Hello,

I want to use the outputs of a KC868-A8 to control 8 of my heating valves. They require 230V and not too much power, this should work fine.

However, I would like to use the inputs to read the state of the wall thermostats. These are usually connected directly to the valves, and are therefore delivering 230V if closed. Can you recommend a good way how I could connect these to the KC868-A8 inputs?

Thanks you!

We have designed the new version of "switch terminal board" -- KC868-AK. This is a powerful ESP32 programmable keyborad , support by home assistant via ESPHome for home automation DIYer. It also can work with KinCony's smart relay controller. let your wall switch panel can work with "1-click" , "2-click" and "hold on" actions.
 

  KC868_A64_V103_PCB_size_diagram.pdf (Size: 1.49 MB / Downloads: 747)

support KC868-AK switch terminal board for 1-click, 2-click , hold on actions.

  H32B_Pro_V114_221103.zip (Size: 53.93 KB / Downloads: 716)

The detail about RF pins at KC868-A8-schematic is not clear.
With try and error and help of a multimeter as the pins are covered. 

The pins are as in picture.

Attached Files

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firmware:
  tasmota_KC868-A6.zip (Size: 991.5 KB / Downloads: 1165)
                                           

What is the size of the Button switch module and the contactor 25A and 45A and 100A

and DC12V 4.5A power supply

Attached Files

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We have designed KC868-HA RS485 button adapter, let your old switch or traditional switch become smart, work with KC868-H32B Pro smart relay controller, use any “Latch” or “Momentary” switch panel work with your smart home automation. This time, regular switch can be used in smart home system.

esphome:
  name: kc868-ak
  platform: ESP32
  board: esp32dev
 
 
# Example configuration entry for ESP32
i2c:
  sda: 4
  scl: 5
  scan: true
  id: bus_a

wifi:
  ssid: "KinCony"
  password: "a12345678"

  # Enable fallback hotspot (captive portal) in case wifi connection fails
  ap:
    ssid: "A4 Fallback Hotspot"
    password: "ZvKhDPUYilHj"

captive_portal:



# Example configuration entry
pcf8574:
  - id: 'pcf8574_hub_in_1'  # for input channel 1-8
    address: 0x24

  - id: 'pcf8574_hub_in_2'  # for input channel 9-16
    address: 0x25

  - id: 'pcf8574_hub_in_3'  # for input channel 17-24
    address: 0x21

  - id: 'pcf8574_hub_in_4'  # for input channel 25-32
    address: 0x22

  - id: 'pcf8574_hub_in_5'  # for input channel 33-40
    address: 0x26



# Individual outputs

binary_sensor:
  - platform: gpio
    name: "ak-input1"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 0
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input2"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 1
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input3"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 2
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input4"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 3
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input5"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 4
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input6"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 5
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input7"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 6
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input8"
    pin:
      pcf8574: pcf8574_hub_in_1
      number: 7
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input9"
    pin:
      pcf8574: pcf8574_hub_in_2
      number: 0
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input10"
    pin:
      pcf8574: pcf8574_hub_in_2
      number: 1
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input11"
    pin:
      pcf8574: pcf8574_hub_in_2
      number: 2
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input12"
    pin:
      pcf8574: pcf8574_hub_in_2
      number: 3
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input13"
    pin:
      pcf8574: pcf8574_hub_in_2
      number: 4
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input14"
    pin:
      pcf8574: pcf8574_hub_in_2
      number: 5
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input15"
    pin:
      pcf8574: pcf8574_hub_in_2
      number: 6
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input16"
    pin:
      pcf8574: pcf8574_hub_in_2
      number: 7
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input17"
    pin:
      pcf8574: pcf8574_hub_in_3
      number: 0
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input18"
    pin:
      pcf8574: pcf8574_hub_in_3
      number: 1
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input19"
    pin:
      pcf8574: pcf8574_hub_in_3
      number: 2
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input20"
    pin:
      pcf8574: pcf8574_hub_in_3
      number: 3
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input21"
    pin:
      pcf8574: pcf8574_hub_in_3
      number: 4
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input22"
    pin:
      pcf8574: pcf8574_hub_in_3
      number: 5
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input23"
    pin:
      pcf8574: pcf8574_hub_in_3
      number: 6
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input24"
    pin:
      pcf8574: pcf8574_hub_in_3
      number: 7
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input25"
    pin:
      pcf8574: pcf8574_hub_in_4
      number: 0
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input26"
    pin:
      pcf8574: pcf8574_hub_in_4
      number: 1
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input27"
    pin:
      pcf8574: pcf8574_hub_in_4
      number: 2
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input28"
    pin:
      pcf8574: pcf8574_hub_in_4
      number: 3
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input29"
    pin:
      pcf8574: pcf8574_hub_in_4
      number: 4
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input30"
    pin:
      pcf8574: pcf8574_hub_in_4
      number: 5
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input31"
    pin:
      pcf8574: pcf8574_hub_in_4
      number: 6
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input32"
    pin:
      pcf8574: pcf8574_hub_in_4
      number: 7
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input33"
    pin:
      pcf8574: pcf8574_hub_in_5
      number: 0
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input34"
    pin:
      pcf8574: pcf8574_hub_in_5
      number: 1
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input35"
    pin:
      pcf8574: pcf8574_hub_in_5
      number: 2
      mode: INPUT
      inverted: true

  - platform: gpio
    name: "ak-input36"
    pin:
      pcf8574: pcf8574_hub_in_5
      number: 3
      mode: INPUT
      inverted: true

# Enable logging
logger:

# Enable Home Assistant API
api:



  KC868-AK_ESPhome.txt (Size: 6.06 KB / Downloads: 579)

IIC Bus:

SDA:GPIO4
SCL:GPIO5

PCF8574:U14 (DI1-8): 100 100 = 0x24
PCF8574:U31 (DI9-16): 100 101 = 0x25
PCF8574:U56 (DI17-24): 100 001 = 0x21
PCF8574:U57 (DI25-32): 100 010 = 0x22
PCF8574:U58 (DI33-40): 100 110 = 0x26
PCF8574:U32 (DI41-48): 100 011 = 0x23


free GPIO:
GPIO35
GPIO39
GPIO34
GPIO36

-----------------

Ethernet (LAN8720) I/O define:

#define ETH_ADDR        0
#define ETH_POWER_PIN  -1
#define ETH_MDC_PIN    23
#define ETH_MDIO_PIN  18
#define ETH_TYPE      ETH_PHY_LAN8720
#define ETH_CLK_MODE  ETH_CLOCK_GPIO17_OUT

--------------------

RS485:
RXD:GPIO16
TXD:GPIO14

RS232:
RXD:GPIO33
TXD:GPIO32