LCTech relay control via Espurino

Hi,

I'm trying to write some simple code to toggle a esp8266 based relay.

According to all the docs I've seen (and according to this post https://www.esp8266.com/viewtopic.php?p=66327) all one needs to do is send a series of hex codes out over the serial port to toggle the switch.

So I've written a very simple bit of code that I think should work, but I'm not overly familar with sending serial data.

function onInit() {

  Serial1.setup(9600);

  var relayOn = [0xA0, 0x01, 0x01, 0xA2];
  var relayOff = [0xA0, 0x01, 0x00, 0xA1];

  var toggle = true;
  setInterval(function() {
    if (toggle) {
      console.log('on');
      Serial1.write(relayOn);
      toggle = true;
    } else {
      console.log('off');
      Serial1.write(relayOff);
      toggle = false;
    }
  }, 5000);
}

Is there any obvious flaw in this code as its not working. I can see the blue led flash every 5 seconds as it sends the data, but is this the correct way to send a set of hex instructions?

Thanks