warning while sudo make all

[earth08]

RFSniffer.cpp: In function ‘int main(int, char**)’:
RFSniffer.cpp:51:63: warning: format ‘%i’ expects argument of type ‘int’, but argument 2 has type ‘long unsigned int’ [-Wformat=]
printf("Received %i\n", mySwitch.getReceivedValue() );

cant decodes code by sudo ./RFSniffer on orange Pi plus 2e
cant get codes on screen when sudo ./RFSniffer
cant receive codes.

Please guide