nrf52840_Central and peripheral long_range_demo. How can I measure the sending time from the peripheral packet?

[Hun]

Hi, I'm dealing with the ble long_range_demo. Central packet gives arrival time and rssi signal through the rtt viewer. However, I am willing to know the sending time of the received packet.

How can I see the actual sending time from the peripheral packet? not an arrival time? 

[Kenneth]

Hi, the on-air time is close to neglect-able, since it will transmit at the speed of light (e.g. 100meters = 0.3us). You will not really be able to measure this time, since there are other factors that contribute more to the timing (e.g. an low frequency clock (32kHz) can have a tolerance of 100ppm will drift 100us in 1 second).

Best regards,
Kenneth