ESP8266 and which Pin's can be used?

[4711Austria]

Hello!

https://www.amazon.de/gp/product/B0754N ... UTF8&psc=1

Which can be used for Inputs/Outputs.
D1 and D2 are blocked for I2C and SHT31.
I need 2 Inputs and 4 Outputs.
Which Dx should I use for, Inputs with internal Pullup switched to ground. Outputs to a 4 Relais board.

THX !!

[TD-er]

See: https://espeasy.readthedocs.io/en/lates ... on-esp8266

Options are disabled if they are used for some other purpose.
In your screenshot GPIO-4 and -5 are disabled since they are assigned to I2C in the Hardware tab.
If you don't use I2C you can set the SDA and SCL pins there to "none" so you can use those GPIO pins for other purposes.

The disabled pins also have the conflict reason shown.
The pins with a warning symbol may not be the best to use for all purposes.
For example GPIO-2 does need to be pulled-up during boot. (explained on the link above)