Sending huge chunk of data from microSD to Phone (Bluetooth MTU configuration, transfer rate, etc.)

[coyodha]

Hi Nordic Dev Team,

I need suggestion on how to achieve this. My microSD saves chunks of 50kB raw data.

I would like to retrieve this data once connected to the phone, and then send them to server as the end goal.

I understand that Bluetooth transfer rate can be configured up to 2Mbps, which is around 250kB/s. So that it will approximately takes 0.2 seconds to download a chunk of my data, is that correct?

How does the MTU size affects this throughput? Default is 20Bytes, and max MTU size is 512Bytes.

What's the easiest way to configure/achieve this? Any example reference would be good.

[Kenneth]

I am going to point you to a third party blog that I think explain this well:
https://www.novelbits.io/bluetooth-5-speed-maximum-throughput/

Kenneth