#include //Comment out the definition below if you don't want to use the ESP8266 gdb stub. #define ESP8266_USE_GDB_STUB void setup() { pinMode(LED_BUILTIN, OUTPUT); #ifdef ESP8266_USE_GDB_STUB #if !defined(GDBSTUB_BREAK_ON_INIT) || !GDBSTUB_BREAK_ON_INIT printf("WARNING! The ESP8266 GDB stub will not wait for gdb during startup. Please add GDBSTUB_BREAK_ON_INIT=1 to Extra Preprocessor Macros.\n"); #endif gdbstub_init(); #endif } void loop() { digitalWrite(LED_BUILTIN, HIGH); delay(1000); digitalWrite(LED_BUILTIN, LOW); delay(1000); }