Flashing

Tuya-Convert is the more convenient option for installing Tasmota but it is possible to flash over serial.

When flashing using Tuya-Convert press and hold 45°C button for 5 seconds to enter fast flashing mode and follow the normal tuya-convert procedure.

When flashing via serial connection remember to pull the MCU Reset Pin to ground. It’s a HR7P169BFGSF from Easysoft so pin 4 must be connected to ground.

Functions

MCU Product ID: {“p”:”h6MjwrnldNTu4kX3”,”v”:”1.0.0”,”m”:1}

dpID 101 controls kettle modes (corresponds to device buttons)

• 0 - heat to 45°C then maintain temperature for 2 hours
• 1 - heat to 60°C then maintain temperature for 2 hours
• 2 - heat to 85°C then maintain temperature for 2 hours
• 3 - heat to 100°C then maintain temperature for 3 minutes
• 4 - heat to 100°C (power button flashing when active)
• 5 - heat to preset temperature (70°C by default, can be changed using dpID 102) then maintain temperature for 2 hours (keep warm button)
• 6 - reset any running program and enter standby mode (pulsating power button)

dpID 102 sets water temperature for mode 5 (keep warm button), recommended 35 - 100 range

dpID 104 error notification:

• 0x00 - no error
• 0x01 - kettle empty
• 0x04 - kettle overheated due to too much or too little water

dpID 105 reports current water temperature

dpID 106 reports kettle status:

• 1 - kettle removed from base
• 2 - standby mode
• 3 - heating to programmed target temperature
• 4 - cooling down to programmed target temperature
• 5 - maintaining programmed target temperature

dpID 107 reports approximate time until programmed target temperature is reached or remaining time for maintaining programmed target temperature when in mode 5. Cannot be changed!

dpID 108 is still unknown, it is always reporting 5 and doesn’t respond to any of the TuyaSend commands.

Configuration

After applying the template and configuring Wi-Fi and MQTT the preconfigured relay will not control anything.

For controlling the kettle modes you’ll have to use the TuyaSend command:

• TuyaSend4 101,0 - 45°C
• TuyaSend4 101,1 - 60°C
• TuyaSend4 101,2 - 85°C
• TuyaSend4 101,3 - 100°C
• TuyaSend4 101,4 - 100°C without maintaining temp
• TuyaSend4 101,5 - keep warm
• TuyaSend4 101,6 - standby mode and reset if running a program It is required to use 101,6 if you want to switch from one temperature to another.

Set target temperature with:

TuyaSend2 102,<value>

or

TuyaMCU 21,102 to use dimmer to set temperature. With this you can use the slider or Dimmer command and it will prevent you from accidentally setting temperatures higher than 100°C. Might potentially create issues if you don’t have another relay configured.

If you don’t have an external solution for easy control you can map a dummy relay for controlling kettle modes and link them with TuyaSend using rules. States will not be in sync if controlled with other means. Set PowerOnState 0 to avoid weirdness on device reset. Example: Use preconfigured Relay1 to activate 45°C mode.

Rule ON Power1#State=1 DO TuyaSend4 101,0 ENDON ON Power1#State=0 DO TuyaSend4 101,6 ENDON

Send water temperature to an MQTT topic:

Rule ON TuyaReceived#DpType2Id105 DO Publish stat/%topic%/TEMPERATURE %value% ENDON

Override device button action and TuyaSend4 101,x command. Has a minor side effect of multiple beeps. Example overrides 45°C (mode 0) and instead controls another Tasmota light.

Rule ON TuyaReceived#DpType4Id101=0 DO Backlog TuyaSend4 101,6; Publish cmnd/coffee_light/POWER toggle ENDON 

Put kettle in standby mode when keep warm timer reaches 110 minutes aka keep warm function lasts only 10 minutes now.

Rule ON TuyaReceived#DpType2Id107=110 DO TuyaSend4 101,6 ENDON

I’m using this rule because I mostly heat water to custom temps with mode 5 and I don’t need the kettle to keep heating the water for the next 2 hours.

TuyaMCU 11,108 sets the relay to dpID 108 which avoids superfluous MCU messages that are sent when issuing a command to a nonexistent dpID.

Home Assistant Configuration

This implementation is suited to my specific needs and should serve as a blueprint, not a definite solution.

First set SetOption66 1 to enable sending all TuyaReceived data over MQTT!

sensor:

- platform: mqtt
  name: "Kettle Temperature"
  state_topic: "tele/kettle/RESULT"
  value_template: >
    {% if value_json.TuyaReceived is defined and value_json['TuyaReceived'].DpType2Id105 is defined %}
        {{ value_json['TuyaReceived'].DpType2Id105 }}
    {% else %}
        {{ states('sensor.kettle_temperature') }}
    {% endif %}
  unit_of_measurement: "°C"
  availability_topic: "tele/kettle/LWT"
  payload_available: "Online"
  payload_not_available: "Offline"
  device_class: temperature

- platform: mqtt
  name: "Kettle Time Remaining"
  state_topic: "tele/kettle/RESULT"
  value_template: >
    {% if value_json.TuyaReceived is defined and value_json['TuyaReceived'].DpType2Id107 is defined %}
        {{ value_json['TuyaReceived'].DpType2Id107 | int }}
    {% elif is_state('sensor.kettle_status', 'Standby') %}
        0
    {% else %}
      {{ states('sensor.kettle_time_remaining') | int }}
    {% endif %}
  unit_of_measurement: "min"
  availability_topic: "tele/kettle/LWT"
  payload_available: "Online"
  payload_not_available: "Offline"
  icon: mdi:timer

- platform: mqtt
  name: "Kettle Status"
  state_topic: "tele/kettle/RESULT"
  availability_topic: "tele/kettle/LWT"
  payload_available: "Online"
  payload_not_available: "Offline"
  value_template: >
    {% if value_json.TuyaReceived is defined and value_json['TuyaReceived'].DpType4Id106 is defined %}
    {% if value_json['TuyaReceived'].DpType4Id106 == 1 %}
        Kettle removed
    {% elif value_json['TuyaReceived'].DpType4Id106 == 2 %}
        Standby
    {% elif value_json['TuyaReceived'].DpType4Id106 == 3 %}
        Heating water
    {% elif value_json['TuyaReceived'].DpType4Id106 == 4 %}
        Cooling down
    {% elif value_json['TuyaReceived'].DpType4Id106 == 5 %}
        Maintaining temperature
    {% endif %}
    {% else %}
        {{ states('sensor.kettle_status') }}
    {% endif %}
  icon: mdi:kettle-steam

  - platform: mqtt
  name: "Kettle Error"
  state_topic: "tele/kettle/RESULT"
  availability_topic: "tele/kettle/LWT"
  payload_available: "Online"
  payload_not_available: "Offline"
  value_template: >
    {% if value_json.TuyaReceived is defined and value_json['TuyaReceived'].DpType5Id104 is defined %}
    {% if value_json['TuyaReceived'].DpType5Id104 == "0x00" %}
    OK
    {% elif value_json['TuyaReceived'].DpType5Id104 == "0x01" %}
    Empty
    {% elif value_json['TuyaReceived'].DpType5Id104 == "0x04" %}
    Overheated
    {% endif %}
    {% else %}
    {{ states('sensor.kettle_error') }}
    {% endif %}
  icon: mdi:kettle-alert

Switch is created to easily turn the kettle off and read whether its running or in standby for automations. Change “payload_on” to your favorite mode.

switch:

- platform: mqtt
  name: "Kettle"
  state_topic: "tele/kettle/RESULT"
  value_template: >
    {% if value_json.TuyaReceived is defined and value_json['TuyaReceived'].DpType4Id106 is defined %}
    {% if value_json['TuyaReceived'].DpType4Id106 <= 2 %}
        OFF
    {% elif value_json['TuyaReceived'].DpType4Id106 >= 3 %}
        ON
    {% endif %}
    {% endif %}
  state_on: "ON"
  state_off: "OFF"
  command_topic: "cmnd/kettle/TuyaSend4"
  payload_on: "101,4"
  payload_off: "101,6"
  availability_topic: "tele/kettle/LWT"
  payload_available: "Online"
  payload_not_available: "Offline"
  retain: false
  icon: mdi:kettle
  qos: 1

Create a modular “switch” where input select triggers automation for complete control.

input_select:

kettle_set:
  name: Set Kettle Mode
  options:
      - 'Keep Warm 45C :101,0'
      - 'Keep Warm 60C :101,1'
      - 'Keep Warm 85C :101,2'
      - 'Keep Warm 100C :101,3'
      - 'Quick 100C :101,4'
      - 'Keep Warm Custom :101,5'
      - 'Standby :101,6'

automation:

- id: turn on kettle mode
  initial_state: true
  alias: Turn on Kettle Mode
  trigger:
  - entity_id: input_select.kettle_set
    platform: state
  action:
      service: mqtt.publish
      data_template:
        topic: 'cmnd/kettle/TuyaSend4'
        payload: > 
          {% set dta = trigger.to_state.state %}
          {{dta.split(':')[1]}}

Set temperature where input number triggers an automation.

input_number:

kettle_temp:
  name: Kettle Temperature
  initial: 95
  min: 35
  max: 100
  step: 1
  unit_of_measurement: "°C"

automations:

- id: set kettle temperature
  initial_state: true
  alias: Set Kettle Temperature
  trigger:
  - entity_id: input_number.kettle_temp
    platform: state
  action:
      service: mqtt.publish
      data_template:
        topic: 'cmnd/kettle/TuyaSend2'
        payload: "102,{{ trigger.to_state.state | int }}"

by sthope and blakadder