Does espruino support bonding with a pin?

Great! That sounds really promising!

Yes! Just delete:

gatt.disconnect();

writeV­alue by itself shouldn't cause a disconnect, so you should be able to stay connected and just keep writing to it - you just have to have saved characteristic to a variable that you can access once you've left that last part of the promise.

If you can't see advertisements then it'll be because you're connected - so you should just be able to keep writing to the characteristic and you're sorted.

I guess it's possible that the camera wants you to have subscribed to indications on the other characteristic before it'll perform the command?