feat: v0.3.6 — PN532 driver working, badge UID read

pn532.py

@@ -122,12 +122,16 @@ class PN532_I2C:
         """Wait for ISO14443A card. Returns UID bytes or None."""
         self._send_command([PN532_CMD_INLISTPASSIVETARGET, 0x01, 0x00])
         resp = self._read_response(length=32, timeout=timeout)
-        if not resp or len(resp) < 6:
+        if not resp:
             return None
-        if resp[0] != 0x01:
+        # resp[0]=cmd_response(0x4B), resp[1]=num_targets, resp[2]=tg
+        # resp[3][4]=ATQA, resp[5]=SAK, resp[6]=uid_len, resp[7+]=UID
+        if len(resp) < 8:
             return None
-        uid_len = resp[4]
-        return bytes(resp[5:5 + uid_len])
+        if resp[1] != 0x01:
+            return None
+        uid_len = resp[6]
+        return bytes(resp[7:7 + uid_len])
 
     def read_uid(self, timeout=500) -> bytes:
         return self.read_passive_target(timeout=timeout)