I have basically the same use case as you have for this plug-in: to control a BLE IOT relay board by poking it with commands in hex. Is your code available as an installable .apk? I would really like to test it with a Tasker alternative (called Automagic, that has what is supposed to be - and is in my experience so far - compatibility with Tasker plug-ins. http://automagic4android.com/)