John, I've been through that page several times. No help. I have a terminal program on my PC that connects to the Arduino BT module every time. In fact, I've been running it all day off and on. The Arduino sits here on my desk powered up, BT module blinking away...
Best I can get from the Android is an app I downloaded to fix the Bluetooth function works one time. The Android will connect, and before I can calibrate the scale it drops the connection and won't re-connect until I 'repair' the BT again. It just won't stay repaired.
In fact, I have a terminal app on the Android that will connect to the Arduino BT module, after 'repair', and it's connected now and displaying the caliper data. If I shut it off and start it again, it will not connect until I repair the BT again...Sooooo frustrating.