diff --git a/src/RS485.h b/src/RS485.h
index cc298b2..8d01799 100644
--- a/src/RS485.h
+++ b/src/RS485.h
@@ -36,6 +36,9 @@
 #elif ARDUINO_NANO_RP2040_CONNECT
 #define RS485_DEFAULT_DE_PIN A1
 #define RS485_DEFAULT_RE_PIN A0
+#elif ARDUINO_SAMD_ZERO
+#define RS485_DEFAULT_DE_PIN A4
+#define RS485_DEFAULT_RE_PIN A5
 #else
 #ifndef RS485_DEFAULT_DE_PIN
 #define RS485_DEFAULT_DE_PIN A6