Android phone can not find bluetooth device after unpaier

RE: Android phone can not find bluetooth device after unpaier

Rosko — Fri, 10 Jul 2020 09:44:42 GMT

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

RE: Android phone can not find bluetooth device after unpaier

Edvin — Fri, 10 Jul 2020 09:14:18 GMT

After erasing the flash on the nRF52 (nrfjprog --eraseall), and deleting the bonding information on the Android. Try to turn off and on bluetooth on the phone (from the settings) and make sure that the nRF is advertising again before you start to scan. And make sure it is programmed with nRF Connect for Desktop.

Do you see the device in nRF Connect for Android? Is the nRF still advertising with the Keyboard example, or did you use another example at this point?

RE: Android phone can not find bluetooth device after unpaier

Rosko — Fri, 10 Jul 2020 08:26:06 GMT

Hi,
Thanks for reply.
Some details:
NRF-Connect worked fine (find device, connect ) but Android standart bluetooth app not find device.
1. unpair = forget device
2. I use ble_app_hids keyboard example
3. After forget device by android I delete whitelist (and with whitelist ) not changes
4. In pm_evt_handler I set (pm_conn_sec_config_t conn_sec_config = {.allow_repairing = true};)
5. Yes I erace device and re-program it not visible.
This problem have all the phones I've tested (Huawey, Xiaomi, Samsung)

6. I clear all bluetooth app data in Android

RE: Android phone can not find bluetooth device after unpaier

Edvin — Fri, 10 Jul 2020 06:48:55 GMT

Hello,

[quote user=""]First time phones find device and connect but after unpair phone not find devices.[/quote]

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"