1. To enable the USB 2.0 ports on the raspberry pi 4 Compute Module 4, you need to edit the boot config file (/boot/config.txt) and add:

dtoverlay=dwc2,dr_mode=host

2. enable home assistant "Advanced Mode"

3. install ESPHome in Add-ons

4. config KC868-Uair

KC868-Uair document:

KC868-Uair ESP32 I/O pin define: https://www.kincony.com/forum/showthread.php?tid=1438

ESPHome configure for KC868-Uair: 

esphome:
  name: kc868-uair
  platform: ESP32
  board: esp32dev

# Enable logging
logger:

# Enable Home Assistant API
api:

ota:
  password: "978e66f878ed5041b830cfb427393c79"

wifi:
  ssid: "KinCony"  # your wifi router ssid
  password: "12345678"  # your wifi password

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "Kc868-Uair Fallback Hotspot"
    password: "FbTxCLlbDvbO"

captive_portal:

# follow configure use for DS18B20 temperature sensor, SHT30 temperature and humidity sensor. WS2812B RGB LEDs.
i2c:
  sda: 4
  scl: 16
  scan: true
  id: bus_a

         
# Example configuration entry
dallas:
  - pin: GPIO27
    update_interval: 15s

# Individual sensors
sensor:
  - platform: dallas
    address: 0xC000000004D81528  # your DS18B20 address
    name: "internal Temperature"
 
# Example configuration entry
  - platform: sht3xd
    temperature:
      name: "extend Temperature"
    humidity:
      name: "extend Humidity"
    address: 0x44
    update_interval: 15s
 
light:
  - platform: fastled_clockless
    chipset: WS2812B
    pin: GPIO32    # Pin Define connected with LED strip
    num_leds: 4  #LEDs number
    rgb_order: GRB
    name: "Uair-Bottom-LED"
    effects:
      - addressable_rainbow:        ##defined 7 effects styles
      - addressable_color_wipe:
      - addressable_scan:
      - addressable_twinkle:
      - addressable_random_twinkle:
      - addressable_fireworks:
      - addressable_flicker:

  - platform: fastled_clockless
    chipset: WS2812B
    pin: GPIO33    # Pin Define connected with LED strip
    num_leds: 1  #LEDs number
    rgb_order: RGB
    name: "Uair-Vertical-LED"
    effects:
      - addressable_rainbow:        ##defined 7 effects styles
      - addressable_color_wipe:
      - addressable_scan:
      - addressable_twinkle:
      - addressable_random_twinkle:
      - addressable_fireworks:
      - addressable_flicker:


  Made_for_ESPHome_KC868-Uair.txt (Size: 1.97 KB / Downloads: 816)

This video is made by Calin from UK. Thanks for him help us let KC868-A4 relay controller integrate with Loxone smart home automation system.

This video is made by Calin from UK. Thanks for him help us let KC868-A4 relay controller integrate with Loxone smart home automation system.

This video is made by made by Mr. wilson fernandes from Kuwait.

This video is made by made by Mr. wilson fernandes from Kuwait.

This video is made by Calin from UK. Thanks for him help us let KC868-H32B relay controller integrate with Loxone smart home automation system.

This video is made by Calin from UK. Thanks for him help us let KC868-H32B relay controller integrate with Loxone smart home automation system.

As I wrote in my other post, I connected the push button switch module to rs232 to the LAN converter, I would know if it is possible to change the push button switch module firmware to get a message every time I press and leave a contact from the input like in your video (https://www.kincony.com/momentary-latch-...n-diy.html)
If I press and hold a button I receive RELAY-KEY-255, X, 1,
If I release the button I receive RELAY-KEY-255, X, 0

do you think is possible?
thank you in advance

Thanks for zgabi from Hungary made the document for KC868-H32B integrate with Loxone by RS232.

   
   

  KC868 HxB Integration with Loxone RS232.pdf (Size: 193.79 KB / Downloads: 1170)

improvement:

mainly support integrate to Loxone Mini-Server by RS232 port.

1. after INPUT trigger (when released input with GND) will auto feedback "DIARM" message to TCP client and RS232.

such as if you let INPUT short with GND, will send "RELAY-ALARM-1,OK" , that means: INPUT-1 is trigger.
when released, will send "RELAY-DIARM-1,OK" , that means: INPUT-1 is released, just "disable alarm".

2. It supports sending multiple control relay commands to the KC868-H32B at one time by RS232 or TCP. The controller will process them in a queue without discarding the commands. At most, MAX 32 commands can be received at the same time

such as you can send these command at one time by RS232 or TCP:
RELAY-SET-255,1,1
RELAY-SET-255,2,1
RELAY-SET-255,3,1
RELAY-SET-255,4,1
RELAY-SET-255,5,1
RELAY-SET-255,6,1
RELAY-SET-255,7,1
RELAY-SET-255,8,1
RELAY-SET-255,9,1
RELAY-SET-255,10,1
RELAY-SET-255,11,1
RELAY-SET-255,12,1
RELAY-SET-255,13,1
RELAY-SET-255,14,1
RELAY-SET-255,15,1
RELAY-SET-255,16,1
RELAY-SET-255,17,1
RELAY-SET-255,18,1
RELAY-SET-255,19,1
RELAY-SET-255,20,1
RELAY-SET-255,21,1
RELAY-SET-255,22,1
RELAY-SET-255,23,1
RELAY-SET-255,24,1
RELAY-SET-255,25,1
RELAY-SET-255,26,1
RELAY-SET-255,27,1
RELAY-SET-255,28,1
RELAY-SET-255,29,1
RELAY-SET-255,30,1
RELAY-SET-255,31,1
RELAY-SET-255,32,1


  Relay32_V443_220402.zip (Size: 47.02 KB / Downloads: 980)
download the ZIP file , unzip update the bin file for KC868-H32B relay controller by USB-RS232 cable.