Maximum data throughput.

[Jorge]

I wanted to know what's the maximum data throughput if one device has both roles (Client/Server) working at the same time. I already saw the tables for the different SoftDevices (s110, s120 and s130) but not sure if the maximums they display are for one way only or for the two. I want to use this so I'm able to full duplex audio transfer over BLE, but want to know what's the maximum data I can send/receive on both sides (Central/Peripheral). thanks in advance for your answers

[FormerMember]

S130 and S132 v.2.0 supports up to 6 packets per connection interval per connection, no matter if the device is central or peripheral. However, the minimum connection interval depends on the number of connected links.

For one connected link, central or peripheral, the minimum connection interval is 7.5 ms.

For two links, the minimum connection interval is 15 ms if you want to be able to transmit 6 packets per connection interval per link.

As you understand, if you want to be able to transmit 6 packets per connection interval, the connection interval has to be at least total number of connected links * 7.5 ms. The reason is that it requires some time to transmit packets over the air, and more packets to transmit, more links, require more time.

[Jorge]

I now have a lot more on my project and it isn't easy to change the code to do the measures. But if you want you can do a workaround to if the packet is not sent correctly send it again. this way you are not going to have packet loss. And the throughput shouldn't change a lot. it can decrease a bit, but I think is not going to lower so much.

regarding the new softdevice, I didn't hear about it, not sure if it has to do, already, with the new Bluetooth 5, but if you can support 250 bytes packet size on the same interval connection is a increase of 12.5 times.