Android Question Connecting to Bluetooth Classic (BR/EDR) SPP serial modules


Licensed User
I would like to port the Bluetooth Android app I wrote on App Inventor 2 over to B4A.
It connects very easily to SPP modules in transparent serial mode.
Does B4A have the ability to connect to these modules (e.g. BT04-A, JDY-10, etc), or is there only BLE capability?

Edit: Forgive me for the premature question. I have now found some more SPP info in the forum. Rookie mistake.

Upon further experimenting, I found that I could connect using the HC05 Datalogger example project if the input variable is changed to type String instead of Byte thus allowing parsing. I feel that this example project could be customised and used as the basis to build on.

Thank you for such a powerful development environment. Now to buckle down and do some serious learning.
Last edited:


Well-Known Member
Licensed User
Longtime User
... or is there only BLE capability?
yes, we have been using BLE with Android and iOS devices.

then your modules should work with B4X

...connect using the HC05

Edit: ahah I just read you found more info :p
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