ESP8266 Community Forum

Hi,

I'm pretty new to the ESP8226 and did some tests with the ADC (TOUT).

I'm calling in a 1000 ms timer the adc_read(); method and can see (also I have a static resistor attached to it) completely different values:
148
59
440
473
475
703
628
481
933
630
442
477
629
...

Has anybody seen the same behavior?
Is there any workaround for this?

That's normal behavior when the ADC pin is floating.

I had that too. Which software version you use ?
Make sure the pin doesnt float and only 0..1V, more then 1V will kill the ADC...

You can try out:
//read ADC
unit16 value = test_tout();

If you cant compile that there is a workaround, but i must search ab bit ...

Holger

> 1V will actually kill the hardware, so that, for example, the ADC always reads 1024 no matter what the voltage is on the pin? That's... special.