ESP8266 Community Forum

- Thu Apr 02, 2015 7:38 am #13265 Good day,
node.key and node.led have been removed from the API. I can work out how to turn the LED on and off (

Code: Select allgpio.write(0, 1)

) but I can not work out how to read button presses.

Cheers,
Michael

- Fri Apr 03, 2015 8:33 am #13357 Moin,

I would expect https://github.com/nodemcu/nodemcu-firm ... n#gpioread to provide what you want.

Or did I miss something?

Carsten

Good day,
node.key and node.led have been removed from the API. I can work out how to turn the LED on and off (

Code: Select allgpio.write(0, 1)

) but I can not work out how to read button presses.

Cheers,
Michael

Get your modules here:

https://www.banggood.com/custlink/KvGGhGF4wG

- Tue Apr 07, 2015 9:55 am #13762 I've tried reading from 0 but it always returns zero. It also does not provide a trigger when the button is pressed. The api for "key" suggests that it fires an event. Trigger seams to be the api for that but it is not supported for this pin.

Thanks.

- Wed Apr 08, 2015 10:33 am #13879

I can not work out how to read button presses.

I've never used the 'official' board with a button on it, so I'm not sure how it's wired, but in general I would try this below. The documentation says the button is on GPIO16, which should be pin 0 on all firmwares since 2014-12-19. If your firmware is older than that, you'll probably need to upgrade it.

Code: Select allpin = 0
gpio.mode(pin, gpio.INPUT)
result = gpio.read(pin)


I guess it's possible that the button is wired in such a way that you need to use the pullup resistor?
In which case you could instead use

Code: Select allgpio.mode(pin, gpio.INPUT, gpio.PULLUP)