RE: BLE service configuration help requiered. Update speed over 100hz

haakonsh — Wed, 12 Aug 2020 14:20:32 GMT

Sorry for the late reply, I'm glad you've fixed your issue. If you need a higher throughput you can increase the packet size by increasing the MTU size and enabling Data Length Extensions.

The Nordic Uart Service example shows how you can achieve good throughout when you've got a fair bit of data to send.

RE: BLE service configuration help requiered. Update speed over 100hz

Tuko305 — Wed, 12 Aug 2020 10:40:34 GMT

Some advice on building that app and some pointers would be welcomed.

But I fixed my issues. Apparently calling the sd_ble_gatts_hvx(). creates a package and sends it... so I was sending 4bytes of data per package and sending many many packages per conn interval, from what I understood from deeper reading is that phones usually only accept 6-7 package per conn interval. So those packages would be taken almost instantly by the fastest services.

So I am now consolidating data before sending it. I do three readings at 10ms intervals and send them on the third, I put conn interval to be 30ms so that I can send my data without having to wait, or skipping conn intervals, this time as 18bytes almost filling the 20bytes default package limit. (changed from floats to int16).

Seems to resolve my main issue. All services update fine, when all are active.