convert NSMutableData to NSData
-(NSData*)FunTest{ NSMutableData *theData = [NSMutableData data]; char bytesToAppend[5] = {0x01, 0xf0, 0x64, 0x0, 0x6a}; [theData appendBytes:bytesToAppend length:sizeof(bytesToAppend)]; [theData appendBytes:bytesToAppend length:sizeof(bytesToAppend)];…