Android phone can not find bluetooth device after unpaier

[Rosko]

Hi,
I have a problem find bluetooth device on more android phones after them unpair.

First time phones find device and connect but after unpair phone not find devices.

This issue is only for android bluetooth app. NRF Connect and PC all work fine.
I use NRF52810 and tested more exsamples in SDK15.3 and SDK16.
Possibly the problems on standard bluetooth app but different models and brands phones have this issue. I tryed clear all data from
bluetooth app but issues remains.
How I can fix this issue ?

[Edvin]

Hello,

 

First time phones find device and connect but after unpair phone not find devices.

 What do you mean by unpair? Do you mean "disconnect" or "forget device"(delete bonding information)?

What application is running on the nRF52 device? What did you flash it with? Does it use bonding? Does it use a whitelist? If you erase the flash and re-program the application and the softdevice, is it visible again after that?

To erase the device, you can use the nRF Command Line Tools command "nrfjprog --eraseall"

[Rosko]

 Yes I see the device in nRF Connect for Android but not see from Android bluetooth app