bt_latency_experiments

Bluetooth latency experiments between two Raspberry Pi Picos

Setup

• two pico-w
• connected via SPI cable

Build

• currently requires develop branch of BlueKitchen Bluetooth stack -- <path_to_pico_sdk>$ git submodule update --init -- <path_to_pico_sdk>/lib/btstack$ git checkout develop

• cmake -DPICO_SDK_PATH=<path_to_pico_sdk_with_develop_branch_of_bluekitchen_bluetooth_stack> -DPICO_BOARD=pico_w ..

• make

• picotool load host/host.uf2

• picotool load client/client.uf2

Results

Delay ms	Average	Min.	Max. Latency ms
1000	15	3.5	27.4
100	15.5	3.5	27.5
10	13	3.1	25.5
5	7.2	3.1	24.5
1	3.5	3.1	3.9