how to check if BLE is connected

RE: how to check if BLE is connected

Nivetha — Tue, 17 Oct 2017 13:03:02 GMT

Sure @Hung. Thanks!

RE: how to check if BLE is connected

Hung Bui — Tue, 17 Oct 2017 10:44:43 GMT

Hi Nivetha, I suggest to continue the discussion in your other case devzone.nordicsemi.com/.../

RE: how to check if BLE is connected

Nivetha — Mon, 16 Oct 2017 08:06:21 GMT

yes, is my settings good for connection interval of 10ms? If I switch off the peripheral device during data transmission and switch on again, I expect it to start sending the Adv packets and continue with the data transmission.

RE: how to check if BLE is connected

Petter Myhre — Fri, 13 Oct 2017 20:49:00 GMT

I'm not sure how to interpret your last comment. Is it a question?

RE: how to check if BLE is connected

Nivetha — Thu, 12 Oct 2017 14:32:31 GMT

my APP_ADV_INTERVAL is 25ms and advertising timeout is 0. My scan interval is 50 ms, scan window is 20ms, connection interval is 10ms. Suppose, I reset the central device, I expect it to start scanning after the connection supervision timeout of 1second.

RE: how to check if BLE is connected

Nivetha — Thu, 12 Oct 2017 13:41:23 GMT

Yeah, I got it. Thanks!

RE: how to check if BLE is connected

Petter Myhre — Thu, 12 Oct 2017 13:36:29 GMT

To be able to connect after you have disconnected the peripheral must advertise, and the central must scan. The more aggressive you advertise/scan the faster you will be connected. I'm not sure if this answers your questions?

RE: how to check if BLE is connected

Nivetha — Thu, 12 Oct 2017 12:03:02 GMT

Hi @Petter. I have a similar question, when the central stops receiving the data or if the peripheral goes out of range and comes in again. How to get reconnected successfully without any delay? i.e peripheral should start adversitising immediately and the central should be able to pick it up. I am working on a medical application where the peripheral is in a patients body who is expected to move in and out. Hence, there will be a loss in the connection and once they are within range, how to enable the connection and data transmission automatically? The connection interval I'm using is 10 ms, nrf52840 DK on peripheral and nrf52840 DK as a central device. Your help is much appreciated. Thanks!

RE: how to check if BLE is connected

Petter Myhre — Tue, 15 Nov 2016 08:31:00 GMT

Have I misunderstood your problem?

RE: how to check if BLE is connected

Petter Myhre — Fri, 11 Nov 2016 14:16:07 GMT

I don't understand why you are showing me this code. Again, there is no need to check if you are connected after a reset, because you will never be.

RE: how to check if BLE is connected

martin — Fri, 11 Nov 2016 14:09:49 GMT

..........

RE: how to check if BLE is connected

Petter Myhre — Fri, 11 Nov 2016 13:53:02 GMT

The central device may still believe it is connected, because it wouldn't know why the peripheral doesn't respond. It doesn't know that the device has been reset, it will just experience that packets are lost. Maybe you can call sd_ble_gap_disconnect() and wait for the BLE_GAP_EVT_DISCONNECTED event before you do the reset? Then the link will be disconnected.

RE: how to check if BLE is connected

martin — Fri, 11 Nov 2016 13:45:50 GMT

i am using BLE Scanner app which shows me that after the reset i am still connected.When i receive the command from the RS and the reset is done it seems that i am still connected for a small period of time (3-5 sec) after which i am getting disconnect.I was told that this delay must be removed.

RE: how to check if BLE is connected

Petter Myhre — Fri, 11 Nov 2016 13:12:30 GMT

After a reset you will not be connected to anything.

If you have a peripheral device you will have to start to advertise and wait for the central device to send a connection request to you before you can be connected again.

RE: how to check if BLE is connected

martin — Fri, 11 Nov 2016 12:08:27 GMT

Hi Petter i tried to explain better my problem

RE: how to check if BLE is connected

Petter Myhre — Fri, 11 Nov 2016 09:39:37 GMT

I'm having trouble understanding you, could you please edit and rephrase your question? What exactly is a master reset?