Problem on accessing numberOfPacketsToSend parameter of SimpleLoRaApp from another module.

[lingcy0328]

I have problem on accessing numberOfPacketsToSend parameter of SimpleLoRaApp.cc from LoRaMac.cc. I need to make sure the value of numberOfPacketSend can be read on LoRaMac.cc. I tried to use:

auto *sla = check_and_cast<SimpleLoRaApp *>(getParentModule()->getParentModule()->getSubmodule("SimpleLoRaApp");
int nTSP = sla->numberOfPacketsToSend;
WATCH(nTSP); //to inspect the value of nTSP in Qtenv.

but when I run the simulation, the nTSP value showed in the Qtenv is not equal to the value I set in the .ini file (it shows around 20000 but I set only 6). Can anyone tell me what is wrong?