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i successfully use the ESP-201 to switch a 2-channel-relay board via wifi and even work as a client to update some webdata at the same time.

Now i wanted to switch more relays.

In the picture shown above there are GPIO07 - GPIO10 available on the Pins D0 - D3.

I work with the Arduino IDE - but i don't get it to work that i can use these Dx-Pins to work as GPIOs (Output).

I tried with the pinMode-command - but no success.
Even the GPIO0 i do not get to work successfully.

Do you have any hints how i can get these Pins to work as GPIO?

thanks in advance...