detect if a packet is lost and retransmitted

[JenR]

I am developing a time sensitive application using multiple peripherals that are sending sensor data to a central using softdevice 15.0.

Every connection interval I should get data from every peripheral. Sometimes a packet is not received (interference or other problems) and is resent in one of the following connection intervals. Is there a way to detect if a packet is a retransmitted packet and how old the packet is? I would like to know how many connection intervals ago it should originally have been sent.

[bjorn-spockeli]

Hi JenR, 

our SoftDevices does currently not expose any Link Quality information through its API. Hence, there is no way to know know if a packet has been re-transmitted or not. 

Best regards

Bjørn

[JenR]

Ok, thx for the quick reply!

Are there any plans to add LQI information to the softdevice in the future?

For now I will try to keep track of which packages I have received at which time to detect when an older packet is received.

[Denna]

I have the same question, but since this is an old response I'm wondering if the answer given is still accurate for the latest nRF5 Bluetooth LE SDK and Soft Device version.