Puck.js Connect to Adafruit Feather Board

One of the things I am stuck on with the ble_uart module, is what does the puck code look like if I already have an established connection. When I look at the source of the module, and most of the examples, they show requestDevice as the default. But when I try to use the standard ble_uart, I am getting errors that I am already connected or if I do something like :

// Function to send a message
function sendMessage() {
  console.log("Trying to Connect");
  NRF.requestDevice({ filters: [{ id: feather }], active:true }).then(function(device) {
    print(device);
    uart.write(device, "true");
  }).then(function() {
    console.log('Done!');
  });
}

I get a "Uncaught Error: Unhandled promise rejection: Error: Function "write" not found!"

Here is all of the testing code:

var feather = "ff:8d:05:ae:17:64 random";
var uart = require("ble_uart");


NRF.setAdvertising({},{
  name: "Splitz Puck",
  showName: true,
  discoverable: true,
  connectable: true,
  scannable : true,
});

// Blink green for 100ms
function blinkGreen() {
  LED2.write(true);
  setTimeout(function () { LED2.write(false); }, 100);
}
// Function to send a message
function sendMessage() {
  console.log("Trying to Connect");
  NRF.requestDevice({ filters: [{ id: feather }], active:true }).then(function(device) {
    print(device);
    uart.write(device, "true");
  }).then(function() {
    console.log('Done!');
  });
}

/*function sendMessage(text, tx) {
  return new Promise(function sender(resolve, reject) {
    if (text.length) {
      tx.writeValue(text.substr(0,20)).then(function() {
        sender(resolve, reject);
      }).catch(reject);
      text = text.substr(20);
    } else resolve();
  });
}*/

// Send a message when the button is pressed
setWatch(function() {
  blinkGreen();
  sendMessage();
}, BTN, { edge: "rising", debounce: 50, repeat: true });