How to auto reconnect to BLE in android when it is in range and starts advertising?

RE: How to auto reconnect to BLE in android when it is in range and starts advertising?

Hung Bui — Wed, 03 Dec 2014 10:36:47 GMT

Hi Wen,

I assume you wanted to write "when device disconnect, i execute gatt.close(), gatt.disconnect..." not when the device connect ? You should not do that.

Actually you can simply test using the sample provided on Android website: developer.android.com/.../index.html And change autoconnect from false to true in connect() function in BluetootLEService.java after that the app will auto reconnect when the device back in range.

RE: How to auto reconnect to BLE in android when it is in range and starts advertising?

wen — Fri, 21 Nov 2014 01:39:05 GMT

I have try , it seems didn't work.

RE: How to auto reconnect to BLE in android when it is in range and starts advertising?

wlgrd — Thu, 20 Nov 2014 20:25:15 GMT

I haven't touched android development, but it sounds like you should not do gatt = null if you want to reconnect.

RE: How to auto reconnect to BLE in android when it is in range and starts advertising?

wen — Thu, 20 Nov 2014 01:41:41 GMT

when Device connect , I execute gatt.close() , gatt.disconnect , gatt = null. Is these code affect to the reconnect ?

RE: How to auto reconnect to BLE in android when it is in range and starts advertising?

Hung Bui — Wed, 19 Nov 2014 16:10:18 GMT

Hi Wen,

It should work that way. Have you make sure you didn't do anything else when the device disconnected? I heard that on some Android phone the function didn't work properly. Which phone are you testing ?

You can actually test this function using the nRF Master Control panel. There is a dropdown menu next to the Connect button where you can select "Connect with autoConnect". In my test here with the galaxy S4, the app automatically connect back when the nRF51 is turned on and advertising again.