User Activity

How would i send apdu to multiple detected devices? I believe I should use the rfalIsoDepPollAHandleActivation() function with different DID values. I couldn't find much documentation on DID other than it's used to determine which device to activate ...
I have ported rfal platform to work on my esp32 and have successfully detected all kinds of cards. Now I want to send select APDU message to the phone but I am unsucessful at doing so.The code I have used: err = rfal_nfc.rfalIsoDepPollAHandleActivati...