Added alt pin selection for ESP8266

Author: Kevin Townsend

examples/buildtest/buildtest.ino

@@ -2,7 +2,11 @@
 #include <Adafruit_MFRC630.h>
 
 /* Indicate the pin number where PDOWN is connected. */
+#if defined(ESP8266)
+#define PDOWN_PIN         (A0)
+#else
 #define PDOWN_PIN         (A2)
+#endif
 
 /* Show me some mojic! */
 #define MOJIC_TRICK       (0)

examples/mifare1K_dump_serial/mifare1K_dump_serial.ino

@@ -1,7 +1,11 @@
 #include <Adafruit_MFRC630.h>
 
-/* Indicate the pin numbers where PDOWN/RX/TW are connected. */
+/* Indicate the pin number where PDOWN is connected. */
+#if defined(ESP8266)
+#define PDOWN_PIN         (A0)
+#else
 #define PDOWN_PIN         (A2)
+#endif
 
 /* Use UART */
 Adafruit_MFRC630 rfid = Adafruit_MFRC630(&Serial1, PDOWN_PIN);

examples/mifare1k_dump/mifare1k_dump.ino

@@ -2,7 +2,11 @@
 #include <Adafruit_MFRC630.h>
 
 /* Indicate the pin number where PDOWN is connected. */
+#if defined(ESP8266)
+#define PDOWN_PIN         (A0)
+#else
 #define PDOWN_PIN         (A2)
+#endif
 
 /* Use the default I2C address */
 Adafruit_MFRC630 rfid = Adafruit_MFRC630(MFRC630_I2C_ADDR, PDOWN_PIN);

examples/mifare1k_dump_spi/mifare1k_dump_spi.ino

@@ -1,9 +1,14 @@
 #include <Wire.h>
 #include <Adafruit_MFRC630.h>
 
-/* Indicate the pin number where PDOWN and CS/SSEL are connected. */
+/* Indicate the pin number where PDOWN is connected. */
+#if defined(ESP8266)
+#define PDOWN_PIN         (A0)
+#define SSEL_PIN          (15)
+#else
 #define PDOWN_PIN         (A2)
 #define SSEL_PIN          (A4)
+#endif
 
 /* Use HW SPI */
 Adafruit_MFRC630 rfid = Adafruit_MFRC630(MFRC630_TRANSPORT_SPI,

examples/ntag213_dump/ntag213_dump.ino

@@ -2,7 +2,11 @@
 #include <Adafruit_MFRC630.h>
 
 /* Indicate the pin number where PDOWN is connected. */
+#if defined(ESP8266)
+#define PDOWN_PIN         (A0)
+#else
 #define PDOWN_PIN         (A2)
+#endif
 
 /* Use the default I2C address */
 Adafruit_MFRC630 rfid = Adafruit_MFRC630(MFRC630_I2C_ADDR, PDOWN_PIN);