VoCore Forum

Posted: **Thu Aug 06, 2015 7:57 am**

Hi, all
My VoCore info: OpenWrt/Linaro GCC 4.8-2014.04 r44078
I find a question make me confused about gpio0 input value, and wiring diagram as shown below.

: VoCore_1; 20150806_153235副本.jpg (90.29 KiB) Viewed 6170 times

gpio0 can not connected anything, execpt short wire, but when I check gpio0 value, result is:

: gpio0_test; Screen Shot 2015-08-06 at 3.43.30 PM.png (38 KiB) Viewed 6170 times

@^@, who can tell me why?

Posted: **Thu Aug 06, 2015 12:53 pm**

I think maybe you have to add one pull-up resistor if you want to use gpio as input.

Posted: **Fri Aug 07, 2015 2:40 am**

Thanks Vonger, as you said add one pull-down resistor, active-hign, works well.

: VoCore_Sensor; 20150807_101915.jpg (106.26 KiB) Viewed 6151 times

Posted: **Sun Aug 09, 2015 5:15 am**

Looks good

VoCore Forum

gpio0 pin as input, but is value is unstable

gpio0 pin as input, but is value is unstable

Re: gpio0 pin as input, but is value is unstable

Re: gpio0 pin as input, but is value is unstable

Re: gpio0 pin as input, but is value is unstable