diff --git a/cores/esp32/esp32-hal.h b/cores/esp32/esp32-hal.h
index d80bf2f15de..31db2354a8f 100644
--- a/cores/esp32/esp32-hal.h
+++ b/cores/esp32/esp32-hal.h
@@ -135,6 +135,18 @@ void arduino_phy_init();
 void initArduino();
 #endif
 
+// defines a constant that can be used to map BOOT pin for each different ESP32 SoC
+#if CONFIG_IDF_TARGET_ESP32 || CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3
+const uint8_t BOOT_PIN = 0;
+#elif CONFIG_IDF_TARGET_ESP32P4
+const uint8_t BOOT_PIN = 35;
+#else
+// All other series C and H SoC use GPIO 9 as BOOT PIN
+const uint8_t BOOT_PIN = 9;
+#endif
+
+
+
 typedef struct {
   int core;                    // core which triggered panic
   const char *reason;          // exception string