Identity IoT: initial release — boot manager, provisioning, sensor/relay

provisioning_nfc.py

@@ -0,0 +1,32 @@
+# ============================================================+
+# Identity IoT — Provisioning via NFC
+# (c) Copyright : ae Aeonian Engineering Limited - Hong Kong
+# (c) Copyright : WIDE di D. Papa - Naples - Italy
+# ============================================================+
+# Used when has_nfc = True and no config.json found.
+# Waits for writer badge tap, reads AES-encrypted config payload
+# from NTAG424, decrypts with PROG_KEY/PROG_IV.
+# ============================================================+
+
+import utime
+from provisioning_server import PROG_KEY, PROG_IV
+from identity_iot_aes import aes_cbc_decrypt
+import ujson
+
+
+def run_provisioning_nfc():
+    """
+    Block until writer badge is tapped.
+    Reads encrypted config from NTAG424, returns config dict.
+    """
+    print('[provisioning_nfc] waiting for writer badge...')
+
+    # TODO: init PN532
+    # TODO: wait for NTAG424 tap
+    # TODO: read encrypted config payload from tag memory
+    # TODO: aes_cbc_decrypt(payload, PROG_KEY, PROG_IV)
+    # TODO: validate and return config dict
+
+    while True:
+        print('[provisioning_nfc] tap writer badge...')
+        utime.sleep(2)