Connection problem GATT_ERROR 133 (0x85)

[Mario]

Hello,

I am using Samsung Galaxy Tab A (2016) with android version 5.1.1 build LMY47V and I can not connect to the bluetooth module at all. In the log of the nrf Connect I see that Error 133 (0x85): GATT ERROR happen immediately after I press the connect button.

The softdevice is 2.0.1 nRF52832_xxaa_s132 board pca10040 and the example that i used is based on ble_app_multirole_lesc.

I also tried to connect to the bootloader in order to upload the app but with no success.

The restart of the phone do not help or even the erasing the flash of the chip.

Any solutions how to solved this, thanks in advance.

[manuj]

Hi , I have the same problem with my NRF51 (PCA10028) with my samsung galaxy TAB A6.

Is It possible to have the softdevice V3.1.0 for nrf51 ?

[Sigurd]

Hi manuj,

As endnode pointed out there will not be a new major SoftDevice version for nRF51. Compatibility mode is therefore not support on nRF51. The actually problem here is that Samsung Galaxy TAB A6 is breaking/not following the Bluetooth specification. With S132 v.3.1.0 (for nRF52) we added something called compatibility mode that can be enabled to still be able to connect to some of these devices that are not following the Bluetooth Specification.

[Bernard]

I know this is an old thread, but is there a current list of the TAB A that have the problem? These devices are still sold in 2019 and we need to know which one we can support with our NRF51-based product

[Sigurd]

Hi Bernard,

Bernard said:

NRF51-based product

I think the issue is fixed in the latest TAB A devices, but I don’t have any lists over the affected TAB A versions. That said, I think Samsung released a software update that fixes this issue, so if you see any devices with the issue, you should update the android firmware on the Tab A device.

[Bernard]

I appreciate the response on such an old thread. You are correct that we did not see any issue recently but we had a tendency to put all the Tab A issues into a big bucket!