ESP32 Forum

Hi,

Could someone help me understand what the sensVP and SensVN pins on the ESP32 WROOM are for?
I would like to use these pins for analogue input but need to check there will be no conflicts.

Cheers!

Hi AnthonyPhan,

AnthonyPhan wrote:Could someone help me understand what the sensVP and SensVN pins on the ESP32 WROOM are for?

They are dedicated to measure small DC signals (e.g. from a thermocouple), see section "Low-Noise Amplifier" in https://espressif.com/sites/default/fil ... ual_en.pdf

AnthonyPhan wrote:I would like to use these pins for analogue input but need to check there will be no conflicts.

You an use either of the as a "regular" analogue input sampled with ADC1, see https://esp-idf.readthedocs.io/en/lates ... s/adc.html

I want to check, if the SENSOR_VP and SENSOR_VN Pin are now usable for low Voltage.

The Amplifier part was removed from the manual, now the pins can be used for an internal hall sensor.

Are they usable?
I want to use it for a load cell.

Thanks in advance for any help.

The low noise amplifier in the ESP32 is removed from the specs and documentation as it never really worked well. As such, you can't use those pins for low voltage measurements. You can still use them as ADC pins, but they have the same range as other ADC pins.