Node MCU + LM324

Hii Iam using LM324 IC comparator for solar tracking system for detecting high light intensity and I used node mcu to route the pannel direction using servo motor but how to take values in node mcu with single analog pin
i refered the below link while purchasing it
http://bigbelectronics.in/product.php?product=lm324n-operational-amplifier-quad-4-amplifier-1-2-mhz-0-5-v-us-3v-32v-1-5v-16v-dip
please provide with some suggestions thank you