two NRF51822 communication fails sometimes

[phob]

Hi, I am using 2 nrf51822 devices. one is central and other one is peripheral. I am using s130 softdevice. When i was trying to connect NRF51822 to other nrf51822. i tried for 1st time then communication happens. But later communication happens once in 10 time.

But when i was trying to connec NRF51822 with NRF52 DK board NRF51822 was central and NRF52 DK was peripheral. That time communihcation was happening everytime.

What could be the problem.

[endnode]

I suggest to get some BLE radio traces of these unsuccessful connections to see where could be a problem. Of course having debug trace of events and SD API call from the FWs would help as well...

[run_ar]

@ephobbyiest Can you verify if the central receives the advertisement packets from the nRF51 Peripheral? What is the RSSI? Is this a Nordic nRF51 DK or custom HW?