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Android 9(API 28) connection issue.

See original GitHub issue

I have a connection issue. The app on Android 9 device(API 29) doesn’t connect to Bluetooth device. With the same app, the app on Android 7 connects to the same Bluetooth device,

socket = device.createRfcommSocketToServiceRecord(BLUETOOTH_SPP);

In connect() function, it gives exception. Would you give me any suggestion?

Issue Analytics

  • State:closed
  • Created 2 years ago
  • Comments:12 (4 by maintainers)

github_iconTop GitHub Comments

Chuntianhongcommented, Feb 9, 2022

Hello, I wonder how you solved this issue? I am encountering the same problem. My android app on android tablet can successfully create socket and send out something, but in Serial Bluetooth Terminal side, it keeps showing “read failed, socket might closed or timeout, read ret: -1”

We got new PCBAs with new WAN chip from the factory and tested it yesterday. After change it, Bluetooth module works correctly. So I guess the same issue on your side. You would change tablet device or contact the device manufacturer.

Chuntianhongcommented, Feb 8, 2022

It appeared in the factory-specific industrial tablets ordered for on-demand. Other Android devices work well with Bluetooth connections. So we reported this issue to the factory and already got new PCBAs recently and still need to test again. I will reply again once we finish the test.

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