Multiple slave support for nRF TOOLBOX proximity application

[Bibin]

Hi, I have tested the nRF Toolbox proximity application using nrf51822 evaluation kit and with nexus4 smartphone it is working fine. Now my question is, is it possible to modify the proximity application in nrf toolbox to support multiple slave's as in ios nRF proximity application? if it is possible, how it can be done?

[Hung Bui]

Hi Bibin, I am sorry for the late response.

Yes it's possible to handle multiple slaves with a single app. You would need to handle each slave with one BluetoothGatt instance. You would also need specific BluetoothGattCallback for each slave you connect to. Please note that if you have BluetoothGattServer implemented in your app, all slaves will share same server on the phone.

Let me know if there is any issue.

[balaji]

If possible please provide some sample code or document regarding this.

[Hung Bui]

@Balaji: Unfortunately at this moment we don't have an example for that. However, it's should not be too hard to implement. When you call

public BluetoothGatt BluetoothDevice.connectGatt (Context context, boolean autoConnect, BluetoothGattCallback callback)

for each device you connect to, you will receive an instance of BluetoothGatt for that connection, and can assign a separated call back for that connection.

[balaji]

If single gattserver is shared by multiple slaves i connect, when i need to open and close that gattserver in application? and what i need to do when i connect and disconnect a device (from gattserver's point)?

[Hung Bui]

@Balaji: could you open a new question and provide more information on what you need ? You don't need to open and close a new Gattserver when there are more client connected. They are connected to the same gattserver.

[Eric]

Hi, I tried to follow the specifications of Mr. Hung Bui to connect most Bluetooth devices at the same time but with poor results. have you some sample code or document about this?