Multiple connections with iso timer synchronization

[jvmreis]

I am using the sample code from Nordic SDK v2.6.99-cs2 Bluetooth: ISO time synchronization.

I am trying to use the sample in broadcast isochronous streams mode by placing 2 development kits simulating sensors in beacon mode by typing either b in the terminal emulator. and another one as receivers of the broadcast isochronous stream.type r in the terminal.

I made the following changes:

definition #define CONFIG_BT_ISO_MAX_CHAN 1 to 4

#define CONFIG_BT_ISO_SYNC_RECEIVER 1 to 2
but I still do not receive the two sensor information from the beacon on the receiver. the receiver connects to only one of the beacons and does not try to connect to another.

Here are the questions:

1) analyzing the code, the receiver connects only with one address of bis_channels. Does this mean that the receiver can only synchronize one connection channel?

When I create a new bt_iso_big_sync(sync, &big_sync_param, &big); with another address, the error code appears. Why does this happen?

2) I want to create a network with two sensors sending temperature information (each with its own temperature), one on each channel but both synchronized. Is this possible using iso timer synchronization?

[Elfving]

Hi,

I am using the sample code from Nordic SDK v2.6.99-cs2 Bluetooth: ISO time synchronization.

Sorry for the cop-out answer from me here, but could you try the same thing with a tagged version of NCS? Release candidates and main-branch etc. could have issues, that can be annoying to debug in case the issue is allready solved in eg. 2.7, which is already released.

Besides this, are you seeing the sample otherwise working as it should regarding what is outlined here in the "Testing" part of the documentation?

Regards.

Elfving

[jvmreis]

i test with a Nordic SDK v2.7.99-cs1 and i had the same problem. 

I saw this here in the .readme. The receiver only receives 1 transmitter even if the amount of CONFIG_BT_ISO_MAX_CHAN is increased? Why is there this limitation?

  

Besides this, are you seeing the sample otherwise working as it should regarding what is outlined here in the "Testing" part of the documentation?

Yes, I am following this documentation and the program works as described, however, I want to edit it so that a receiver can receive more than one transmitter.

[Elfving]

Could you try this with NCS 2.7.0 as well? The .99 part is what I am trying to avoid, just because of the chance that there is some bug in the main branches.

Regards,

Elfving

[jvmreis]

I changed the NCS version to 2.7.0 but it didn't work. The receiver code structure remains the same. My problem is that I want to activate two reception channels on the receiver so that each one can receive data from a sensor. However, from what I saw in the code, the receiver is limited to receiving only one channel. I'm having difficulty implementing this part. I would like to know if the hardware or the SDK has any limitations that prevent this implementation.

when I try to start two channels on the receiver, it only connects with the first index and the second index gives an initialization error