Error 515 - Problems to connect a Bluetooth device

[Vinícius Goulart]

Dear all

I am using App Inventor to build a simple android app to connect a mobile to a Arduino.

All hardware is working fine and I tested it the using a app called Ardudroid. My Arduino worked as expected.

I'm using a Samsung Galaxy S3, a Arduino UNO, and a Bluetooth module HC-06.

While trying to connect using the app I built with App Inventor 2, I receive the error message 515 (Not connected to a bluetooth device).

I used list pick (before picking) to load the elements and connect to a paired device using  Call.bluetooth.client1.Connect  address. ListPicker. Selection.

I am using only one screen as suggested in other topics in this forum and I can't figure my mistake?

Any help is highly appreciated

ps. please see the block design attached

  

[Taifun]

how to connect correctly

Taifun

[Vinícius Goulart]

Dear Taifun

Thank you for your quick answer.

Unfortunately, it is not working yet. I did exactly as the diagram you sent, but it did not worked. I attached the snapshot of my block design. Note it is the same you sent.

Do you have any suggestions?

Kind regards

AN UPDATE

I was able to connect using the MAC Address and a button!

See the block design attached.

I programed my Arduino to activate a motor for 500 ms by sending the text "1". However it does not stop using the app I created with app inventor (It works with ardudroid). 

Anyway, I think it is a matter for other topic.