ESP8266 Community Forum

- Thu Sep 22, 2016 6:12 am #55496 Hello there,
Im new with ESP8266 developing, and i started to use ESP12-F with some arduino experience.

First sketch i tried to is pushbutton - assigned GPIO16 as input , wired 1k pullup resistor from VCC to GPIO16 and pushbutton from the ground to GPIO16 - but it seems that there is no reaction at all when i press the button.

Is there something im doing wrong here ?

- Thu Sep 22, 2016 11:24 am #55518 Maybe if you paste the code you are using. Have you tried any other inputs?

I'm not aware of any reason for it to not work.

- Thu Sep 22, 2016 12:01 pm #55523 Simple digital read and serial print to check current value.

Is is possible to use internal pullups to skip resistor? Like INPUT_PULLUP ?

- Fri Sep 23, 2016 7:29 am #55563 It is possible to use internal weak pullups, but the switch need to be nearby.
On long wire length to the switch, or in harsh environment, you will get noise into GPIO producing false reading, in such case use strong external pullups.