How to two ble devices connect with one android phone at same time?

RE: How to two ble devices connect with one android phone at same time?

runninghorse — Sat, 08 Jul 2017 12:37:16 GMT

I want to connect two ble devices to an Android phone at the same time. I created a BluetoothGatt object and a callback for each device. The two connections were established, but the android phone could not receive the data from any device. I tested github.com/.../Android-nRF-Connect, it worked fine, but its code is not available. I even tried github.com/.../Android-nRF-Toolbox, but the Proximity Monitor could not find the two devices. Any suggestion? Should i connect in different Service or Thread?

RE: How to two ble devices connect with one android phone at same time?

MartinBL — Thu, 24 Sep 2015 11:16:24 GMT

If I understand the image in your link correctly, you simply want to make an Android app that connects to two (or more) BLE peripherals (for example two watches). As Aleksander writes in his thorough reply the answer is: Yes it is i possible to do, but No we don't provide or know of any examples. Aleksander is giving you some good tips on how to do it though. If you haven't seen them already these are all the examples we provide at the moment: Nordic's github.

RE: How to two ble devices connect with one android phone at same time?

whiteknight — Thu, 24 Sep 2015 10:50:53 GMT

Thank your replay. But My issue is below , drive.google.com/.../view It make you clear my requirement.

RE: How to two ble devices connect with one android phone at same time?

Aleksander Nowakowski — Thu, 24 Sep 2015 08:57:29 GMT

Hi,

Yes, Android devices, since Android version 4.3, may connect to more then one Bluetooth Smart device. You may try it with nRF Master Control Panel application; after connecting to the first one select another one, and another one, in the drop down at the top. I've tested it against some phones I have and reached a limit of 6 devices on Nexus 5, but connected easily to 8 on a Samsung phone. So the maximum number of simultaneously connected devices depends on the chip vendor.

From the developer point of view it's not very hard. You do exactly the same operations, but more than ones. For each device you are connected to you should have a BluetoothGatt object and a callback. You may even use the same callback as you get the gatt object as a parameter. You may try it with nRF Toolbox application (available on Google Play and GitHub). Each profile allows you right now to connect only to a single device, but in most of them you may go back to the menu, open another profile and connect to a different device. In case of nRF Toolbox there will be a separate service for each connected device, but this is not necessary, as I said before. Profiles that support 'background connection' are those where the service is used: UART, CSC, RSC, HTS, PROXIMITY.

Currently I don't have any examples of an app that illustrates it better, but we plan to add support for multiple proximity devices in the PROXIMITY profile. This may take some time (few months) however.

RE: How to two ble devices connect with one android phone at same time?

whiteknight — Thu, 24 Sep 2015 02:07:51 GMT

Thank your reply,But below link is my issue: drive.google.com/.../view

please check ,red font text is my problem .

RE: How to two ble devices connect with one android phone at same time?

MartinBL — Wed, 23 Sep 2015 08:50:35 GMT

I am not sure if I understand your questions, but:

Some newer Android phones can act as a Bluetooth Low Energy peripheral.
You can have several Bluetooth Low Energy peripherals (of any kind) connected to a central.
Android phones can act as a Bluetooth Low Energy central.
Are you talking about a headset like this: Nokia Purity? Headsets like these does not use Bluetooth Low Energy.
There should not be a problem connecting a headset using a different Bluetooth version than Bluetooth Low Energy and a Bluetooth Low Energy peripheral to an Android phone.

RE: How to two ble devices connect with one android phone at same time?

whiteknight — Tue, 22 Sep 2015 06:15:36 GMT

the search link that you supply , i even researched for a long period. without any good solution in result.

Only a condition can be implemented. 2 ble Android phone(play as Peripherals ) connect with 1 ble android phone (play as central ). But the solution is wroing , i want to 2 ble pure headset or watch devices connect with a ble android phone!!

RE: How to two ble devices connect with one android phone at same time?

MartinBL — Mon, 21 Sep 2015 09:40:08 GMT

Hi. Yes, that should be possible. I don't know of any examples though, but a google search gives you a few places to start: android bluetooth low energy multiple connections.