node-red connet to microbit

microbit_let_text.js

var BBCMicrobit = context.global.microbit
var text = 'Hello there';

console.log('Scanning for microbit');
BBCMicrobit.discover(function(microbit) {
  console.log('\tdiscovered microbit: id = %s, address = %s', microbit.id, microbit.address);

  microbit.on('disconnect', function() {
    console.log('\tmicrobit disconnected!');
  });

  console.log('connecting to microbit');
  microbit.connectAndSetUp(function() {
    console.log('\tconnected to microbit');

    console.log('sending text: "%s"', text);
    microbit.writeLedText(text, function() {
      console.log('\ttext sent');

      console.log('disconnecting');
      microbit.disconnect();
      
    });
  });
});
return msg;