Hardware Timer didnt work https://github.com/khoih-prog/ESP8266TimerInterrupt#why-using-isr-based-hardware-timer-interrupt-is-better

=> Software Timer https://ullisroboterseite.de/esp8266-timing.html#timer




### __Zum aktivieren von GDBStub:__
```c
#include <GDBStub.h>

...

void setup() {
  Serial.begin(460800);
  gdbstub_init();
```

### __Achtung !__
GDB muss dafür compiled werden
GDB-Version aus Arduino Toolchain hat Support

```sh
$ ./start_xtensa_gdb_stub.sh
```