smart_tunnel_edge/config/serial.json

{
  "serial":{
    "1":{
      "Code":1,
      "Interface":"RS485_1",
      "Address":"COM3",
      "BaudRate":9600,
      "DataBits":8,
      "StopBits":1,
      "Parity":"N",
      "Timeout":3000
    }
  }
}