Microbit signal data out over bluetooth?

I know, sorry - I'd posted the first comment before you opened the new thread though :)

So it looks like Android is very picky, and you have to specify the advertising data exactly. I've had to build a new version of Espruino that allows you to specify the entire advertising packet (hopefully a micro:bit build will be available in a half hour or so).

Also, Android will silently refuse to recognise any non-HTTPS links, even if they're via goo.gl (which is HTTPS), so you're hit twice.

This works though (with the new build)

NRF.setAdvertising([0x03,  // Length of Service List
  0x03,  // Param: Service List
  0xAA, 0xFE,  // Eddystone ID
  0x13,  // Length of Service Data
  0x16,  // Service Data
  0xAA, 0xFE, // Eddystone ID
  0x10,  // Frame type: URL
  0xF8, // Power
  0x03, // https://
  'g','o','o','.','g','l','/','B','3','J','0','O','c'],
    {interval:100});