I just want to know how exactly connect my phone to another Bluetooth device. I am using my computer to build that app online. But it failed connecting. I really need help , Please~~!
see an example here
A simple Bluetooth Chat with App Inventor 2
You could search in the forum using the Search for topics box to the right of the colorful google at the top of this page with terms like bluetooth or arduenio or Lego NXT. This will lead you to forum discussions about connecting to Bluetooth devices, however, you will have to search the data.
The control itself that allows communication is described here: http://ai2.appinventor.mit.
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