Slave Multi Connection CC2650

Hi Tom, thanks for the reply,

One master will probably be a CC2541 and the other one a CC2650.

I changed the MAX_NUM_BLE_CONNS but I still can't connect to the two masters at the same time. I cannot see the device advertising while he already is connected to another device even though I call the HidDev_StartAdvertising();

I'm worried that I could be in that case (note in the ble_user_config.h) :
-When the GAP role includes Peripheral and no v4.1 Controller features are configured, MAX_NUM_BLE_CONNS must not be greater than 1

Is there examples of multiple connections on the stack and especially a slave that can be connected to 2 masters at the time.

Thanks in advance,

Sylvain

I am interrested : I want to connect a CC2640 to 2 master phones.
Similar questions are often replied with "see the multirole example". But this is not a fully satisfying answer :
1) multirole is not what I need (it's overkill, I just want to program a slave connectable by 2 master).
2) there is no documentation about how this example works : I tried it and checked that I can connect 2 masters, good, but I still don't understand what makes it work better than the "simplePeripheral example + increased MAX_NUM_BLE_CONNS + stack with v4.1 feature".

Hi Philippe, 

Did you succeed to connect to your 2 masters phone? I still can't do it on my side!

Thanks in advance

Sylvain

Hi Sylvain,

Yes, I managed to connect 2 masters phone to the CC2640 as peripheral.

1)  In the stack file "build_config.opt", uncomment the V41_CTRL_CFG feature

2)  set the MAX_NUM_BLE_CONNS to 2 in the predefined preprocessor symbols

3) Then most of the work is related to the gapRole implementation (file "peripheral.c"). The one delivered with the simple-peripheral example is really not compatible with a multi-master set-up but I managed to make it "pretty much work" with only a few modifications, though I suspect a lot more work has to be done to improve stability.

Since then I made more modifications specific to my use-case, so I will try to remember only the relevant ones :

- in function GAPRole_SetParameter(...) , case GAPROLE_ADVERT_ENABLED: change the condition for calling gapRole_setEvent(START_ADVERTISING_EVT), instead, compare linkDB_NumActive() with MAX_NUM_BLE_CONNS

- in function gapRole_processGAPMsg(...) , case GAP_LINK_ESTABLISHED_EVENT: re-enable the advertising by calling to GAPRole_setParameter(GAPROLE_ADVERT_ENABLE,...)

- in function GAPRole_sendUpdateParam(...), do not return bleNotConnected if gapRole_state is GAPROLE_CONNECTED_ADV

I found these modifications by comparing with the multirole example, which is indeed better adapted to multiconnections. It would be great if TI could deliver a BLE stack "developper's guide" documentation based on this example.

Hi All,

I am using CC2640R2 stack (1_30_00_25) - Host_test project. I need to create the BLE module as peripheral and i need to connect with 2 Central (IOS application).

But i can able to connect with only one iphone , I have changed the MAX_BLE_Conn = 8 and i can able to see the adv pkt after connecting with one IOS application in BTOOL and NRF connect application.

But i can't able to connect with the second device. when i am sending Establish link request i am not getting any event from BLE board.

I need to know i am missing any configuration (Macros) to define. Any one give me solution for this issue. Waiting for your reply.

Thanks in advance,

Hi Shri,

MAX_BLE_CONN is not the only change you have to make in order to be able to connect to multiple devices.
You shoud try to follow alll the changes I gave in my previous post.

Sylvain