From 34086ad99a86ff381dc3c4fd2454a6b7b8c3b78d Mon Sep 17 00:00:00 2001
From: Rotzbua <Rotzbua@users.noreply.github.com>
Date: Wed, 30 Dec 2020 16:18:01 +0100
Subject: [PATCH] fix wrong SPI clock speed #545

---
 src/MFRC522.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/MFRC522.h b/src/MFRC522.h
index 5ebbd27..597c4a5 100644
--- a/src/MFRC522.h
+++ b/src/MFRC522.h
@@ -19,7 +19,7 @@
 #include <SPI.h>
 
 #ifndef MFRC522_SPICLOCK
-#define MFRC522_SPICLOCK SPI_CLOCK_DIV4			// MFRC522 accept upto 10MHz
+#define MFRC522_SPICLOCK (4000000u)	// MFRC522 accept upto 10MHz, set to 4MHz.
 #endif
 
 // Firmware data for self-test