From 36780087b6725b91669a612b227321045fbcf958 Mon Sep 17 00:00:00 2001
From: Sucareto <28331534+Sucareto@users.noreply.github.com>
Date: Thu, 25 May 2023 12:10:30 +0800
Subject: [PATCH] =?UTF-8?q?=E5=B1=8F=E8=94=BD=E9=9D=9E=E6=A0=87=E5=87=86?=
 =?UTF-8?q?=20aime=E3=80=81banapass=20=E5=8D=A1=E3=80=82=20SAK=20=E5=88=97?=
 =?UTF-8?q?=E8=A1=A8=EF=BC=9Ahttps://www.nxp.com/docs/en/application-note/?=
 =?UTF-8?q?AN10833.pdf#page=3D11?=
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---
 src/PN532.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/PN532.cpp b/src/PN532.cpp
index f4df823..c9d16d7 100644
--- a/src/PN532.cpp
+++ b/src/PN532.cpp
@@ -242,6 +242,9 @@ bool PN532::readPassiveTargetID(uint8_t cardbaudrate, uint8_t *uid, uint8_t *uid
   if (pn532_packetbuffer[0] != 1)
     return 0;
 
+  if (pn532_packetbuffer[4] != 0x08) // SAK == 0x08
+    return 0;
+
   uint16_t sens_res = pn532_packetbuffer[2];
   sens_res <<= 8;
   sens_res |= pn532_packetbuffer[3];