How to transfer a lot of data with your phone's bluetooth?

[odenwar]

I wanted to increase the bandwidth of bluetooth using the following example, but there is a limit of only 1 board.

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fsdk_nrf5_v17.0.2%2Fble_sdk_app_att_mtu.html&cp=7_1_4_2_1_0

Please tell me how to connect and work with a mobile phone.

[Eugene Yu]

There are multiple factors related to the throughput.

1. Data rate
2. Data Length Extension
3. Connection interval
4. etc

These factors are already supporting in the example that you shared.

So I recommend you check the configuration in the example of how it configures the data rate, ATT MTU size, and Connection interval.

One thing you need to know that the throughput result will be shown according to the mobile device that you selected due to each mobile OS(Android 11.25ms/iOS 30ms) has different connection intervals.

and, The most of latest mobile devices are supporting the 2Mbps, DLE feature itself.

To verify the configuration on run time, you can use the nRF Sniffer to capture the air packets.

This link also might help you.

[Kenneth]

Also check out: https://www.novelbits.io/bluetooth-5-speed-maximum-throughput/