diff --git a/main/main.h b/main/main.h
index ae14c92..1772c06 100644
--- a/main/main.h
+++ b/main/main.h
@@ -14,6 +14,10 @@
 #include <stdio.h>
 #include <string.h>
 
+#ifdef CONFIG_IDF_TARGET_ESP32S3
 #define MASTER_MODE_PIN GPIO_NUM_1 // Jumper-Erkennungspin
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define MASTER_MODE_PIN GPIO_NUM_0 // Jumper-Erkennungspin
+#endif
 
 #endif
diff --git a/main/uart_handler.h b/main/uart_handler.h
index c89a15b..2444838 100644
--- a/main/uart_handler.h
+++ b/main/uart_handler.h
@@ -6,9 +6,15 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#ifdef CONFIG_IDF_TARGET_ESP32S3
 #define MASTER_UART UART_NUM_1
 #define TXD_PIN (GPIO_NUM_2)
 #define RXD_PIN (GPIO_NUM_3)
+#elif CONFIG_IDF_TARGET_ESP32C3
+#define MASTER_UART UART_NUM_1
+#define TXD_PIN (GPIO_NUM_1)
+#define RXD_PIN (GPIO_NUM_2)
+#endif
 
 #define BUF_SIZE (256)