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Experience with Avatto WT200 Thermostat (50x50 mm) for European Standard Series?

io2345 3054 10
Best answers LABEL_AI_GENERATED

Can the Avatto WT200 thermostat be switched between normally closed and normally open mode so it can be used for both heating and cooling on the same underfloor heating circuit?

Yes, the thread suggests the WT200 can do that, because the original firmware/Home Assistant support already exposes a valve-type toggle and the Tuya DPS mappings are documented [#21109220] In practice, one unit that arrived was fitted with a WBR3 module (RTL8720CF), which is not supported in OBK yet, so Libretiny was suggested instead [#21109464] [#21111629] A shared ESPHome/TuyaMCU config for the similar WT100 shows the relevant datapoints and can be adapted to the WT200, including switch datapoint 1, target temperature 2, current temperature 3, child lock 9, sensor selection 110, backlight 106, and switching differential 101 [#21111833]
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  • Avatto WT200 supports normal open and closed modes

    #1 21102982
    io2345
    Level 10  
    Posts: 273
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    Does anyone yet have experience with Avatto WT200? A small thermostat that fits European standard electric appliance series (50x50 mm front size). Tuya smart life WiFi.
    Avatto WT200 thermostat with display and touch interface.

    The App says that you can switch logic from "normal closed" to "normal open", which would make it suitable for both heating and cooling usage on the same underfloor heating circuit. If cooling is activated, it should switch logic (has to be done in home automation software, of course). Smartphone settings screen for an app allowing switching logic between normally closed and normally open.

    I ordered two of them from Avatto official store, said to be here within a week. Let's see. Will post pictures from inside, if not yet available on this page.
    W pełni konfigurowalna automatyzacja domu - prezentacja Fox Wi-Fi Quad Input [sponsorowany]
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  • #2 21103586
    p.kaczmarek2
    Moderator Smart Home  
    Posts: 14771
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    It will be almost certainly TuyaMCU. We can support it fairly easily.

    I can order one as well. Let's see which one will arrive first and try to get that working with OBK. Hopefully it will be Beken.
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  • #3 21109220
    io2345
    Level 10  
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    >>21103586 Obviously there is already support for the device (with original firmware) in Home Assistant:
    https://github.com/make-all/tuya-local/issues/1166
    Contains also information about DPS mappings.
    Especially this data point is of interest for me: 常闭型_常开型","105"
    It changes the valve type from "Normal open" to "Normal closed"

  • Corrected Tuya datapoint mapping and asked about delivery

    #4 21109285
    p.kaczmarek2
    Moderator Smart Home  
    Posts: 14771
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    That's nice:
    Quote:

    Data points finding script result (from "Find Tuya Data Points" article):
    Code: JSON
    Log in, to see the code


    Added after 44 [seconds]:

    btw you copied datapoint incorrectly, you confused key-value order.
    Did you device arrive already?
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  • #5 21109391
    io2345
    Level 10  
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    >>21109285You're right, has to be 101.

    No, devices are still on their way. Custom clearance. Maybe until Saturday they will arrive.
  • #6 21109432
    p.kaczmarek2
    Moderator Smart Home  
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    Hopefully something supported by OBK will be inside. Still, it would be also good to get one based on ESP.
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  • #7 21109464
    insmod
    Level 31  
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    It's possible, that your device will arrive with WBR3, which is RTL8720CF and no support in OBK yet. You will have to flash libretiny. I can share my esphome WT100+ESP12F config, it should be similar enough for you to adjust.
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  • #8 21109605
    io2345
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    >>21109464
    Libretiny, never heard of that before. They seem to even support Beken-chips as well, right? Fork of ESPhome.

    Very probable that it is WBR3, the WT100 seems to have the same functions as WT200, just different housing. But, you never know with these Chinese guys ;-)
    So, let's just wait and see.
  • #9 21111629
    io2345
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    >>21109432 Arrived some minutes ago, and is indeed WBR3 (as suggested by @insmod). Probably not supported here, right?
    WBR3 electronic module mounted in a metal frame.

  • ESPhome YAML for WT-100 Tuya thermostat integration

    #10 21111833
    insmod
    Level 31  
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    Code: text Expand Select all Copy to clipboard
    
esphome:
  name: wt-100
  friendly_name: WT-100

esp8266:
  board: esp12e

logger:
  baud_rate: 0

uart:
  rx_pin: GPIO3
  tx_pin: GPIO1
  baud_rate: 9600

api:
  encryption:
    key: --

ota:
  password: --

wifi:
  networks:
    - ssid: !secret wifi_ssid
      password: !secret wifi_password
    - ssid: !secret wifi_ssid_second
      password: !secret wifi_password

  domain: .lan # OpenWrt
  
  ap:
    ssid: "Wt-100 Fallback Hotspot"
    password: !secret fallback_pwd

time:
  - platform: homeassistant
    id: homeassistant_time
    timezone: UTC

tuya:
  id: tuyamcu
  time_id: homeassistant_time

climate:
  - platform: tuya
    name: "Washroom floor"
    active_state:
      datapoint: 5
      heating_value: 1
    switch_datapoint: 1
    target_temperature_datapoint: 2
    target_temperature_multiplier: 0.1
    current_temperature_datapoint: 3
    current_temperature_multiplier: 0.1
    visual:
      temperature_step:
        target_temperature: 0.5
        current_temperature: 0.1
      min_temperature: 5 °C
      max_temperature: 60 °C

switch:
  - platform: restart
    name: Restart
  - platform: "tuya"
    name: "Child lock"
    switch_datapoint: 9
  - platform: "tuya"
    name: "Anti-freeze"
    switch_datapoint: 103
  - platform: "tuya"
    name: "Sound"
    switch_datapoint: 109

select:
  - platform: "tuya"
    tuya_id: tuyamcu
    name: "Sensor selection"
    enum_datapoint: 110
    options:
      0: Internal
      1: Floor
      2: Both
  - platform: "tuya"
    tuya_id: tuyamcu
    name: "Backlight"
    enum_datapoint: 106
    options:
      0: "Off"
      1: Micro-light
      2: Medium brightness
      3: Backlight highlight

number:
  - platform: "tuya"
    name: "Temperature compensation"
    number_datapoint: 19
    min_value: -9.9
    max_value: 9.9
    step: 0.1
    multiply: 10
  - platform: "tuya"
    name: "Switching differential"
    number_datapoint: 101
    min_value: 0.5
    max_value: 10
    step: 0.5
    multiply: 10

captive_portal:
    
web_server:
  local: true
  port: 80

    My config for WT100, change it to use wbr3 and adapt tuyamcu gpio pins + WT200 datapoints
  • #11 21835389
    andreasbergermeier
    Level 1  
    Posts: 0
    Hey there,
    I got one of those recently. The current version comes with a CB3S Module.
    Does anybody know if I can flash that one without desoldering?
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Topic summary

LABEL_AI_GENERATED
Discussion about the Avatto WT200 compact thermostat for European 50x50 mm wall series, intended for Tuya/Smart Life Wi‑Fi control and potentially usable for both heating and cooling by switching the valve logic between normally closed and normally open. Early replies identified it as likely a TuyaMCU-based device and suggested support in OBK/OpenBeken might be possible. Later, Home Assistant Tuya-local support was found, including DPS mapping details for the valve-type setting. The ordered unit arrived with a WBR3 module, later another user reported a newer version with a CB3S module and asked about flashing without desoldering. ESPHome, LibreTiny, and Tuya climate configuration examples were discussed as possible integration paths.
AI summary based on the discussion. May contain errors.
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