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Deta Grid Connect Smart Fan Speed Controller with Touch Light Switch

Deta Grid Connect Smart Fan Speed Controller with Touch Light Switch

Device Type: switch
Electrical Standard: au
Board: bk72xx

General Information

Deta 6914HA is a smart fan controller with light switch sold in Australia and New Zealand.

Series 1

Original version uses ESP8266 controller.

Series 2

Newer revision uses BK7231T controller on the Tuya WB3S module.

GPIO Pinout

ESP8266 Version

GPIO #Component
GPIO00Button2
GPIO01None
GPIO02None
GPIO03LedLink
GPIO04Relay3
GPIO05Button3
GPIO09None
GPIO10None
GPIO12None
GPIO13Relay2
GPIO14Relay1
GPIO15Relay4
GPIO16Button1
FLAGNone

BK72xx Version

Pin #Component
P14Button1
P1Button2
P8Button3
P10Led
P26Light Relay
P6Fan Relay 1
P7Fan Relay 2
P9Fan Relay 3

Getting it up and running

Series 1 - Tuya Convert

These switches are Tuya devices, so if you don't want to open them up to flash directly, you can attempt to use tuya-convert to initially get ESPHome onto them however recently purchased devices are no longer Tuya-Convert compatible. There's useful guide to disassemble and serial flash similar switches here. After that, you can use ESPHome's OTA functionality to make any further changes.

  • Put the switch into "smartconfig" / "autoconfig" / pairing mode by holding any button for about 5 seconds.
  • The status LED (to the side of the button(s)) blinks rapidly to confirm that it has entered pairing mode.

Series 2 - Cloudcutter

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

Manual Flashing

If you prefer to flash manually, you'll need a USB to serial adapter. Follow the disassembly steps below:

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

Configuration Examples

Series 1 (ESP8266)

substitutions:
device_name: deta_fan_controller
friendly_name: "Deta Smart Fan Speed Controller"
##########################
esphome:
name: ${device_name}
platform: ESP8266
board: esp01_1m
esp8266_restore_from_flash: true
wifi:
ssid: !secret iot_wifi_ssid
password: !secret iot_wifi_pwd
fast_connect: on
ap:
ssid: ${device_name} Fallback
password: ""
captive_portal:
sensor:
- platform: wifi_signal
name: ${friendly_name} Wifi Signal Strength
update_interval: 60s
- platform: uptime
name: ${friendly_name} Uptime
text_sensor:
- platform: wifi_info
ip_address:
name: ${friendly_name} IP
ssid:
name: ${friendly_name} SSID
bssid:
name: ${friendly_name} BSSID
mac_address:
name: ${friendly_name} Mac
logger:
api:
ota:
web_server:
port: 80
light:
- platform: binary
output: relay_light
id: light1
name: ${friendly_name} Light
status_led:
pin:
number: GPIO3
inverted: True
output:
- platform: gpio
id: relay_light
pin: GPIO14
- platform: template
id: fan_speed
type: float
write_action:
- then:
- if:
condition:
lambda: return ((state > 0) && (state < .4));
then:
- switch.turn_on: relay_fan_1
- delay: 20ms
- switch.turn_off: relay_fan_2
- delay: 20ms
- switch.turn_off: relay_fan_3
- if:
condition:
lambda: return ((state > .4) && (state < .7));
then:
- switch.turn_on: relay_fan_1
- delay: 20ms
- switch.turn_off: relay_fan_2
- delay: 20ms
- switch.turn_on: relay_fan_3
- if:
condition:
lambda: return (state > .7);
then:
- switch.turn_on: relay_fan_1
- delay: 20ms
- switch.turn_on: relay_fan_2
- delay: 20ms
- switch.turn_on: relay_fan_3
- if:
condition:
lambda: return (state < 0.01);
then:
- switch.turn_off: relay_fan_1
- delay: 20ms
- switch.turn_off: relay_fan_2
- delay: 20ms
- switch.turn_off: relay_fan_3
binary_sensor:
- platform: gpio
id: fan_light_sensor
pin:
number: GPIO16
mode: INPUT
inverted: True
on_press:
- light.toggle: light1
- platform: gpio
id: fan_power_sensor
pin:
number: GPIO00
mode: INPUT
inverted: True
on_press:
then:
- fan.toggle: fan_1
- platform: gpio
id: fan_speed_sensor
pin:
number: GPIO05
mode: INPUT
inverted: True
on_press:
then:
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_off: relay_fan_2
- switch.is_off: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 2
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_on: relay_fan_2
- switch.is_off: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 3
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_on: relay_fan_2
- switch.is_on: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 1
fan:
- platform: speed
id: fan_1
output: fan_speed
name: ${friendly_name} Fan Speed
speed_count: 3
switch:
- platform: restart
name: ${friendly_name} REBOOT
- platform: gpio
id: relay_fan_1
pin: GPIO13
- platform: gpio
id: relay_fan_2
pin: GPIO04
- platform: gpio
id: relay_fan_3
pin: GPIO15
- platform: template
id: update_fan_speed
optimistic: True
turn_on_action:
then:
- delay: 200ms
- if:
condition:
and:
- switch.is_off: relay_fan_1
- switch.is_off: relay_fan_2
- switch.is_off: relay_fan_3
then:
- fan.turn_off: fan_1
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_off: relay_fan_2
- switch.is_off: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 1
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_on: relay_fan_2
- switch.is_off: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 2
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_off: relay_fan_2
- switch.is_on: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 3

Series 2 (BK72xx)

substitutions:
devicename: "deta-switchfan"
friendlyname: Deta Switch Fan
deviceid: deta-switchfan
devicemodel: Deta Grid Connect 6914HA Series 2
#################################
esphome:
name: ${devicename}
bk72xx:
board: generic-bk7231t-qfn32-tuya
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
ap:
ssid: "ESPHOME"
password: "123456"
logger:
web_server:
captive_portal:
api:
ota:
sensor:
- platform: wifi_signal
name: ${friendlyname} Wifi Signal Strength
update_interval: 60s
- platform: uptime
name: ${friendlyname} Uptime
text_sensor:
- platform: wifi_info
ip_address:
name: ${friendlyname} IP
ssid:
name: ${friendlyname} SSID
bssid:
name: ${friendlyname} BSSID
mac_address:
name: ${friendlyname} Mac
- platform: version
name: ${friendlyname} ESPHome Version
#################################
status_led:
pin:
number: P10
inverted: true
light:
- platform: binary
output: relay_light
id: light1
name: ${friendlyname} Light
output:
- platform: gpio
id: relay_light
pin: P26
- platform: template
id: fan_speed
type: float
write_action:
- then:
- if:
condition:
lambda: return ((state > 0) && (state < .4));
then:
- switch.turn_on: relay_fan_1
- delay: 20ms
- switch.turn_off: relay_fan_2
- delay: 20ms
- switch.turn_off: relay_fan_3
- if:
condition:
lambda: return ((state > .4) && (state < .7));
then:
- switch.turn_on: relay_fan_1
- delay: 20ms
- switch.turn_on: relay_fan_2
- delay: 20ms
- switch.turn_off: relay_fan_3
- if:
condition:
lambda: return (state > .7);
then:
- switch.turn_on: relay_fan_1
- delay: 20ms
- switch.turn_on: relay_fan_2
- delay: 20ms
- switch.turn_on: relay_fan_3
- if:
condition:
lambda: return (state < 0.01);
then:
- switch.turn_off: relay_fan_1
- delay: 20ms
- switch.turn_off: relay_fan_2
- delay: 20ms
- switch.turn_off: relay_fan_3
binary_sensor:
- platform: gpio
id: fan_light_sensor
pin:
number: P14
mode: INPUT
inverted: True
on_press:
- light.toggle: light1
- platform: gpio
id: fan_power_sensor
pin:
number: P1
mode: INPUT
inverted: True
on_press:
then:
- fan.toggle: fan_1
- platform: gpio
id: fan_speed_sensor
pin:
number: P8
mode: INPUT
inverted: True
on_press:
then:
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_off: relay_fan_2
- switch.is_off: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 2
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_on: relay_fan_2
- switch.is_off: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 3
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_on: relay_fan_2
- switch.is_on: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 1
fan:
- platform: speed
id: fan_1
output: fan_speed
name: ${friendlyname} Fan Speed
speed_count: 3
switch:
- platform: gpio
id: relay_fan_1
pin: P6
- platform: gpio
id: relay_fan_2
pin: P7
- platform: gpio
id: relay_fan_3
pin: P9
- platform: template
id: update_fan_speed
optimistic: True
turn_on_action:
then:
- delay: 200ms
- if:
condition:
and:
- switch.is_off: relay_fan_1
- switch.is_off: relay_fan_2
- switch.is_off: relay_fan_3
then:
- fan.turn_off: fan_1
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_off: relay_fan_2
- switch.is_off: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 1
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_on: relay_fan_2
- switch.is_off: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 2
- if:
condition:
and:
- switch.is_on: relay_fan_1
- switch.is_on: relay_fan_2
- switch.is_on: relay_fan_3
then:
- fan.turn_on:
id: fan_1
speed: 3
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