Increase BLE throughput GATT HR service

RE: Increase BLE throughput GATT HR service

1337bit — Fri, 08 Jul 2022 13:43:44 GMT

Yes I need to stream the data in real-time in a GUI on the Ubuntu machine, so at the moment I will try if these configurations are suitable/stable. Thank you for suggesting you blog, very interesting!

RE: Increase BLE throughput GATT HR service

Hung Bui — Fri, 08 Jul 2022 13:21:12 GMT

Hi 1337bit,

By decreasing the connection interval you would definitely have lower latency.

However it may not be directly translate to higher data rate.

Do you have a real time requirement, it's better to group the data into a larger packet and send it.
You can think of adding a time stamp.

So instead of sending 250 packets with 1 byte each, you can send one 250 bytes packet every second.

Regarding improving the throughput I would suggest to have a look at my blog here.

RE: Increase BLE throughput GATT HR service

1337bit — Fri, 08 Jul 2022 10:55:36 GMT

Okay adding this configurations to the prj.conf:

CONFIG_BT_GAP_PERIPHERAL_PREF_PARAMS=y
CONFIG_BT_PERIPHERAL_PREF_MIN_INT=6
CONFIG_BT_PERIPHERAL_PREF_MAX_INT=6

increased the throughput to about 300Hz!

Is this the correct method, or should I look into something else?

RE: Increase BLE throughput GATT HR service

1337bit — Fri, 08 Jul 2022 08:26:23 GMT

P.S.: I am using the nRF Connect for VS Code Extension Pack (v2022.5.1) with nRF Connect SDK 2.0.0 and Zephyr latest SDK