diff --git a/brmdoor_nfc.cpp b/brmdoor_nfc.cpp
index 1f4eb93..65fd701 100644
--- a/brmdoor_nfc.cpp
+++ b/brmdoor_nfc.cpp
@@ -1,14 +1,32 @@
 #include <string>
 
+#include <nfc/nfc.h>
+#include <nfc/nfc-types.h>
+
+
 #include "brmdoor_nfc.h"
 
 using namespace std;
 
 NFCDevice::NFCDevice()
 {
+    pollNr = 20;
+    pollPeriod = 2;
 }
 
 std::string NFCDevice::scanUID()
 {
     return "1234";
 }
+
+const nfc_modulation NFCDevice::_modulations[5] = {
+        { /*.nmt = */ NMT_ISO14443A, /* .nbr = */ NBR_106 },
+        { /*.nmt = */ NMT_ISO14443B, /* .nbr = */ NBR_106 },
+        { /*.nmt = */ NMT_FELICA,    /* .nbr = */ NBR_212 },
+        { /*.nmt = */ NMT_FELICA,    /* .nbr = */ NBR_424 },
+        { /*.nmt = */ NMT_JEWEL,     /* .nbr = */ NBR_106 },
+    };
+    
+const size_t _modulationsLen = 5;
+
+
diff --git a/brmdoor_nfc.h b/brmdoor_nfc.h
index a1fbd6a..db5698b 100644
--- a/brmdoor_nfc.h
+++ b/brmdoor_nfc.h
@@ -1,6 +1,10 @@
 #pragma once
 
 #include <string>
+#include <inttypes.h>
+
+#include <nfc/nfc.h>
+#include <nfc/nfc-types.h>
 
 class NFCDevice
 {
@@ -12,4 +16,14 @@ public:
     ~NFCDevice() {}
 
     std::string scanUID();
+
+    uint8_t pollNr;
+
+    uint8_t pollPeriod;
+
+protected:
+
+    static const nfc_modulation _modulations[5];    
+    static const size_t _modulationsLen = 5;
+
 };