Error 14 (0xe): GATT ERR UNLIKELY

[IvanR]

After sending a notification that is less than the negotiated MTU. It is less than 20 bytes

It occurs sporadically. 

I 10:26:08.450 Notification received from 15ff1845-05d3-4c5b-8281-93d4e07420cf, value: (0x) 30-2E-30-30-2C-2D-30-2E-30-30-2C-30-2E-30-32, "0.00,-0.00,0.02"
A 10:26:08.450 "(0x) 30-2E-30-30-2C-2D-30-2E-30-30-2C-30-2E-30-32, "0.00,-0.00,0.02"" received
I 10:26:08.453 Notification received from 15ff1845-05d3-4c5b-8281-93d4e07420cf, value: (0x) 30-2E-30-31-2C-2D-30-2E-30-30-2C-30-2E-30-34, "0.01,-0.00,0.04"
A 10:26:08.453 "(0x) 30-2E-30-31-2C-2D-30-2E-30-30-2C-30-2E-30-34, "0.01,-0.00,0.04"" received
I 10:26:08.457 Notification received from 15ff1845-05d3-4c5b-8281-93d4e07420cf, value: (0x) 30-2E-30-30-2C-2D-30-2E-30-30-2C-30-2E-30-33, "0.00,-0.00,0.03"
A 10:26:08.457 "(0x) 30-2E-30-30-2C-2D-30-2E-30-30-2C-30-2E-30-33, "0.00,-0.00,0.03"" received
E 10:26:08.458 Error 14 (0xe): GATT ERR UNLIKELY

I use nRF Connect app for testing on Android.

[Vidar Berg]

Hello,

Is the log above from nRF Connect or your nRF5340 board? Also, after getting the GATT error, do you stop receiving notifications?

Thanks,

Vidar

[IvanR]

The log is from nRf Connect app. 

No, notifications keep going

[Vidar Berg]

So this could potentially be a bug in the Android phone. Have you been able to reproduce this with different phones?

[IvanR]

it also showed up in dev app on a different phone

[Vidar Berg]

Please provide a sniffer trace showing the packet exchange when this error is reported. It would also be interesting to know if you are able to reproduce this with any of the SDK examples. 

[IvanR]

Wireshark and nrf52840 dongle don't see those packets.