tuya-local/custom_components/tuya_local/devices/zx_gs21_gasmonitor.yaml

name: Gas leak detector
products:
  - id: ozcdjaqrxauonq1f
    name: ZX-GS21
primary_entity:
  entity: sensor
  name: Gas leak
  category: diagnostic
  dps:
    - id: 2
      type: integer
      name: sensor
      unit:  "%LEL"
      class: measurement
    - id: 1
      type: string
      name: gas_state
secondary_entities:
  - entity: number
    name: Alarm duration
    category: config
    icon: "mdi:timer"
    dps:
      - id: 7
        type: integer
        name: value
        unit: min
        range:
          min: 0
          max: 60
  - entity: button
    name: Self check
    category: config
    dps:
      - id: 8
        type: boolean
        name: button
      - id: 9
        type: string
        name: result
  - entity: binary_sensor
    name: Preheat
    class: heat
    category: diagnostic
    dps:
      - id: 10
        type: boolean
        name: sensor
  - entity: binary_sensor
    name: Lifecycle
    category: diagnostic
    dps:
      - id: 12
        type: boolean
        name: sensor
  - entity: switch
    name: Silent
    category: config
    dps:
      - id: 16
        type: boolean
        name: switch
  - entity: binary_sensor
    name: Carbon monoxide alarm
    class: 
    category: diagnostic
    dps:
      - id: 18
        type: string
        name: sensor
        mapping:
          - dps_val: alarm
            value: true
          - value: false
  - entity: sensor
    name: Carbon monoxide
    class: carbon_monoxide
    category: diagnostic
    dps:
      - id: 19
        type: integer
        name: sensor
        unit: ppm
        class: measurement
      - id: 18
        type: string
        name: alarm_state