nRF52832 ble_app_uart maximum throughput

[Vishnu Pradeep]

Hi,

I am trying to implement an ECG measurement device. nRF52832 collects the sensor value through SPI and send it to smartphone using ble_app_uart code. I need to send at least 30 bytes of information at a time with minimum time interval possible(less than 5ms). Is this attainable? What is the limiting values in iOS and android?

[Petter Myhre]

The minimum connection interval is per spec 7.5ms, so 5ms is not possible. Do you require 5 ms latency? What throughput do you require? See this for how to calculate throughput, and see Section 1.9 in the pdf found here, for packets per connection interval for Android and iOS.

[Vishnu Pradeep]

It is not just about the throughput. I need to send a minimum of 30 bytes every 5ms or less so as to plot the real time readings. The ECG will be more accurate if I can send more values instantaneously.

[Petter Myhre]

The minimum connection interval is per spec 7.5ms, so 5ms is not possible.