Out of sync ble events causing disconnects

RE: Out of sync ble events causing disconnects

Susheel Nuguru — Mon, 05 Aug 2024 12:09:36 GMT

I am not sure about that, you should tell me here which one is the master and which one is the device. If you have flashed peripheral in the nRF Device, then yes, slave is the nRF device in this case.

RE: Out of sync ble events causing disconnects

jerome.sc — Thu, 01 Aug 2024 07:15:15 GMT

In what you said above, are you saying the master is the app, and the slave is the device?

RE: Out of sync ble events causing disconnects

Susheel Nuguru — Thu, 01 Aug 2024 06:47:33 GMT

In the scenario where it is not working I am not able to see the master sending a write response to the request sent by the slave.

I can see that the slave tries to do the request mutiple times before it gives up due to the lack of response from the Master. I think this is a procedure timeout that kicks in and disconnects the slave. Can you see why the master is not responding to the slave with write response?

RE: Out of sync ble events causing disconnects

jerome.sc — Wed, 31 Jul 2024 12:27:11 GMT

Yes, this was my thoughts. The delay is after the connection event on the app. It's hard to say whether all of the events are being handled as that's done by someone else. But from the packets sniffed, it the difference in events are clearly part of the problem.

RE: Out of sync ble events causing disconnects

Susheel Nuguru — Wed, 31 Jul 2024 10:39:09 GMT

Where exactly have you added the delay in the app? Are you handling all the events the application should handle? Have you registered callbacks from libraries and drivers and handling the events from them correctly?

Adding delay helping most of the time means that your app is doing something fast without waiting for the previous operation to complete.

RE: Out of sync ble events causing disconnects

jerome.sc — Wed, 31 Jul 2024 07:09:34 GMT

I don't think it has a problem with hardware based on the packets, but I guess it could be firmware-related. However, adding a delay on the app has helped reduce the problem, but doesn't explain what the root cause is.

RE: Out of sync ble events causing disconnects

billtsai — Tue, 30 Jul 2024 01:23:59 GMT

Hi,

Ble event 0x57 is BLE_GATTS_EVT_HVN_TX_COMPLETE.

Ble event 0x12 is BLE_GAP_EVT_CONN_PARAM_UPDATE.

Ble event 0x11 is BLE_GAP_EVT_DISCONNECTED.

From first log, the disconnect request is send from your device. Maybe you can find where you send disconnect request.

In second log, it seems that the device does not response to host.

It would be good to program your fw to Nordic dk board. This will help figuring out the problem is from hw or fw.