Android issues with BLE

RE: Android issues with BLE

Petter Myhre — Mon, 25 Jul 2016 12:29:49 GMT

I'm not sure, maybe you can add a new question regarding this?

RE: Android issues with BLE

soumil — Thu, 21 Jul 2016 05:18:30 GMT

Thanks for sharing that link. This is really helpful. Cant we set the connection parameters on the phone side directly. Do we need to change the Android source code for that or there are some functions to do that?

RE: Android issues with BLE

Petter Myhre — Wed, 20 Jul 2016 11:22:52 GMT

I don't know what the scan intervals/windows are on Android, but I found this. As a peripheral you can only request a connection parameter update, it is up to the central device to actually do it. See this for more information.

RE: Android issues with BLE

soumil — Wed, 20 Jul 2016 09:14:41 GMT

Okay thanks would try this. Do we know for different scan modes what are the scanning intervals set on the phone side. For example in case of SCAN_MODE_LOW_LATENCY, what is the scanning interval? Also can i change the connection parameters from the firmware side. Is it using connection params update ?

RE: Android issues with BLE

Petter Myhre — Tue, 19 Jul 2016 10:13:24 GMT

Could it be that you are using a different advertising interval when you restart advertising on a disconnect?

You could try decreasing the advertising interval and see if that makes a difference. Or you could try changing the SCAN_MODE_LOW_LATENCY when you scan.

See this for how to check the actual connection interval.

RE: Android issues with BLE

soumil — Tue, 19 Jul 2016 04:43:43 GMT

We have made our own app using the android Ble library. The advertising interval i am using on the nordic board is 500ms. When i say it happens only for one time and not after that means that when scanning is done for the first time, the phone takes a long time to find the nordic device but once paired/connected once, then the next time device discovery happens quickly. How do you set the connection interval in android?The peripheral connection parameters are set as min to 500 ms and max to 1000 ms. The smartphone reads the custom characteristic after connection.

RE: Android issues with BLE

Petter Myhre — Thu, 14 Jul 2016 07:57:56 GMT

What app are you using to scan? What advertising interval are you using? What do you mean by "This happen only for the first time and not after that"? What connection interval are you using? How are you sending the information to the smart phone? Does the smart phone read the result, or does the nRF5 send a notification with the result?