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NordicSemiconductor / Android-BLE-Library

A library that makes working with Bluetooth LE on Android a pleasure. Seriously.
BSD 3-Clause "New" or "Revised" License
1.98k stars 413 forks source link

Cannot connect the BLE device #560

Closed minhkimlong closed 3 months ago

minhkimlong commented 3 months ago

I've tried debugging, but I see the function isRequiredServiceSupported do not run when I run with S21 Samsung Galaxy 5G. Any instructions when I work with that device?

philips77 commented 3 months ago

Please find the documentation here: https://github.com/NordicSemiconductor/Android-BLE-Library/blob/main/USAGE.md This method should be called just after the device gets connected.

If you still have issues, please provide logs that you're getting in log(...) method.

minhkimlong commented 3 months ago

Hi @philips77 this is my log Screenshot 2024-05-08 at 22 26 20

minhkimlong commented 3 months ago

I followed all your instructions and tested a lot of Android devices. But only the S21 5G Samsung Galaxy I cannot connect to the Philips diffuser device @philips77

minhkimlong commented 3 months ago

I have more content for you when I reset all my data and connect to the Philips diffuser device. It took a long time to connect or cannot connect. But if connected successfully in the first time, it will work without any problems. Can I open this issue thank you @philips77

philips77 commented 3 months ago

Hello, It's hard to say what's the root cause of this issue. From the logs I see the error 0x08 (GATT CONN TIMEOUT), which usually happens when the target device stops responding for supervision timeout milliseconds. That would make sense, as you're getting it 5 seconds (equal to supervision timeout: 5000ms) after the device got connected.

For me this looks like a phone issue. Either the phone, or the peripheral sends a request and doesn't get a response back and kills the connection after 5 sec. Sometimes it happens when the target does not support a feature, but the central keeps asking for it, or ignores "not supported" and awaits something else. If you have access to the firmware, try disabling requesting PHY LE 2M or disable support for it and try again. For sure the issue is on the Samsung phone and the best you can do is to find a workaround or stop supporting that model.

minhkimlong commented 3 months ago

Thank you @philips77 I will try and give some update info for you