RE: Transfer binary data over BLE

MartinBL — Thu, 23 Aug 2018 11:10:14 GMT

Hi,

Have you made sure to optimize your connection parameters and bandwidth settings? This is an informative blog that goes through the various aspects of tweaking the bandwidth: Bluetooth 5 speed: How to achieve maximum throughput for your BLE application.

Here are a few tables showing what bandwidths you can expect: Bluetooth low energy data throughput. Note though, that the values in the tables are measured between two nRF52840's. Your phone, tablet, computer, etc. do not necessarily support the same bandwidths and you can never expect to get the same throughput between all devices.

It is not necessarily true that the UART example only sends one byte at a time. You can tweak all the bandwidth parameters on that example as with any other, and it can be a good place to start if you want to transmit a lot of custom data. You might also be interested in the Experimental: ATT_MTU Throughput Example.