TV05 themostat radiator valve & heat demand bridge

Integrate the smart thermostats TV05 into your heating installation.

*** under construction ***

Issue to solve the cheap smart thermostats are intended to only heat a room when there is a heat demand. Unfortunately, these thermostats do not have the option to transmit the heat demand to the heating system. As a result, the thermostat in the living room must always have a heat demand in order to heat the rest of the house. The smart thermostats that are currently popular do not have the option to switch on the heat demand. In this project I converted the heat demand into a simple and cheap bridge for home assistant. Together with some automation in Home Assistant, each thermostat switches on the heating system when there is a heat demand. Because the heat demand bridge is connected in parallel to the existing thermostat, a fallback in the event of Home Assistant failure is arranged.

Thermostat TV05 Zigbee gateway via Tuya(SmartLife)


Reset thermstat

Beware: reset only works if display is on!

Error codes

Automation architecture

The heat demand bridge

Script ESPHome yaml

esphome:
  name: cv-warmtevraag
  friendly_name: cv-warmtevraag

esp8266:
  board: esp01_1m

# Enable logging
logger:

# Enable Home Assistant API
api:
  encryption:
    key: "********************************************"

ota:
  password: "*********************************"

wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Cv-Warmtevraag Fallback Hotspot"
    password: "***********"

captive_portal:
  
output:
  - platform: esp8266_pwm
    pin: GPIO2
    id: onboard_led

light:
  - platform: monochromatic
    name: "Onboard LED"
    output: onboard_led

switch:
  - platform: gpio
    name: "Relay"
    pin: GPIO0

Automation yaml for each thermostat

Trigger: This automation is triggered by a state change in the entity climate.hal. It means that the automation will be executed whenever the state of the specified thermostat (climate.hal) changes.

Actions Execute Script:

Invokes script heat demand

Conditional Actions: for test only

The script includes a conditional block (if) that checks whether the current temperature of the thermostat (climate.hal) is less than the target temperature. If the condition is true: Sends a notification to a mobile app stating that the thermostat has a warmth demand. It includes information about the current and target temperatures. If the condition is false: Sends a notification to a mobile app stating that the thermostat does not have a warmth demand. It includes information about the current and target temperatures. Enabled:

The enabled: false statement indicates that this automation is currently disabled. If you want it to be active, you can set enabled: true.

Cut&Paste this script in a new automation with the yaml editor

alias: Warmtevraag thermostaten - Trigger
description: Warmtevraag thermostaten - Trigger
trigger:
  - platform: state
    entity_id:
      - climate.hal
      - climate.vincent
      - climate.thermostaat_voorkamer
      - climate.thermostaat_keuken
      - climate.julia
      - climate.logeer
      - climate.werkkamer
      - climate.pelikaan_slaapkamer_boven_none
action:
  - service: script.1704921864856
    data: {}

Script heat demand

No Warmth Demand (First Branch):

Conditions: An AND condition is used to check if all the specified thermostats have their current temperature greater than or equal to the target temperature. Sequence: For test only: Sends a notification to a mobile app, stating that thermostats have no warmth demand. Turns OFF the heat demand bridge switch

Warmth Demand Detected (Second Branch):

Conditions: An OR condition is used to check if any of the specified thermostats have their current temperature less than the target temperature. Sequence: For test only: Sends a notification to a mobile app, stating the number of thermostats that have a warmth demand. The count is based on the number of thermostats with the current temperature less than the target temperature. Turns ON the heat demand bridge switch

Cut&Paste this script in a new script with the yaml editor

alias: Warmtevraag V3
sequence:
  - choose:
      - conditions:
          - condition: and
            conditions:
              - condition: template
                value_template: >-
                  {{ state_attr('climate.hal', 'current_temperature') >=
                  state_attr('climate.hal', 'temperature') }}
              - condition: template
                value_template: >-
                  {{ state_attr('climate.julia', 'current_temperature') >=
                  state_attr('climate.julia', 'temperature') }}
              - condition: template
                value_template: >-
                  {{ state_attr('climate.vincent', 'current_temperature') >=
                  state_attr('climate.vincent', 'temperature') }}
              - condition: template
                value_template: >-
                  {{ state_attr('climate.logeer', 'current_temperature') >=
                  state_attr('climate.logeer', 'temperature') }}      
              - condition: template
                value_template: >-
                  {{ state_attr('climate.werkkamer', 'current_temperature') >=
                  state_attr('climate.werkkamer', 'temperature')
                  }}                        
              - condition: template
                value_template: >-
                  {{ state_attr('climate.thermostaat_voorkamer',
                  'current_temperature') >=
                  state_attr('climate.thermostaat_voorkamer', 'temperature')
                  }}         
              - condition: template
                value_template: >-
                  {{ state_attr('climate.thermostaat_keuken',
                  'current_temperature') >=
                  state_attr('climate.thermostaat_keuken', 'temperature') }}  
              - condition: template
                value_template: >-
                  {{ state_attr('climate.pelikaan_slaapkamer_boven_none',
                  'current_temperature') >=
                  state_attr('climate.pelikaan_slaapkamer_boven_none',
                  'temperature') }}                    
        sequence:
          - type: turn_off
            device_id: be319c0f01549bcd36540820b476d9f7
            entity_id: 97f7d5ec8726146ec8fba483d375b749
            domain: light
            enabled: false
          - type: turn_off
            device_id: 35f12613a862ddb2f36de40e6771fdd1
            entity_id: af4924c232cc8f702d298610b3a05315
            domain: switch
      - conditions:
          - condition: or
            conditions:
              - condition: template
                value_template: >-
                  {{ state_attr('climate.hal', 'current_temperature') <
                  (state_attr('climate.hal', 'temperature') - 0.5) }}
              - condition: template
                value_template: >-
                  {{ state_attr('climate.julia', 'current_temperature') <
                  (state_attr('climate.julia', 'temperature') - 0.5) }}
              - condition: template
                value_template: >-
                  {{ state_attr('climate.vincent', 'current_temperature') <
                  (state_attr('climate.vincent', 'temperature') - 0.5)
                  }}        
              - condition: template
                value_template: >-
                  {{ state_attr('climate.logeer', 'current_temperature') <
                  (state_attr('climate.logeer', 'temperature') - 0.5)
                  }}                 
              - condition: template
                value_template: >-
                  {{ state_attr('climate.werkkamer', 'current_temperature') <
                  (state_attr('climate.werkkamer', 'temperature') - 0.5)
                  }}                                   
              - condition: template
                value_template: >-
                  {{ state_attr('climate.thermostaat_voorkamer',
                  'current_temperature') <
                  (state_attr('climate.thermostaat_voorkamer', 'temperature') -
                  0.5) }}   
              - condition: template
                value_template: >-
                  {{ state_attr('climate.thermostaat_keuken',
                  'current_temperature') <
                  (state_attr('climate.thermostaat_keuken', 'temperature') -
                  0.5) }}  
              - condition: template
                value_template: >-
                  {{ state_attr('climate.pelikaan_slaapkamer_boven_none',
                  'current_temperature') <
                  (state_attr('climate.pelikaan_slaapkamer_boven_none',
                  'temperature') - 0.5) }}                    
        sequence:
          - type: turn_on
            device_id: be319c0f01549bcd36540820b476d9f7
            entity_id: 97f7d5ec8726146ec8fba483d375b749
            domain: light
            enabled: false
          - type: turn_on
            device_id: 35f12613a862ddb2f36de40e6771fdd1
            entity_id: af4924c232cc8f702d298610b3a05315
            domain: switch
          - type: turn_on
            device_id: 4def715fe61ce4b3f34245cc03af54ae
            entity_id: def13460ab8a7f3c861ed1c70ba8be49
            domain: switch
  - if:
      - condition: template
        value_template: |2-
             {{ state_attr('climate.thermostaat_voorkamer',
                            'current_temperature') <
                            state_attr('climate.thermostaat_voorkamer', 'temperature') }}
    then:
      - type: turn_on
        device_id: 28fa5a1751d642bed33898428fc3ea86
        entity_id: 0ab5bfb4f3b8a4699c2401ac7730c103
        domain: switch
    else:
      - delay:
          hours: 0
          minutes: 5
          seconds: 0
          milliseconds: 0
        enabled: false
      - type: turn_off
        device_id: 28fa5a1751d642bed33898428fc3ea86
        entity_id: 0ab5bfb4f3b8a4699c2401ac7730c103
        domain: switch
  - if:
      - condition: template
        value_template: |2-
             {{ state_attr('climate.thermostaat_keuken',
                            'current_temperature') <
                            (state_attr('climate.thermostaat_keuken', 'temperature') -
                            0.5) }}
    then:
      - type: turn_on
        device_id: d650ce16cd8c48748fef09c6b19b2381
        entity_id: 6f3531d5df687e5493596a2eda84bb36
        domain: switch
    else:
      - delay:
          hours: 0
          minutes: 5
          seconds: 0
          milliseconds: 0
        enabled: false
      - type: turn_off
        device_id: d650ce16cd8c48748fef09c6b19b2381
        entity_id: 6f3531d5df687e5493596a2eda84bb36
        domain: switch
        enabled: false
mode: single

Issues
Holiday temperature: periode must be set! I set the periode to 10 years.
Reset at the knob only works if display is on!
Don't forget to change the default schedule.