == 1 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 1 %}
Manuell Shitstorm?
{% elif states('sensor.vtr300_modus_status_register')|int == 1 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 2 and is_state('input_boolean.vtr300_ppm_mode_auto_enable_modus_status_dummy', 'off') %}
Manuell Lav
{% elif states('sensor.vtr300_modus_status_register')|int == 1 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 3 and is_state('input_boolean.vtr300_ppm_mode_auto_enable_modus_status_dummy', 'off') %}
Manuell Normal
{% elif states('sensor.vtr300_modus_status_register')|int == 1 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 4 and is_state('input_boolean.vtr300_ppm_mode_auto_enable_modus_status_dummy', 'off') %}
Manuell Høy
{% elif states('sensor.vtr300_modus_status_register')|int == 3 %}
Boost
{% elif states('sensor.vtr300_modus_status_register')|int == 2 %}
Party
{% elif states('sensor.vtr300_modus_status_register')|int == 4 %}
Ildsted
{% elif states('sensor.vtr300_modus_status_register')|int == 5 %}
Borte
{% elif states('sensor.vtr300_modus_status_register')|int == 6 %}
ferie
{% elif states('sensor.vtr300_modus_status_register')|int == 7 %}
Cooker
{% elif states('sensor.vtr300_modus_status_register')|int == 8 %}
Hood
{% elif states('sensor.vtr300_modus_status_register')|int == 9 %}
Støvsuger
{% elif states('sensor.vtr300_modus_status_register')|int == 10 %}
CDI1
{% elif states('sensor.vtr300_modus_status_register')|int == 11 %}
CDI2
{% elif states('sensor.vtr300_modus_status_register')|int == 12 %}
Komfyravtrekk
{% elif states('sensor.vtr300_modus_status_register')|int == 1 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 2 and is_state('input_boolean.vtr300_ppm_mode_auto_enable_modus_status_dummy', 'on') %}
PPM Auto - Lav
{% elif states('sensor.vtr300_modus_status_register')|int == 1 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 3 and is_state('input_boolean.vtr300_ppm_mode_auto_enable_modus_status_dummy', 'on') %}
PPM Auto - Normal
{% elif states('sensor.vtr300_modus_status_register')|int == 1 and states('sensor.vtr300_manuell_modus_kommando_register')|int == 4 and is_state('input_boolean.vtr300_ppm_mode_auto_enable_modus_status_dummy', 'on') %}
PPM Auto - Høy
{% elif states('sensor.vtr300_modus_status_register')|int == 3 and is_state('input_boolean.vtr300_ppm_mode_auto_enable_modus_status_dummy', 'on') %}
PPM Auto - BOOST
{% else %}
WTF
{% endif %}
vtr300_manuell_button_modus_status:
friendly_name: "Manuell button modus status"
value_template: >-
{% if states('sensor.vtr300_modus_status_register')|int == 0 and states('sensor.vtr300_manuell_modus_kommando_register')|int > 0 %}
Auto schedule
{% elif states('sensor.vtr300_modus_status_register')|int == 1 and states('sensor.vtr300_manuell_modus_kommando_register')|int > 0 and is_state('input_boolean.vtr300_ppm_mode_auto_enable_modus_status_dummy', 'off') %}
Manuell
{% elif states('sensor.vtr300_modus_status_register')|int == 1 and states('sensor.vtr300_manuell_modus_kommando_register')|int > 0 and is_state('input_boolean.vtr300_ppm_mode_auto_enable_modus_status_dummy', 'on') %}
PPM Auto
{% elif states('sensor.vtr300_modus_status_register')|int > 0 and states('sensor.vtr300_manuell_modus_kommando_register')|int > 0 and is_state('input_boolean.vtr300_ppm_mode_auto_enable_modus_status_dummy', 'off') %}
Standby
{% else %}
Av
{% endif %}
input_number:
vtr300_eco_offset_temp_sp:
name: Eco offset
min: 0
max: 10
step: 1
mode: box
unit_of_measurement: °C
icon: mdi:temperature
vtr300_ferie_modus_varighet_sp:
name: Ferie modus - Ănsket varighet
min: 1
max: 365
step: 1
mode: box
unit_of_measurement: d
icon: mdi:timelapse
vtr300_borte_modus_varighet_sp:
name: Borte modus - Ănsket varighet
min: 1
max: 72
step: 1
mode: box
unit_of_measurement: t
icon: mdi:timelapse
vtr300_ildsted_modus_varighet_sp:
name: Ildsted modus - Ănsket varighet
min: 1
max: 60
step: 1
mode: box
unit_of_measurement: m
icon: mdi:timelapse
switch:
- platform: template
switches:
vtr300_auto_modus:
friendly_name: Auto modus
value_template: "{{ is_state('sensor.vtr300_modus_status', 'Auto schedule - Lav') or is_state('sensor.vtr300_modus_status', 'Auto schedule - Normal') or is_state('sensor.vtr300_modus_status', 'Auto schedule - Høy') }}"
turn_on:
- service: script.vtr300_auto_modus
data:
action: "on"
turn_off:
service: script.vtr300_auto_dummy_av
data:
action: "off"
vtr300_man_stopp_modus:
friendly_name: Manuell stopp
value_template: "{{ is_state('sensor.vtr300_modus_status', 'Manuell STOPP') }}"
turn_on:
- service: script.vtr300_man_stopp_modus
data:
action: "on"
turn_off:
service: script.vtr300_man_stopp_dummy_av
data:
action: "off"
vtr300_man_lav_modus:
friendly_name: Lav hastighet
value_template: "{{ is_state('sensor.vtr300_modus_status', 'Manuell Lav') or is_state('sensor.vtr300_modus_status', 'Auto schedule - Lav') or is_state('sensor.vtr300_modus_status', 'PPM Auto - Lav') }}"
turn_on:
- service: script.vtr300_man_lav_modus
data:
action: "on"
turn_off:
service: script.vtr300_man_lav_dummy_av
data:
action: "off"
vtr300_man_normal_modus:
friendly_name: Normal hastighet
value_template: "{{ is_state('sensor.vtr300_modus_status', 'Manuell Normal') or is_state('sensor.vtr300_modus_status', 'Auto schedule - Normal') or is_state('sensor.vtr300_modus_status', 'PPM Auto - Normal') }}"
turn_on:
- service: script.vtr300_man_normal_modus
data:
action: "on"
turn_off:
service: script.vtr300_man_normal_dummy_av
data:
action: "off"
vtr300_man_hoy_modus:
friendly_name: Høy hastighet
value_template: "{{ is_state('sensor.vtr300_modus_status', 'Manuell Høy') or is_state('sensor.vtr300_modus_status', 'Auto schedule - Høy') or is_state('sensor.vtr300_modus_status', 'PPM Auto - Høy') }}"
turn_on:
service: script.vtr300_man_hoy_modus
data:
action: "on"
turn_off:
service: script.vtr300_man_hoy_dummy_av
data:
action: "off"
- platform: modbus
scan_interval: 10
registers:
- name: vtr300_eco_modus
hub: VTR300
slave: 1
register: 2504
command_on: 1 #Aktiver Eco drift basert pĂĽ temp. offset
command_off: 0 #Deaktiver Eco drift
verify_state: true
register_type: holding
verify_register: 2504
state_on: 1
state_off: 0
input_boolean:
vtr300_auto_modus_status_dummy:
name: VTR300 Auto modus status dummy
icon: mdi:fan
vtr300_party_modus_status_dummy:
name: VTR300 Party modus status dummy
icon: mdi:fan
vtr300_boost_modus_status_dummy:
name: VTR300 Boost modus status dummy
icon: mdi:fan
vtr300_ildsted_modus_status_dummy:
name: VTR300 Ildsted modus status dummy
icon: mdi:fan
vtr300_borte_modus_status_dummy:
name: VTR300 Borte modus status dummy
icon: mdi:fan
vtr300_ferie_modus_status_dummy:
name: VTR300 ferie modus status dummy
icon: mdi:fan
vtr300_man_stopp_modus_status_dummy:
name: VTR300 Manuell Stopp modus status dummy
icon: mdi:fan
vtr300_man_lav_modus_status_dummy:
name: VTR300 Manuell Lav modus status dummy
icon: mdi:fan
vtr300_man_normal_modus_status_dummy:
name: VTR300 Manuell Normal modus status dummy
icon: mdi:fan
vtr300_man_hoy_modus_status_dummy:
name: VTR300 Manuell Høy modus status dummy
icon: mdi:fan
vtr300_ppm_mode_auto_enable_modus_status_dummy:
name: VTR300 PPM Auto Enable modus status dummy
icon: mdi:fan
script:
vtr300_man_normal_modus:
sequence:
- service: input_boolean.turn_on
entity_id: input_boolean.vtr300_man_normal_modus_status_dummy
#Aktiver manuell modus før hastighet
- service: modbus.write_register
data_template:
hub: VTR300
unit: 1
address: 1161
value: 2
- service: switch.turn_off
entity_id: switch.vtr300_man_stopp_modus
- service: switch.turn_off
entity_id: switch.vtr300_man_lav_modus
- service: switch.turn_off
entity_id: switch.vtr300_man_hoy_modus
- service: switch.turn_off
entity_id: switch.vtr300_auto_modus
- service: switch.turn_off
entity_id: switch.vtr300_party_modus
- service: switch.turn_off
entity_id: switch.vtr300_boost_modus
- service: switch.turn_off
entity_id: switch.vtr300_ildsted_modus
- service: switch.turn_off
entity_id: switch.vtr300_borte_modus
- service: switch.turn_off
entity_id: switch.vtr300_ferie_modus
- delay: '00:00:02'
- service: modbus.write_register
data_template:
hub: VTR300
unit: 1
address: 1130
value: 3
vtr300_man_normal_dummy_av:
sequence:
service: input_boolean.turn_off
entity_id: input_boolean.vtr300_man_normal_modus_status_dummy
vtr300_man_hoy_modus:
sequence:
- service: input_boolean.turn_on
entity_id: input_boolean.vtr300_man_hoy_modus_status_dummy
#Aktiver manuell modus før hastighet
- service: modbus.write_register
data_template:
hub: VTR300
unit: 1
address: 1161
value: 2
- service: switch.turn_off
entity_id: switch.vtr300_man_stopp_modus
- service: switch.turn_off
entity_id: switch.vtr300_man_lav_modus
- service: switch.turn_off
entity_id: switch.vtr300_man_normal_modus
- service: switch.turn_off
entity_id: switch.vtr300_auto_modus
- service: switch.turn_off
entity_id: switch.vtr300_party_modus
- service: switch.turn_off
entity_id: switch.vtr300_boost_modus
- service: switch.turn_off
entity_id: switch.vtr300_ildsted_modus
- service: switch.turn_off
entity_id: switch.vtr300_borte_modus
- service: switch.turn_off
entity_id: switch.vtr300_ferie_modus
- delay: '00:00:02'
- service: modbus.write_register
data_template:
hub: VTR300
unit: 1
address: 1130
value: 4
vtr300_man_hoy_dummy_av:
sequence:
service: input_boolean.turn_off
entity_id: input_boolean.vtr300_man_hoy_modus_status_dummy
Welcome to Home assistant forum Glenn Martin Trevland.
This is amazing work, i am truly impressed what you have made.
It would have been realy cool if you could get the rest of the code presented also, maybe some of the fanzy dashboards you have there, iam shure there are many users that would apreciate it.
nice job ! can you send us the full config file ?
Wow. Great work. The configuration you posted worked âstraight out of the boxâ. Thank you!
Can you please post your full configuration for Systemair (on Github maybe?). That screenshot sure looks awsome
Hi,
Thanks and a happy new year!
All the config files for the VTR300 will be posted when finished, it will take some time due to regular work, family things and because the modbus integration is not straight forward and requires trail and error.
The schedule and fan compensation is now implemented in node red but are not fully finished yet.
Almost all setpoints readback (updating âinput_numberâ and âinput_datetimeâ if locally changed on the HMI panel) and modbus write will be handled through node red, if not it would require 112 automations only for the time schedule because each âhourâ and âminâ has its own register and because it is nice/best to have the correct value in HA if values are locally changed from the panel on the unit.
Any update on this one?
Slow progress due to lack of time and some serious RAM performance issues as the HA integrations are growing rapidlyâŚ
Not so much left dough.
This is done:
This is to be done:
MInd sharing the code even though itâs not complete?
Would love to see some fresh ideas. Have an older VSR300 unit in my apartment. To make it look neat used MQTT climate component
Now got a new VSR 500 in country house to play around. Just pasted your older code without going through yet. Get some errors like missing scripts e.t.c
P.S. Also what is the use for the compensation variable like the one vifte_hast_komp_sommer_max_temp?
The files are too big to share in the forum, send me a pm and i will send my previous config.
The fan compensation is not a must, i just added it mostly because itâs possible. It might be useful if the outdoor temp is extreemly cold as reducing the fan speed with the fan compensation will reduce the load on the el.heater (lower the cost if wanted) and maybe reduce possibility for condensation inside the ventilation unit if itâs very cold outside (a guess from my side). During the summer i believe the compensation works opposite of the winter compensation by increasing the fan speed if it is hot by setting the summer fan comp. (summer comp is not tested yet, only winter). I hope that answered your questions.
The compensation also helps with regulating the humidity. I have my temperature setpoint set at 25C and ECO offset at 10C so my heater doesnât start until supply air falls to 15C. I donât feel the cold draught even when directly under the supply valves and it is much cheaper to heat the air using your main heating system. But I use compensation to lower the volume of air when the temperatures fall below 0C to avoid drying up the house, as absolute humidity is very low in cold air. In the summer it can also be used to avoid high humidity buildup.
Hi,
I have a SAVE VSR 300
To integrate it in HA i used an USB to RS485 stick (https://www.aliexpress.com/item/32428596578.html)
# configuration.yaml entry for a serial connection
modbus:
name: hub1
type: serial
method: rtu
port: /dev/ttyUSB0
baudrate: 9600
stopbits: 1
bytesize: 8
parity: E
timeout: 10
#sensors.yaml
#MODBUS
- platform: modbus
scan_interval: 100
registers:
- name: air_extract_air_temp
hub: hub1
slave: 1
register: 12543
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
# data_type: float
precision: 1
- platform: modbus
scan_interval: 120
registers:
- name: air_outdoor_air_temp
hub: hub1
slave: 1
register: 12101
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
# data_type: float
precision: 1
- platform: modbus
scan_interval: 40
registers:
- name: air_supply_air_temp
hub: hub1
slave: 1
register: 12102
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
# data_type: float
precision: 1
- platform: modbus
scan_interval: 35
registers:
- name: air_overheat_temp
hub: hub1
slave: 1
register: 12107
register_type: holding
unit_of_measurement: °C
count: 1
scale: 0.1
# data_type: float
precision: 1
- platform: modbus
scan_interval: 10
registers:
- name: air_supply_fan
hub: hub1
slave: 1
register: 12400
register_type: input
unit_of_measurement: rpm
count: 1
# scale: 0.1
# data_type: float
precision: 1
- platform: modbus
scan_interval: 10
registers:
- name: air_extract_fan
hub: hub1
slave: 1
register: 12401
register_type: input
unit_of_measurement: rpm
count: 1
# scale: 0.1
# data_type: float
precision: 1
- platform: modbus
scan_interval: 60
registers:
- name: air_rh_sensor
hub: hub1
slave: 1
register: 12135
register_type: holding
unit_of_measurement: 
count: 1
# data_type: float
precision: 0
- platform: modbus
scan_interval: 3
registers:
- name: hrv_active_user_mode
hub: hub1
slave: 1
register: 1160
register_type: input
count: 1
# scale: 0.1
# data_type: float
precision: 0
- platform: modbus
scan_interval: 5
registers:
- name: hrv_active_fan_mode
hub: hub1
slave: 1
register: 1130
register_type: input
count: 1
# scale: 0.1
# data_type: float
precision: 0
- platform: modbus
scan_interval: 5
registers:
- name: hrv_active_temperature
hub: hub1
slave: 1
register: 2053
register_type: input
count: 1
scale: 0.1
# data_type: float
precision: 0
- platform: modbus
scan_interval: 9
registers:
- name: triac_output
hub: hub1
slave: 1
register: 2148
register_type: input
unit_of_measurement: 
count: 1
# data_type: binary
precision: 0
- platform: modbus
scan_interval: 7
registers:
- name: heater_active
hub: hub1
slave: 1
register: 14380
register_type: input
# unit_of_measurement:
count: 1
# data_type: binary
precision: 0
- platform: modbus
scan_interval: 11
registers:
- name: exchanger_active
hub: hub1
slave: 1
register: 14103
register_type: input
# unit_of_measurement:
count: 1
# data_type: binary
precision: 0
- platform: modbus
scan_interval: 10
registers:
- name: humidity_transfer
hub: hub1
slave: 1
register: 2146
register_type: input
count: 1
precision: 0
NodeRed:
[{"id":"d420ee28.a1795","type":"tab","label":"HRV","disabled":false,"info":""},{"id":"95a074eb.9f83c8","type":"server-state-changed","z":"d420ee28.a1795","name":"desired_user_mode","server":"6cc1c546.4430dc","version":1,"exposeToHomeAssistant":false,"haConfig":[{"property":"name","value":""},{"property":"icon","value":""}],"entityidfilter":"input_select.hrv_desired_user_mode","entityidfiltertype":"exact","outputinitially":false,"state_type":"str","haltifstate":"","halt_if_type":"str","halt_if_compare":"is","outputs":1,"output_only_on_state_change":true,"x":190,"y":80,"wires":[["13548516.dd7a7b"]]},{"id":"13548516.dd7a7b","type":"function","z":"d420ee28.a1795","name":"","func":"switch(msg.payload){\n case \"None\":\n msg.payload = 0;\n break;\n case \"Auto\":\n msg.payload = 1;\n break;\n case \"Manual\":\n msg.payload = 2;\n break;\n case \"Crowded\":\n msg.payload = 3;\n break;\n case \"Refresh\":\n msg.payload = 4;\n break;\n case \"Fireplace\":\n msg.payload = 5;\n break;\n case \"Away\":\n msg.payload = 6;\n break;\n case \"Holiday\":\n msg.payload = 7;\n break;\n default:\n msg.payload = 0;\n}\n\n//msg.payload = { value: msg.payload, 'fc': 6, 'unitid': 1, 'address': 1161 , 'quantity': 1 };\n\nreturn msg;","outputs":1,"noerr":0,"x":350,"y":80,"wires":[["c4001308.2278c"]]},{"id":"c4001308.2278c","type":"api-call-service","z":"d420ee28.a1795","name":"Set desired_user_mode","server":"6cc1c546.4430dc","version":1,"debugenabled":false,"service_domain":"modbus","service":"write_register","entityId":"","data":"{\"address\":1161,\"unit\":1,\"value\":\"{{payload}}\",\"hub\":\"hub1\"}","dataType":"json","mergecontext":"","output_location":"","output_location_type":"none","mustacheAltTags":false,"x":550,"y":80,"wires":[[]]},{"id":"e688476d.119478","type":"comment","z":"d420ee28.a1795","name":"Set desired_user_mode to HRV","info":"","x":230,"y":40,"wires":[]},{"id":"e5eb1534.546788","type":"server-state-changed","z":"d420ee28.a1795","name":"active_user_mode","server":"6cc1c546.4430dc","version":1,"exposeToHomeAssistant":false,"haConfig":[{"property":"name","value":""},{"property":"icon","value":""}],"entityidfilter":"sensor.hrv_active_user_mode","entityidfiltertype":"exact","outputinitially":false,"state_type":"str","haltifstate":"","halt_if_type":"str","halt_if_compare":"is","outputs":1,"output_only_on_state_change":true,"x":790,"y":540,"wires":[["7f43431e.622dfc"]]},{"id":"7f43431e.622dfc","type":"function","z":"d420ee28.a1795","name":"","func":"switch(msg.payload){\n case \"0\":\n msg.payload = \"Auto\";\n break;\n case \"1\":\n msg.payload = \"Manual\";\n break;\n case \"2\":\n msg.payload = \"Crowded\";\n break;\n case \"3\":\n msg.payload = \"Refresh\";\n break;\n case \"4\":\n msg.payload = \"Fireplace\";\n break;\n case \"5\":\n msg.payload = \"Away\";\n break;\n case \"6\":\n msg.payload = \"Holiday\";\n break;\n case \"7\":\n msg.payload = \"Cooker Hood\";\n break;\n case \"8\":\n msg.payload = \"Vacuum Cleaner\";\n break;\n case \"9\":\n msg.payload = \"CDI1\";\n break;\n case \"10\":\n msg.payload = \"CDI2\";\n break;\n case \"11\":\n msg.payload = \"CDI3\";\n break;\n case \"12\":\n msg.payload = \"PressureGuard\";\n break;\n default:\n msg.payload = \"Error\";\n}\n\n//msg.payload = { value: msg.payload, 'fc': 6, 'unitid': 1, 'address': 1161 , 'quantity': 1 };\n\nreturn msg;","outputs":1,"noerr":0,"x":1020,"y":540,"wires":[["bd6163e7.6f971"]]},{"id":"c20c703e.58438","type":"comment","z":"d420ee28.a1795","name":"Update UI based on HRV info","info":"Some mode are active for a specific time. After this period USER_MODE return to previous value.","x":220,"y":480,"wires":[]},{"id":"bd6163e7.6f971","type":"api-call-service","z":"d420ee28.a1795","name":"Set desired_user_mode","server":"6cc1c546.4430dc","version":1,"debugenabled":false,"service_domain":"input_select","service":"select_option","entityId":"input_select.hrv_desired_user_mode","data":"{\"option\":\"{{payload}}\"}","dataType":"json","mergecontext":"","output_location":"","output_location_type":"none","mustacheAltTags":false,"x":1230,"y":540,"wires":[[]]},{"id":"54e9ade.53c3854","type":"server-state-changed","z":"d420ee28.a1795","name":"fan_mode","server":"6cc1c546.4430dc","version":1,"exposeToHomeAssistant":false,"haConfig":[{"property":"name","value":""},{"property":"icon","value":""}],"entityidfilter":"input_select.hrv_fan_mode","entityidfiltertype":"exact","outputinitially":false,"state_type":"str","haltifstate":"","halt_if_type":"str","halt_if_compare":"is","outputs":1,"output_only_on_state_change":true,"x":160,"y":200,"wires":[["635f286f.219e38"]]},{"id":"635f286f.219e38","type":"function","z":"d420ee28.a1795","name":"","func":"switch(msg.payload){\n case \"Off\":\n msg.payload = 0;\n break;\n case \"Low\":\n msg.payload = 2;\n break;\n case \"Normal\":\n msg.payload = 3;\n break;\n case \"High\":\n msg.payload = 4;\n break;\n default:\n msg.payload = 3;\n}\n\n//msg.payload = { value: msg.payload, 'fc': 6, 'unitid': 1, 'address': 1161 , 'quantity': 1 };\n\nreturn msg;","outputs":1,"noerr":0,"x":350,"y":200,"wires":[["99d27bff.ee2238"]]},{"id":"99d27bff.ee2238","type":"api-call-service","z":"d420ee28.a1795","name":"Set fan_mode","server":"6cc1c546.4430dc","version":1,"debugenabled":false,"service_domain":"modbus","service":"write_register","entityId":"","data":"{\"address\":1130,\"unit\":1,\"value\":\"{{payload}}\",\"hub\":\"hub1\"}","dataType":"json","mergecontext":"","output_location":"","output_location_type":"none","mustacheAltTags":false,"x":520,"y":200,"wires":[[]]},{"id":"74c6591d.222978","type":"comment","z":"d420ee28.a1795","name":"Set fan_mode to HRV","info":"","x":200,"y":160,"wires":[]},{"id":"431ab7dc.42d818","type":"server-state-changed","z":"d420ee28.a1795","name":"active_fan_mode","server":"6cc1c546.4430dc","version":1,"exposeToHomeAssistant":false,"haConfig":[{"property":"name","value":""},{"property":"icon","value":""}],"entityidfilter":"sensor.hrv_active_fan_mode","entityidfiltertype":"exact","outputinitially":false,"state_type":"str","haltifstate":"","halt_if_type":"str","halt_if_compare":"is","outputs":1,"output_only_on_state_change":true,"x":780,"y":660,"wires":[["1c190b23.960205"]]},{"id":"1c190b23.960205","type":"function","z":"d420ee28.a1795","name":"","func":"switch(msg.payload){\n case \"0\":\n msg.payload = \"Off\";\n break;\n case \"2\":\n msg.payload = \"Low\";\n break;\n case \"3\":\n msg.payload = \"Normal\";\n break;\n case \"4\":\n msg.payload = \"High\";\n break;\n default:\n msg.payload = \"Error\";\n}\n\n//msg.payload = { value: msg.payload, 'fc': 6, 'unitid': 1, 'address': 1161 , 'quantity': 1 };\n\nreturn msg;","outputs":1,"noerr":0,"x":1020,"y":660,"wires":[["dc35d906.905f18"]]},{"id":"dc35d906.905f18","type":"api-call-service","z":"d420ee28.a1795","name":"Set desired_fan_mode","server":"6cc1c546.4430dc","version":1,"debugenabled":false,"service_domain":"input_select","service":"select_option","entityId":"input_select.hrv_fan_mode","data":"{\"option\":\"{{payload}}\"}","dataType":"json","mergecontext":"","output_location":"","output_location_type":"none","mustacheAltTags":false,"x":1220,"y":660,"wires":[[]]},{"id":"bc2e9915.41f348","type":"server-state-changed","z":"d420ee28.a1795","name":"temperature","server":"6cc1c546.4430dc","version":1,"exposeToHomeAssistant":false,"haConfig":[{"property":"name","value":""},{"property":"icon","value":""}],"entityidfilter":"input_number.hrv_temperature","entityidfiltertype":"exact","outputinitially":false,"state_type":"str","haltifstate":"","halt_if_type":"str","halt_if_compare":"is","outputs":1,"output_only_on_state_change":true,"x":170,"y":320,"wires":[["6656e916.035688"]]},{"id":"6656e916.035688","type":"function","z":"d420ee28.a1795","name":"","func":"msg.payload = msg.payload * 10;\nreturn msg;","outputs":1,"noerr":0,"x":350,"y":320,"wires":[["7e0d4f49.6c978"]]},{"id":"7e0d4f49.6c978","type":"api-call-service","z":"d420ee28.a1795","name":"Set temperature","server":"6cc1c546.4430dc","version":1,"debugenabled":false,"service_domain":"modbus","service":"write_register","entityId":"","data":"{\"address\":2000,\"unit\":1,\"value\":\"{{payload}}\",\"hub\":\"hub1\"}","dataType":"json","mergecontext":"","output_location":"","output_location_type":"none","mustacheAltTags":false,"x":520,"y":320,"wires":[[]]},{"id":"49be9ca4.80aef4","type":"comment","z":"d420ee28.a1795","name":"Set Temperature to HRV","info":"","x":210,"y":280,"wires":[]},{"id":"2a011ba.bae88e4","type":"server-state-changed","z":"d420ee28.a1795","name":"active_temperature","server":"6cc1c546.4430dc","version":1,"exposeToHomeAssistant":false,"haConfig":[{"property":"name","value":""},{"property":"icon","value":""}],"entityidfilter":"sensor.hrv_active_temperature","entityidfiltertype":"exact","outputinitially":false,"state_type":"str","haltifstate":"","halt_if_type":"str","halt_if_compare":"is","outputs":1,"output_only_on_state_change":true,"x":790,"y":780,"wires":[["d9027d79.df8c7"]]},{"id":"d9027d79.df8c7","type":"function","z":"d420ee28.a1795","name":"","func":"\nreturn msg;","outputs":1,"noerr":0,"x":1020,"y":780,"wires":[["e1768475.c79418"]]},{"id":"e1768475.c79418","type":"api-call-service","z":"d420ee28.a1795","name":"Set desired_active_temperature","server":"6cc1c546.4430dc","version":1,"debugenabled":false,"service_domain":"input_number","service":"set_value","entityId":"input_number.hrv_temperature","data":"{\"value\":\"{{payload}}\"}","dataType":"json","mergecontext":"","output_location":"","output_location_type":"none","mustacheAltTags":false,"x":1250,"y":780,"wires":[[]]},{"id":"8849a34f.df6b4","type":"api-current-state","z":"d420ee28.a1795","name":"hrv_active_temperature","server":"6cc1c546.4430dc","version":1,"outputs":1,"halt_if":"","halt_if_type":"str","halt_if_compare":"is","override_topic":false,"entity_id":"sensor.hrv_active_temperature","state_type":"num","state_location":"payload","override_payload":"msg","entity_location":"data","override_data":"msg","blockInputOverrides":false,"x":810,"y":720,"wires":[["d9027d79.df8c7"]]},{"id":"ae5bc303.c2a4f","type":"api-current-state","z":"d420ee28.a1795","name":"active_user_mode","server":"6cc1c546.4430dc","version":1,"outputs":1,"halt_if":"","halt_if_type":"str","halt_if_compare":"is","override_topic":false,"entity_id":"sensor.hrv_active_user_mode","state_type":"str","state_location":"payload","override_payload":"msg","entity_location":"data","override_data":"msg","blockInputOverrides":false,"x":790,"y":480,"wires":[["7f43431e.622dfc"]]},{"id":"160ed3f2.3e675c","type":"api-current-state","z":"d420ee28.a1795","name":"active_fan_mode","server":"6cc1c546.4430dc","version":1,"outputs":1,"halt_if":"","halt_if_type":"str","halt_if_compare":"is","override_topic":false,"entity_id":"sensor.hrv_active_fan_mode","state_type":"str","state_location":"payload","override_payload":"msg","entity_location":"data","override_data":"msg","blockInputOverrides":false,"x":790,"y":600,"wires":[["1c190b23.960205"]]},{"id":"bde452f0.74f07","type":"server-events","z":"d420ee28.a1795","name":"","server":"6cc1c546.4430dc","event_type":"home_assistant_client","exposeToHomeAssistant":false,"haConfig":[{"property":"name","value":""},{"property":"icon","value":""}],"x":220,"y":600,"wires":[["57a15fbe.f93f6"]]},{"id":"57a15fbe.f93f6","type":"switch","z":"d420ee28.a1795","name":"","property":"payload","propertyType":"msg","rules":[{"t":"eq","v":"running","vt":"str"}],"checkall":"true","repair":false,"outputs":1,"x":410,"y":600,"wires":[["f44558b1.ee8f48"]]},{"id":"f44558b1.ee8f48","type":"delay","z":"d420ee28.a1795","name":"","pauseType":"delay","timeout":"10","timeoutUnits":"seconds","rate":"1","nbRateUnits":"1","rateUnits":"second","randomFirst":"1","randomLast":"5","randomUnits":"seconds","drop":false,"x":540,"y":600,"wires":[["ae5bc303.c2a4f","160ed3f2.3e675c","8849a34f.df6b4"]]},{"id":"6cc1c546.4430dc","type":"server","name":"Home Assistant","legacy":false,"addon":true,"rejectUnauthorizedCerts":true,"ha_boolean":"y|yes|true|on|home|open","connectionDelay":true,"cacheJson":true}]
HA (basic info):
Maybe someone will help us with graphical interface 
Hi! What modbus are you using?
Hi,
Iâm using Modbus TCP/IP.
Ethernet directly from the IAM gateway to my switch.
More or less the same as Modbus RTU except that Modbus RTU is a serial interface. Modbus addr. are the same. (there is some advantages using modbus TCP/IP, iâm not an expert, just mentioning it.).
If i didnât have the IAM gateway, i would use the Modbus RTU. But it all depends on whats easiest for each installation.
Bra jobb! 
Honestly I canât even call myself new in the HA community since I made an account several minutes ago 
I bumped into this topic when I tried to look into the possibility to connect IAM to Smartthings. The whole idea of even purchasing IAM is the possibility to hook it up to a movement/water sensor in bathroom so each time we take a shower ventilation goes automatically to Boost.
Systemair not offering something like this is very disturbing, and that cloud server is like an island, nothing outside can get connected to it. But Modbus is another option of course. However, Iâm kinda reluctant to spend over 2000 NOK (200âŹ) on a device if Iâm not going to use itâs main functionality, cloud!
So I was thinking something like a RS485 to Wifi adapter and connect it to that top JB plug, or even as simple as RS485 to ethernet RJ45 converter. Is this doable?
But Iâm long way from there! I guess first I have to read and master some basics of HA. Then actually install HA on Raspberry PI presumably and go forward from there.
Just an extremely noob question, you are able to control your vent on both HA Android app and Windows 10 app or web server? And no problem to integrate another sensor in the loop, like movement detecttor as mentioned?
As an automation engineer Iâm absolutely ashamed I have to ask such noob questions but you have to start somewhere!
Hi,
Welcome, Iâm quite a noob with HA myself but iâll try to help out:)
RS485 to Wifi
I have no experience using RS485 --> Wifi, but i see there there is RS485/Modbus --> Wifi/Ethernet converters, someone else may have experience? I would prefer wired interface, there is RS485â>USB converters available, which seems to be common to use. If i didnât have the IAM, the RS485â>USB would be my approach.
Other sensors
Iâm using netatmo ppm sensor and device tracker to control my VTR300, so there is no problem using other sensors to control the ventilation unit.
Humidity control
There is already a demand control in the unit where it uses itâs own humidity(RH) sensor by increasing the fan speed based on the RH setpoint vs actual RH, maybe that feature is good enough?
I was thinking of trying out that feature, but so far i dont find it nessecary in my case as the humidity from the bathrom already is vented quick and efficient without the humidity control enabled.
Remote control
Iâm using the Nabu Casa HA app for remote control, i dont mind paying 5 dollar a month for such a great free open source and well supported integration system, there is others ways to this free but you have to op en a port on your router. My HA runs inside Virtualbox on a 10 year old Win10 laptop, wich soon is to be relocated to a Intel Nuc with Linux and Ubuntu UI.
I hope that answers some of your questions.
Thatâs what I meant, Modbus RTU/RS485 to Modbus TCP/WiFi
Effectively, that should be the same thing as with IAM.
RS485 to USB converters are extremely cheap, maybe a bit inconvenient since Pi would have to be placed near the ventilation unit.
Btw. I decided to give IAM a chance and purchased it yesterday! Frankly quite dissapointed. Setup is super easy, however the cloud solution is average at best. Really slow refresh rate and quite basic. Itâs a totally closed system that doesnât let anything in/out, meaning, no possibility for 3rd pary sensor integration for programming an event based boost function. And if you wanât that, you need to set to Modbus/TCP but than you lose the cloud functionality that youâre actually paying such a hefty price for!
Thereâs no universe in which this thing is worth 200⏠and Iâm happily returning it early next week ⌠at least I got my FWâs updated
The RH sensor youâre refering to is placed on the exhaust (avtrekk) line. I tested this function and Iâm not sure if itâs good. In my case RH was ca 35% inside, with 50% (winter) setpoint. Checking the fan speed in rpm it was set to approx. low. Following some logic, it should measure both inside and outside RH, compare it with setpoint, and if you want to increase it, like in my case, auto mode should provide more flow and eventually lowering the setpoint for inlet air heating to prevent blowing somewhat dried air.
Thanks a lot! I see that I should start with some basics of HA first, for example I donât even know what API is! From programming languages, Iâm familiar with general concepts, C and PLC programming (in which Iâm very experienced), but thatâs a bit specific. Thatâs it, I donât have a clue about object based programming for example.
So, I have a huge wish to learn something and start actually making something useful, just need some time, not so easy with a small child and one more coming soon, but Iâll hope Iâll find some, because this looks like so much fun!
If you donât mind sharing, do you have background in coding? Or did you just start with it? I hope I can find all the things I need on HA page, not having to wonder arround.
Yes, you can retrieve the same data from both the RS485 serial interface and Modbus TCP using the IAM gateway. If only using the IAM cloud feature you will have âfullâ control and can change most parameters, functionality/features etc. so you will have more or less full control using the systemair app, but without any options as you say with integrating the system with other systems⌠If the app is running in the background and itâs being re-opened, the data/values was not updated, maybe that is fixed in the latest release, Iâm not sure since Iâm not using it.
It would expect that the built in humidity demand control regards the outdoor humidity as well (ref. modbus adr. List as its referring to calculated outdoor humidity as well), donât have more to say about the feature since Iâm not using it but I would expect at least the fan level to respond well in humidity changes to lower the indoor humidity.
Having the same background as you, both HA is and Node Red recently was totally new for me as well, the background is helping a lot. But itâs a new language to learn anyway, and yes itâs fun:) (but only if you have the time available).
If you check the post above from 2ând December 2020, you will get an idea of how the Modbus integration works in HA. Since I wanted to have HA to be updated if settings was updates locally on the unit panel I had to create automations for each parameter, which would result in a lot of automations (especially the Auto schedule integration), I decided to move the integration to node red (running as a HA addon) which I prefer when writing automations.
My ventilation unit is integrated and works well but I have a few more details to finish before the code I shared on github. Im a little to hung up in details and donât have much time available so it may take some timeâŚ
The main struggle is find the correct modbus registers to read, since the modbus adr. list has flaws⌠But that should be 98% sorted out now, now I need to find the registers for the Auto schedule Fan speed, though I had that, but that was wrong⌠And the timestamp of last filter change also has some strange behavior Iâm not figuring out, tried byteswapping the registers but it seems like the register isnât being updated when replacing the filter, maybe a bug or maybe it needs to be set by external command, not sure⌠(time to next filter change is OK) The timestamp issue is now solved by providing the actual timestamp when the filter alarm is deactivated and it logs the 10 latest filter changes with actual timestamp. Since Iâm a noob using Node Red there was a few things to figure out how to make this possible.The function node code (node red) is shared below, as I believe you are curious about that:)
This function node is triggered by falling edge using the filteralarm as input.
There is more, but it will be shared later some at some point.
I donât mind sharing the code (old HA config and latest Node Red config), send me a pm and Iâll send the code in return since itâs too much to share in the forum (not possible to share due to the sizeâŚ).
Filter timestamp code in HA: (edit post/forgot this)
Filter timestamp code in node red:
var Recent_change = global.get ("TimeNow_YearDateHour");
//Flytter siste filterskift til forrige filterskifte
var Previous_change_1 = flow.get ("vtr300_forrige_filterskift_0","storeInFile");
var Previous_change_2 = flow.get ("vtr300_forrige_filterskift_1","storeInFile");
var Previous_change_3 = flow.get ("vtr300_forrige_filterskift_2","storeInFile");
var Previous_change_4 = flow.get ("vtr300_forrige_filterskift_3","storeInFile");
var Previous_change_5 = flow.get ("vtr300_forrige_filterskift_4","storeInFile");
var Previous_change_6 = flow.get ("vtr300_forrige_filterskift_5","storeInFile");
var Previous_change_7 = flow.get ("vtr300_forrige_filterskift_6","storeInFile");
var Previous_change_8 = flow.get ("vtr300_forrige_filterskift_7","storeInFile");
var Previous_change_9 = flow.get ("vtr300_forrige_filterskift_8","storeInFile");
var Previous_change_10 = flow.get ("vtr300_forrige_filterskift_9","storeInFile");
var Previous_change_0 = flow.get ("vtr300_siste_filterskift","storeInFile");
//Initilialiser verdi dersom udefinert
if (typeof Previous_change_0 == "undefined") //Forrige_0
Previous_change_0 = 'Not set';
if (typeof Previous_change_1 == "undefined") //Forrige_1
Previous_change_1 = 'Not set';
if (typeof Previous_change_2 == "undefined") //Forrige_2
Previous_change_2 = 'Not set';
if (typeof Previous_change_3 == "undefined") //Forrige_3
Previous_change_3 = 'Not set';
if (typeof Previous_change_4 == "undefined") //Forrige_4
Previous_change_4 = 'Not set';
if (typeof Previous_change_5 == "undefined") //Forrige_5
Previous_change_5 = 'Not set';
if (typeof Previous_change_6 == "undefined") //Forrige_6
Previous_change_6 = 'Not set';
if (typeof Previous_change_7 == "undefined") //Forrige_7
Previous_change_7 = 'Not set';
if (typeof Previous_change_8 == "undefined") //Forrige_8
Previous_change_8 = 'Not set';
if (typeof Previous_change_9 == "undefined") //Forrige_9
Previous_change_9 = 'Not set';
if (typeof Previous_change_10 == "undefined") //Forrige_10
Previous_change_10 = 'Not set';
//Lagrer status til fil for ĂĽ beholde status "permanent"
flow.set("vtr300_forrige_filterskift_0", Previous_change_0,"storeInFile");
flow.set("vtr300_forrige_filterskift_1", Previous_change_1,"storeInFile");
flow.set("vtr300_forrige_filterskift_2", Previous_change_2,"storeInFile");
flow.set("vtr300_forrige_filterskift_3", Previous_change_3,"storeInFile");
flow.set("vtr300_forrige_filterskift_4", Previous_change_4,"storeInFile");
flow.set("vtr300_forrige_filterskift_5", Previous_change_5,"storeInFile");
flow.set("vtr300_forrige_filterskift_6", Previous_change_6,"storeInFile");
flow.set("vtr300_forrige_filterskift_7", Previous_change_7,"storeInFile");
flow.set("vtr300_forrige_filterskift_8", Previous_change_8,"storeInFile");
flow.set("vtr300_forrige_filterskift_9", Previous_change_9,"storeInFile");
flow.set("vtr300_forrige_filterskift_10", Previous_change_10,"storeInFile");
flow.set("vtr300_siste_filterskift", Recent_change,"storeInFile");
msg.payload = Previous_change_0;
return msg;
Thanks a lot!
Itâs funny how I understand in principle the stuff youâre talking about, but donât have a slightest clue about implementation ⌠if only it would be as âeasyâ as programming Siemens PLC hehe
I donât even have the slightest clue what âyamlâ and âcode redâ even means, so I guess I have a loong way to go, hope Iâll be able to find some time soon, we moved into the newbuilt house several weeks ago and now the things are starting to settle in place finally!
I do have some experience with both Modbus RTU/TCP but everything through S7/Tia Portal so basically you already get the user freindly blocks to connect. But really, in industrial/marine/offshore automation Profibus and more and more Ethernet are the way to go!
Thanks a lot for you willing to share the code! Iâm sure Iâll get back to you once I master the basics and have some clue
Oh! And one general tip regrding the vent unit filters. There is a guy I know that was working for one of those ventilation companies (canât remember which one but it was the one I had before in appartment, Flexit maybe?) and he revealed the dirty little secret, which I kinda already assumed.
You can wash/vacume/blow the filters and as long as the fabric is intact you can re-use them many many times over. It was allways suspicious to me why every single company is pointing out that they are one-time use ⌠well, for 50-60⏠it surely is a very lucrative business to them 
I think the same applies to Systemair.
And regarding Systemair, I find their business practices extremely lame! In order to connect wirelessly you need to spit out 200âŹ, their cloud is an island, closed system and their sulutions are quite lame as well! They do have a motion sensor, but guess what, only the wired option, for a hefy price of some 150⏠as I remember. And Modbus TCP functionality can be achieved with 20⏠adapter, Modbus RTU to USB for 1âŹ! And thatâs probably the way Iâll be aiming. Pi with HA on it could be placed on the top of vent unit, why not
Delivered power + energy & Outdoor compensated supply temperature:
Delivered power:
From i got the unit installed late last summer i somehow wondered how much power and energy the unit deliver compared to the power and enrgy it uses. After some googling it seemed like âSensible heatâ is a way of calculating delivered power, after some head scratching/Node Red learning i managed to make the calculations. This is a new area for me so id like to share my findings/way of estimate added power+energy and true added power+energy. I was looking for a estimate of how efficient the unit is, by that i have calculated estimated delivered kW/10s and accumulate kW/10s each 10 sec. To give the âtrue deliveredâ energy i just subtracted the energy consumption. Do anyone have the knowledge if âSensible heatâ and âEnergy consumptionâ is comparable?
Code etc. shared further below.
Ref. pictures below: The accumulation was not reset during last night and continued counting from yesterdays value because the Windows host rebooted at about 23:00 yesterday⌠Thats why the reset failed and there is a straight line in the trends. To be âfixedâ by relocating HA to Intel Nuc sometime in the future.
Outdoor compensated supply temperature:
Instead of manually setting the temperature setpoint Id like the supply temperature to be adjusted automatically according to outdoor temperature changes, its probably not gona have much to say with the indoor temperature but it will prevent the heat exchanger from running when itâs not nessecary and maybe extend its lifetime. So i did some plots on the calculator (Stat) and made the calculator find the formula and constants. Then some more head scratching/Node Red learning had to be done. What i want is to have the X and Y plots as temperature setpoints, does anyone know how this is achievable with Node Red?
Code below:
Delivered power:
// hs := cp*Ď*q*dt
// Eks.= (1.006 kJ/kg°C) (1.202 kg/m3) (1 m3/s) ((20°C) - (0°C))
//hs := sensible heat (kW)
//cp := specific heat of air (1.006 kJ/kg°C)
//p := density of air (1.202 kg/m3) or "press/(Rspecific*t)"
//q := air volume flow (m3/s)
//dt := delta temperature delta [°C]
//press := absolute pressure (Pa)
//t := absolute temperature (kelvin)
//Rspecific := specific gas constant for dry air (J/(kg'K)) [Rspec]
var q_pv = flow.get ("vtr300_tilluftsvifte_pv","default");
var t_supply = flow.get ("vtr300_tillufts_temperatur","default");
var t_inlet = flow.get ("vtr300_inntak_temp","default");
var press = 101325;
var t = t_inlet + 273.15;
var Rspec = 287;
// Sjekker for "isNotNumber, ved "isNan" (opretting av Modbus kom./feil sensor data) tidlig "exit" (prøv igjen).
if (isNaN(q_pv) || isNaN(t_supply) || isNaN(t_inlet) || isNaN(t)) {
return;
}
var cp = 1.006;
//var p = 1.202;
var p = press/(Rspec*t);
var q = (q_pv * 3)/3600;
var dt = t_supply - t_inlet;
var hs = cp*p*q*dt;
// Lagrer watt og kW til memory for videreberegning av faktisk levert estimert effekt
flow.set("vtr300_tilført_Watt", hs*1000,"default"); // Lagrer tilført kW til "memory/default"
flow.set("vtr300_tilført_kWatt", hs,"default"); // Lagrer tilført kW til "memory/default"
// Estimert levert effekt & energi total
var watt = {payload:(hs*1000).toFixed(0)};
var kW = {payload:(hs).toFixed(2)};
var kW_10s = {payload:(hs/360)}; // kW/10s
// Tilpasser desimaler for attribute visning i HA
flow.set("vtr300_tilført_Watt_formated", (hs*1000).toFixed(0) +' Watt',"default"); // Lagrer tilført kW til "memory/default"
flow.set("vtr300_tilført_kWatt_formated", (hs).toFixed(2) +' kW',"default"); // Lagrer tilført kW til "memory/default"
return [watt,kW,kW_10s];
Delivered energy:
// Polles hvert 10s pga. payload = "kW/10s"
var kW_10s = msg.payload;
var Previous_kWh_tot = flow.get ("vtr300_tilført_kWh_cnt_tot","default"); // Total eneregiteller - Flytter siste akkumulerte verdi til forrige verdi
var Previous_kWh_tot_daily = flow.get ("vtr300_tilført_kWh_cnt_tot_daily","default"); // Daglig energi
var Previous_kWh_tot_weekly = flow.get ("vtr300_tilført_kWh_cnt_tot_weekly","default"); // Ukentlig energi
var Previous_kWh_tot_monthly = flow.get ("vtr300_tilført_kWh_cnt_tot_monthly","default"); // Münedlig energi
var Previous_kWh_tot_yearly = flow.get ("vtr300_tilført_kWh_cnt_tot_yearly","default"); // Ă
rlig energi
var kWh_tot;
var kWh_tot_daily;
var kWh_tot_weekly;
var kWh_tot_monthly;
var kWh_tot_yearly;
// Totalteller energi - Initilialiser verdi dersom udefinert/første gang verdi settes
if (Previous_kWh_tot == undefined) {
kWh_tot = 0.0;
}
// Totalteller energi - Akkumulerer forrige verdi med ny verdi
else {
kWh_tot = Previous_kWh_tot + kW_10s;
}
// Daglig energi - Initilialiser verdi dersom udefinert/første gang verdi settes
if (Previous_kWh_tot_daily == undefined) {
kWh_tot_daily = 0.0;
}
// Daglig energi - Akkumulerer forrige verdi med ny verdi
else {
kWh_tot_daily = Previous_kWh_tot_daily + kW_10s;
}
// Ukentlig energi - Initilialiser verdi dersom udefinert/første gang verdi settes
if (Previous_kWh_tot_weekly == undefined) {
kWh_tot_weekly = 0.0;
}
// Ukentlig energi - Akkumulerer forrige verdi med ny verdi
else {
kWh_tot_weekly = Previous_kWh_tot_weekly + kW_10s;
}
// Münedlig energi - Initilialiser verdi dersom udefinert/første gang verdi settes
if (Previous_kWh_tot_monthly == undefined) {
kWh_tot_monthly = 0.0;
}
// MĂĽnedlig energi - Akkumulerer forrige verdi med ny verdi
else {
kWh_tot_monthly = Previous_kWh_tot_monthly + kW_10s;
}
// Ă
rlig energi - Initilialiser verdi dersom udefinert/første gang verdi settes
if (Previous_kWh_tot_yearly == undefined) {
kWh_tot_yearly = 0.0;
}
// Ă
rlig energi - Akkumulerer forrige verdi med ny verdi
else {
kWh_tot_yearly = Previous_kWh_tot_yearly + kW_10s;
}
//Oppdaterer med nyeste akkumulerte verdi (Scantid mĂĽ vĂŚre 10s pga. mottatt verdi er kW/10s)
flow.set("vtr300_tilført_kWh_cnt_tot", kWh_tot,"default"); // Total eneregiteller - Akkumulering i "memory/default", restore fra "file"
flow.set("vtr300_tilført_kWh_cnt_tot_daily", kWh_tot_daily,"default"); // Daglig energi - Akkumulert
flow.set("vtr300_tilført_kWh_cnt_tot_weekly", kWh_tot_weekly,"default"); // Ukentlig energi - Akkumulert
flow.set("vtr300_tilført_kWh_cnt_tot_monthly", kWh_tot_monthly,"default"); // Mý�nedlig energi - Akkumulert
flow.set("vtr300_tilført_kWh_cnt_tot_yearly", kWh_tot_yearly,"default"); // Ă
rlig energi - Akkumulert
var kW_10s_out = {payload:kW_10s};
var kWh_tot_daily_out = {payload:(kWh_tot_daily).toFixed(2)};
var kWh_tot_weekly_out = {payload:(kWh_tot_weekly).toFixed(2)};
var kWh_tot_monthly_out = {payload:(kWh_tot_monthly).toFixed(2)};
var kWh_tot_yearly_out = {payload:(kWh_tot_yearly).toFixed(2)};
var kWh_tot_out = {payload:(kWh_tot).toFixed(2)};
// Tilpasser desimaler og benevnelse for attribute visning i HA
flow.set("vtr300_tilført_kWh_cnt_tot_formated", (kWh_tot).toFixed(2) +' kWh',"default"); // Lagrer tilført kW til "memory/default"
flow.set("vtr300_tilført_kWh_cnt_tot_daily_formated", (kWh_tot_daily).toFixed(2) +' kWh',"default"); // Lagrer tilført kW til "memory/default"
flow.set("vtr300_tilført_kWh_cnt_tot_weekly_formated", (kWh_tot_weekly).toFixed(2) +' kWh',"default"); // Lagrer tilført kW til "memory/default"
flow.set("vtr300_tilført_kWh_cnt_tot_monthly_formated", (kWh_tot_monthly).toFixed(2) +' kWh',"default"); // Lagrer tilført kW til "memory/default"
flow.set("vtr300_tilført_kWh_cnt_tot_yearly_formated", (kWh_tot_yearly).toFixed(2) +' kWh',"default"); // Lagrer tilført kW til "memory/default"
//return [kW_10s_out,kWh_tot_daily_out,kWh_tot_weekly_out,kWh_tot_monthly_out,kWh_tot_yearly_out,kWh_tot_out];
True power:
var watts_consumption = msg.payload;
var Watt_delivered = flow.get ("vtr300_tilført_Watt","default");// Tilført effekt Watt estimert
var kWatt_delivered = flow.get ("vtr300_tilført_kWatt","default"); // Tilført effekt kW estimert
// Faktisk effekt produsert (produsert - levert)
var true_produced_Watts = Watt_delivered - watts_consumption;
var true_produced_kW = kWatt_delivered - (watts_consumption/1000);
// Faktisk effekt produsert, tilpasse data ut
var true_produced_Watts_out = {payload:(true_produced_Watts).toFixed(0)};
var true_produced_kW_out = {payload:(true_produced_kW).toFixed(2)};
return [true_produced_Watts_out,true_produced_kW_out];
Outdoor compensated supply temperature:
var x= msg.payload; // utetemp.
// X (ute temp) og Y (ønsket tilluft) plot:
// X1 :7,5, Y1 :22,0
// X2 :10,0, Y2 :20,0
// X3 :12,5, Y3 :18,0
// X4 :15,0, Y4 :17,0
// X5 :17,5, Y5 :15,0
// X6 :20,0, Y6 :15,0
//Fjerdgradslikning for best treff av X og Y plot
// đŚ=đđĽ^4+đđĽ^3+đđĽ^2+đđĽ+đ
// Graf & konstanter ses ved ĂĽ plotte X & Y pĂĽ kalkulator med "Stat"->"Grph"->"Gph"->"X^4"
//gitte variable basert pĂĽ X og Y plot:
var a = (1.0666e-03);
var b = (-0.0562962);
var c = (1.09555555);
var d = (-9.9465608);
var e = (55.3809523);
var y; //Ănsket tilluftstemp.
//Nødvendige regler for ønsket funksjosnalitet (pga. avvik utenfor ytterpunker)
if (x <= 7.5) {
y = 22.0;
}
else if (x >= 20.0) {
y= 15.0;
}
// Beregner plot
else {
y = (a * Math.pow(x, 4)+b*Math.pow(x, 3)+c*Math.pow(x,2)+d*x+e);
}
msg.payload = parseFloat((y).toFixed(1));
return msg;
