ESP8266 Community Forum

- Wed Apr 01, 2015 8:38 am #13186 The ADC is working fine for me, except when I power up, or drop CH_PD. If there is voltage on the ADC pin it sometimes causes the bootstrap to hang. If I momentarily disconnect ADC it boots normally. Maybe I should be driving it off of a pin rather than the power supply? Has anyone else seen this/is there a better workaround than wasting an IO?

TIA,
Mark McGinty

- Thu Apr 09, 2015 4:07 am #13953 I saw in another thread that voltage cannot exceed 1.0 V on the ADC pin. If I keep it under 1 it doesn't hang, but it always reads 1024. I need to read variable resistance between 400-5K ohms. I'm using a 150 ohm resistor on the ground side of my voltage divider. My volt meter says the divider is working predictably.

Is it possible that I burned the ADC on my chip, with 3.3V? Has anyone here had any success using the 8266's ADC?

TIA