diff --git a/tryme.py b/tryme.py
new file mode 100644
index 0000000..2b17600
--- /dev/null
+++ b/tryme.py
@@ -0,0 +1,38 @@
+from fido2.pcsc import CtapPcscDevice
+from fido2.utils import sha256
+from fido2.ctap1 import Ctap1
+import sys
+
+
+dev = next(CtapPcscDevice.list_devices(), None)
+if not dev:
+    print("No NFC u2f device found")
+    sys.exit(1)
+
+chal = sha256(b"AAA")
+appid = sha256(b"BBB")
+
+ctap1 = Ctap1(dev)
+
+print("version:", ctap1.get_version())
+
+# True - make extended APDU and send it to key
+# ISO 7816-3:2006. page 33, 12.1.3 Decoding conventions for command APDUs
+# ISO 7816-3:2006. page 34, 12.2 Command-response pair transmission by T=0
+# False - make group of short (less than 255 bytes length) APDU
+# and send them to key. ISO 7816-3:2005, page 9, 5.1.1.1 Command chaining
+dev.use_ext_apdu = False
+
+reg = ctap1.register(chal, appid)
+print("register:", reg)
+
+
+reg.verify(appid, chal)
+print("Register message verify OK")
+
+
+auth = ctap1.authenticate(chal, appid, reg.key_handle)
+print("authenticate result: ", auth)
+
+res = auth.verify(appid, chal, reg.public_key)
+print("Authenticate message verify OK")
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