Good afternoon,

I bought some days ago the KC868-A16S board but I cannot understand about power source / wiring :

1. how many watts is the power consumption of the board ?
   
2. why there are 2 inputs for +12v power source and 2 inputs for -12v (GND) power source ?
   

Hello friends,

I am renovating an old house and would be interested in one of the two modules bellow for automating some lights, garage door, etc. 

The modules I am interested in are:
  1. ARDUINO ESP32 32 CHANNEL RELAY MODULE – KC868-A32 (I will refer to it as the "32 relays module")
  2. KC868-E16T ESP32 TUYA DIN RAIL RELAY MODULE (I will refer to it as the "16 relays module")

I have a few questions if anybody could shed some light:
    1. What are the differences between the 2 modules (except the different number of relays, the relays current rating and the lack of digital input like Ds18B20 on one of the models)?
    2. Does the 32 relay model support RF frequency control via a remote ? 
    3. Does the 32 relay model support Tuya App control and home assistant controll at the same time? 
    4. Does the 16 relay model support Tuya App control +  home assistant controll  + RF controll all at the same time? 
    5. For the 16 relay module, if I connect wired internet cable, is the Wifi Tuya antenna required to be installed in order for the tuya app part to work? (it will be placed in a location with wired internet, but very low quality wifi)
    6. In any of the 2 modules, the dry contact (digital inputs) require a momentary switch or it can be connected to a latching switch (standard wall light switch) ?
    7. What is the voltage present on the dry contact (digital inputs) (I would like if possible to connect in parallel with the wall switch, a led with resistor so I have a "night light" as a traditional light switch does have the indicator led)? 
    8. Does the 16 relay module support HMI Display ? 


P.S. I am asking for the 2 different models because for the start it may be enough 16 relays, but after further expansion/ adding new devices in the house I may require more then 16

Thank you in advance. 
      Best Regards,
                     DariusM

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Hi.

I have a 6 gang wall switch connected to KC868-Server and the issue that I'm  having is that when I connect Dx the LED is ON by default and when I turn on the relay the LED is OFF.

Cabling:
KCOM > GND
K1 > Digital Input 1
DCOM > +12v
D1 > Digital Output 1

I want LED to be ON when Relay 1 is ON... any ideas?

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We are looking for the implementation of automation in our home.
We have more than 32 inputs and outputs so we were looking at the following board: KC868-A64
What is the difference between this board with an esp32 and a board with a raspberry CM4? 
Or a board with both a raspberry and an esp.