max out the speed of storage syncs via ble

[beastoin]

currently:

• cv1: 5KB/s
• devkit2: 15KB/s

it's bad.

should be: ~30KB/s

-- why 30? phy 2M, ble mtu 220, ci 30ms, 5 packages/ci ~ 36KB/s

x2 if you can request the mtu 440

[0xkelvin]

We need to evaluate the read/write SD Card performance on cv1 and devkit2, the bottle neck is SPI protocol to SD Card. I have on hand devkit2, let me measure

the QSPI with external flash memory will give it much higher performance.

[0xkelvin]

another improvement should applied https://github.com/BasedHardware/omi/issues/3450 to solve this sync speed

[0xkelvin]

this improvement with help speed up syncs via ble

also reduce load for ble stack, not a lot of retry needed

[beastoin]

this ticket relates to storage.c, not transport.c.

keep exploring:

• transport.c > pusher -> real time audio bytes from device's mic -> phone's app

• storage.c -> storage syncs the audio bytes from device's sd card -> phone's app

[aaravgarg]

@TuEmb is this done btw

[TuEmb]

the PR https://github.com/BasedHardware/omi/pull/3511 solved that @aaravgarg

[aaravgarg]

Sounds good, closed the issue.