02-03-2023, 11:24 PM
1. Yes, it already have firmware inside, if you want to use by home assistant, KC868-AK support download your yaml config file by ESPHome.
2. RS232 mainly use RXD,TXD,GND. Here you can see the Pin define. what RS232 cable you have used? black color or white color? can you take a photo.
![[Image: KC868-AK_diagram.jpg]](https://www.kincony.com/images/user-guide/kc868-ak/KC868-AK_diagram.jpg)
3. sure, now you pressed one button, will send command to RS232 and RS485, just RS485 use by modbus protocol command.
how to use KC868-AK guide: https://www.kincony.com/how-to-use-progr...board.html
2. RS232 mainly use RXD,TXD,GND. Here you can see the Pin define. what RS232 cable you have used? black color or white color? can you take a photo.
3. sure, now you pressed one button, will send command to RS232 and RS485, just RS485 use by modbus protocol command.
how to use KC868-AK guide: https://www.kincony.com/how-to-use-progr...board.html