KC868-A8 PCB updated V1.5

[admin]

new pcb v1.5 of KC868-A8, replaced USB-C with MiniUSB port.

[macek]

Very good news, I am waiting for a board with an input connect to I2C extender for KC868-A8/A8S .

[admin]

KC868-A8/A8S both have I2C extender

[macek]

KC868-A8/A8S both have I2C extender

Exactly, but I needs a board (with only dry contact inputs, example input on PCF8574) that we connect to KC868-A8/A8S, to I2C extender port.

KC868-A128 ESP32 board or KC868-AI ESP32 input module it is too big, it will not fit into the POWER DISTRIBUTION BOX (https://simple.wikipedia.org/wiki/Distribution_board).

[admin]

do you want a board only have input via PCF8574? how long between the "IIC input board" with KC868-A8/A8S?

[admin]

8 channel in one i2c extend board?

[macek]

do you want a board only have input via PCF8574?

Yes, expansion board (with only input, input channel use optocoupler isolation,) for KC868-A8/A8S, like this - https://prnt.sc/UUCZXgM3QPQG

Can be installed above (on top) the KC868-A8/A8S board , there is a lot of space, something like - https://boneio.eu/img/boneIO_v0.2render.png

ESPHome support PCF8574 I/O Expander or MCP230xx I/O Expander. Kincony uses the PCF8574 expander everywhere.

8 channel in one i2c extend board?

It's the minimum, but it's better if the 16 channel will be.
16 connectors will fit on the side of the case.

[admin]

ok, i see, thanks for your suggestion.

[admin]

I suggest that it is better to use a complete relay motherboard, which is more stable than using I2C expansion mode. I2C mainly use PCB wire, use cable will not stable maybe.

[macek]

I suggest that it is better to use a complete relay motherboard,

I don't think we understand each other, I don't need another complete relay board, I need a board with more inputs.

All Kincony products have the same number of digital (dry contact) inputs and digital outputs (relay) - one digital input (button) for one relay (light). This is enough for 4 rooms - 2 buttons for 2 light when use KC868-A8/A8S board. But in a smart home, in a one room, I have more digital inputs:
- a motion sensor
- a door opening sensor
- a window opening sensor
- a lock sensor
I have nowhere to connect these sensors to have all the automation (ESPHome automation) in one KC868-A8 / A8S controller:

binary_sensor:   
  - platform: gpio
    name: "motion-sensor1"
    on_press:
      then:
        - switch.turn_on: switch1

Final conclusions: KC868 ESP32 board should have more inputs: more connectors on the motherboard or additional inputs on the expansion board connected to the I2C port on motherboard.