Add default Rx/Tx pins for ESP32 S2/3 & C3 variants (#165)

The pins are now assigned to a default value if not defined. Thanks @shaffenmeister

Co-Authored-By: shaffenmeister <shaffenmeister@users.noreply.github.com>

examples/0_MQTT_Gateway/fdrs_gateway_config.h

@@ -53,9 +53,9 @@
 #define OLED_SCL 15
 #define OLED_RST 16
 
-// UART data interface pins (if available)
-#define RXD2 14
-#define TXD2 15
+// UART data interface pins (ESP32 only)
+//#define RXD2 14
+//#define TXD2 15
 
 //#define USE_LR  // Use ESP-NOW LR mode (ESP32 only)
 

examples/1_UART_Gateway/fdrs_gateway_config.h

@@ -53,9 +53,9 @@
 #define OLED_SCL 15
 #define OLED_RST 16
 
-// UART data interface pins (if available)
-#define RXD2 14
-#define TXD2 15
+// UART data interface pins (ESP32 only)
+//#define RXD2 14
+//#define TXD2 15
 
 //#define USE_LR  // Use ESP-NOW LR mode (ESP32 only)
 

examples/2_ESPNOW_Repeater/fdrs_gateway_config.h

@@ -53,9 +53,9 @@
 #define OLED_SCL 15
 #define OLED_RST 16
 
-// UART data interface pins (if available)
-#define RXD2 14
-#define TXD2 15
+// UART data interface pins (ESP32 only)
+//#define RXD2 14
+//#define TXD2 15
 
 //#define USE_LR  // Use ESP-NOW LR mode (ESP32 only)
 

examples/3_LoRa_Repeater/fdrs_gateway_config.h

@@ -53,9 +53,9 @@
 #define OLED_SCL 15
 #define OLED_RST 16
 
-// UART data interface pins (if available)
-#define RXD2 14
-#define TXD2 15
+// UART data interface pins (ESP32 only)
+//#define RXD2 14
+//#define TXD2 15
 
 //#define USE_LR  // Use ESP-NOW LR mode (ESP32 only)
 

examples/Gateway_Examples/1_MQTT_Gateway_Ethernet/fdrs_gateway_config.h

@@ -53,9 +53,9 @@
 #define OLED_SCL 15
 #define OLED_RST 16
 
-// UART data interface pins (if available)
-#define RXD2 14
-#define TXD2 15
+// UART data interface pins (ESP32 only)
+//#define RXD2 14
+//#define TXD2 15
 
 //#define USE_LR  // Use ESP-NOW LR mode (ESP32 only)
 

src/fdrs_gateway_serial.h

@@ -6,6 +6,21 @@
 #define UART_IF Serial
 #endif
 
+#if !defined RXD2 or !defined TXD2
+    #warning Defining RXD2 and TXD2 using MCU defaults.
+    #if CONFIG_IDF_TARGET_ESP32
+        #define RXD2 14
+        #define TXD2 15
+    #elif CONFIG_IDF_TARGET_ESP32S2 or CONFIG_IDF_TARGET_ESP32S3
+        #define RXD2 18
+        #define TXD2 17
+    #elif CONFIG_IDF_TARGET_ESP32C3
+        #define RXD2 2
+        #define TXD2 3
+    #else
+        #error MCU not supported.
+    #endif
+#endif
 
 void getSerial() {
   String incomingString;