DETA Grid Connect Smart Switch Single Gang Two-Way (6951HA)

Overview

The DETA Smart Switch Single Gang Two-Way (6951HA) is part of the Grid Connect ecosystem, and is sold at Bunnings in Australia.

Also known as:

• Smart Single Gang 2 Way Touch Light Switch (Deta website)
• Single Gang 2 Way Touch Light Switch (Grid Connect website)

Variations

As shown on the front of the packet.

Variation	Microcontroller	Board	Firmware	Flashing methods
Series 1	Beken BK7231T	Tuya WB3S	v1.1.5	Cloudcutter

Setup Guide

Cloudcutter

Cloudcutter is a tool designed to simplify the flashing process. Follow the official guide for instructions.

You can use the “Lonsonho” brand “X801A 1-Gang Switch” option in Cloudcutter.

Manual Flashing

Manual Flashing has not been tested on this specific model, but other models with the same chip have been tested and these manual steps work, you'll need a USB to serial adapter. Follow the disassembly steps below:

1. Remove the front plastic face.
2. Unscrew the two exposed screws.
3. Remove the clear panel and the small PCB underneath.

Tip: You can convert these switches to ESPHome by replacing the WB3S chip with an ESP-12E or ESP-12F chip and adding a 10k pull-down resistor on GPIO15.

GPIO Pinouts

Series 1 (WB3S) GPIO Pinouts

See Pinouts on WB3S Module Datasheet for more detail

Pin	Function
P24	Status LED (inverted)
P26	Button (inverted)
P14	Relay and Button LED
P8	Light activation status, taking into account the local activation (this device) xor the remote activation (another device) (inverted)

Note: Each relay shares a pin with its associated LED.

Advanced Modifications

To gain individual control of button LEDs, remove specific diodes and solder a wire from the cathode side of the diode pad to a spare GPIO pin. See this example.

Configuration Examples

Series 1 (WB3S) Configuration Examples

substitutions:
  device_name: "deta-2-way-1-gang-switch"

  friendly_name: "DETA 2 Way 1 Gang Switch"
  light_1_name: "${friendly_name}"
  light_1_icon: "mdi:light-recessed"

esphome:
  name: ${device_name}
  friendly_name: ${friendly_name}

bk72xx:
  board: wb3s

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

logger:

status_led:
  pin:
    number: P24
    inverted: true

light:
  - platform: binary
    output: filter_1
    id: light_1
    name: "${light_1_name}"
    icon: "${light_1_icon}"

binary_sensor:
  # Buttons
  - platform: gpio
    id: button_1
    pin:
      number: P26
      inverted: true
      mode: INPUT_PULLUP
    on_press:
      then:
        - light.toggle: light_1
    internal: true

  # Activation statuses
  # Represents the "local" relay (this device) XOR the "remote" relay (another device).
  # It only shows TRUE if one of the "local" or "remote" relays are active, but not both.
  - platform: gpio
    id: activation_status_1
    pin:
      number: P8
      mode: INPUT
      inverted: true
    internal: true

switch:
  # Relay
  - platform: gpio
    id: relay_1
    pin: P14
    internal: true

output:
  # Filters
  # Triggered when the "light" entity is turned on or off. Will only toggle
  # the associated relay if the "light" entity is out of sync with the
  # "activation status"; otherwise do nothing as the state is already correct.
  - platform: template
    type: binary
    id: filter_1
    write_action:
      then:
        - if:
            condition:
              - lambda: "return state != id(activation_status_1).state;"
            then:
              - switch.toggle: relay_1

Add Reboot button to HA

switch:
  - platform: restart
    name: ${friendlyname} REBOOT