Bangle 2. How to set GPS Serial1 baud rate?

I see. But it is too complicated for me :).
I've made delayed call of Serial1.setup via simple setTimeout.

var baudRate = 9600;
var serialBaudRate = 9600;

function setSerial1BaudRate(){
  print("set Serial1 BaudRate", baudRate);
  Serial1.setup(baudRate,{rx:D30, tx:D31});
  serialBaudRate = baudRate;
}

function setBaudRate(br){
  var brn = "";
  switch (br) {
    case 4800:  brn = "0"; break;
    case 9600:  brn = "1"; break;
    case 19200: brn = "2"; break;
    case 38400: brn = "3"; break;
    case 57600: brn = "4"; break;
    case 115200:brn = "5"; break;
    default:
      return;
  }
  print("set Baud Rate", br);
  baudRate = br;
  sendCommand("CAS01," + brn);
  const to1 = setTimeout(setSerial1BaudRate,1000);
}

setBaudRate(19200);