ESP8266 Community Forum

I do not know if all pins can be use as inputs. Because that was my problem. I was using D8 as input and it cause me a constant reset.

I will read the datasheet to look pins information.

Thanks for your help.

This Wiki page is there since years :
wiki/doku.php?id=esp8266_gpio_pin_allocations
You will see there that what I said earlier that GPIO15 should be LOW to boot properly, along with GPIO2/GPIO0 to HIGH.

Thanks martinayotte,