From c871d243f34fd8bf4fa5a7c37858023669966461 Mon Sep 17 00:00:00 2001
From: merlokk <olegmsn@gmail.com>
Date: Wed, 1 Nov 2017 18:05:22 +0200
Subject: [PATCH] maybe like this

---
 armsrc/iso14443a.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index 08aa7076..e5c56ec5 100644
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -1820,11 +1820,8 @@ int iso14443a_select_card(byte_t *uid_ptr, iso14a_card_select_t *p_hi14a_card, u
 		p_hi14a_card->sak = sak;
 	}
 
-	// non iso14443a compliant tag
-	// https://www.nxp.com/docs/en/application-note/AN10834.pdf page 7
-	if( (sak & 0x20) != 0) return 2; 
-
-	if (!no_rats) {
+	// PICC compilant with iso14443a-4 ---> (SAK & 0x20 != 0)
+	if (sak & 0x20 && !no_rats) {
 		// Request for answer to select
 		AppendCrc14443a(rats, 2);
 		ReaderTransmit(rats, sizeof(rats), NULL);