To enable the LED power with the booting of the ESP, I assume GPIO16 has to be enabled somehow.
Is there a simple way to add this command within the platformio.ini? Or do I have to add sth. within the source code to make this work?
What about assigning the relay output to GPIO16?
Will that give you the control you need?
Checkout: Control a Relay - WLED Project in the docs for more details.
You may have to play with Normally On or Off settings.
Some GPIOs will output PWM or debug info at boot. Check the Espressif documentation.
Other GPIOs will be able to output signal when firmware loads.
Thanks, that simply did the trick