Here is a simple BlueTooth text receiver sample, for single value per line:
...
I do not advise using a wait extension.
If you need to delay something, save future deadlines computed from Clock1.SystemTime plus whatever delay you need, in mmilliseconds, and check the deadline on following clock timer cycles.
Also, be aware that switching screens breaks Bluetooth connections, so you are better off sticking to a single screen if you use Bluetooth.
You can hide Arrangements to simulate screens.