Disconnection after 30s on reconnection with custom service on phone

RE: Disconnection after 30s on reconnection with custom service on phone

Paul K — Wed, 19 Jan 2022 07:43:16 GMT

The issue had to do with the way I was storing the cached characteristics of my custom service with `pm_peer_data_remote_db_store`. I was storing the characteristic handle as a cccd_handle.

This is solved.

RE: Disconnection after 30s on reconnection with custom service on phone

Paul K — Tue, 18 Jan 2022 17:53:08 GMT

Understood. To use the sniffer I need an extra devkit. I'll use the sniffer once I receive it.

The custom service only uses 2 characteristics (one read,write, one read). No notifications or indications.

But, I do use nrf_ble_gatts_c. Which uses indications. I get the NRF_BLE_GATTS_C_EVT_SRV_CHANGED indication. But I can't see how this could fail to properly reply to gatts indication _only_ when I use `ble_db_discovery_evt_register(my_custom_service_uuid)`.

RE: Disconnection after 30s on reconnection with custom service on phone

Hung Bui — Tue, 18 Jan 2022 10:17:31 GMT

Hi Paul,

I would suggest to capture a sniffer trace so we know exactly what happened. Note that if the devices are paired, you need to use the sniffer to capture the initial pairing so that the sniffer can catch the keys.

From what you described, it's most likely that the application didn't send the confirmation back to the phone. Are you planning to do notification or indication ? For notification you don't need to confirm the message when with indication you need to confirm that you receive the message. Please have a look here.